Water Resources and Hydropower Engineering

About the Journal

Journal Title: Water Resources and Hydropower Engineering
Publication Cycle: Monthly(Published on the 20th of each month)
Governing Body: Ministry of Water Resources of the People's Republic of China
Sponsor: Development Research Center of the Ministry of Water Resources
Tel: 010-63205981
E-mail： 13941816@qq.com
China Standard Serial Number (CN): 10-1746/TV
International Standard Serial Number (ISSN): 1000-0860

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Solicitation letter for the special issue of "Climate Change, Extreme Weather, and Complex Disaster Response"

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Current Issue Archive Online First Most Cited Most Download

Issue 07,2026

气候变化的背景下干旱的多尺度响应机制与韧性适应路径专栏

Multi-scale drought characteristics in Mu Us Sandy Land from 2002 to 2021

WANG Xiaohan;LIANG Lie;CHAO Yan;GAO Wenwei;

[Objective]Global warming has led to frequent natural disasters. The spatiotemporal evolution patterns of drought in the Mu Us Sandy Land(MUSL) are investigated.[Methods]Based on high-resolution meteorological data from 2002 to 2021, multiple method were employed, including percent of normal precipitation(PNP), empirical orthogonal function(EOF), Mann-Kendall(M-K) test, and wavelet analysis, to analyze the spatiotemporal characteristics of drought in this region across multiple time scales.[Results]The result showed that:(1) except for the monthly scale, where the drought trend was insignificant, all other time scales showed a significant alleviating trend, which was more pronounced at longer time scales.(2) Drought was spatially distributed in a central radiating pattern, with the central area experiencing more severe drought and being more sensitive to responses. Short-term droughts were characterized by intense fluctuations and frequent wet-dry transitions, while long-term droughts persisted for extended durations with weaker fluctuations.(3) PNP detected more extreme drought events at short-term time scales, exhibiting irregular periodic changes. In contrast, droughts at long-term time scales persisted for extended durations with more stable cycles, and showed significant changes around 2011.[Conclusion]These findings reveal the multi-scale characteristics of drought in the MUSL, which can provide a scientific basis for the evaluation and application of drought indicators at different time scales, regional drought monitoring, and the formulation of disaster prevention measures.

Issue 07 ,2026 v.57 ;
[Downloads: 213 ] [Citations: 0 ] [Reads: 63 ] HTML PDF Cite this article

Analysis of non-stationary hydrological drought in Alagou River Basin of Turpan based on GAMLSS model

ZHU Xiaoyu;MU Zhenxia;SONG Zhilin;WANG Teng;CHEN Longyao;

[Objective]In the context of climate change and intensified human activities, traditional hydrological drought indices based on the stationarity assumption struggle to accurately characterize the actual drought conditions. To scientifically evaluate hydrological drought under non-stationary conditions, it is necessary to develop a novel drought assessment method that can integrate both natural and human impact factors.[Methods]Based on multi-source data, the natural runoff series during the disturbance period was reconstructed, and the human activity index(HI) was quantified after comparing the performance of long short-term memory(LSTM) and random forest(RF) machine learning models. Using the generalized additive models for location, scale and shape(GAMLSS) model, stationary and non-stationary models were constructed with precipitation, temperature, and HI as covariates, and the stationary hydrological drought index(SRI) and non-stationary hydrological drought index(NSRI) were calculated. Based on the performance comparison of the two indices, the characteristics of hydrological drought under non-stationary conditions were revealed using Copula functions.[Results]The result showed that:(1) the runoff series in the study area underwent an abrupt change in 1988, exhibiting significant non-stationary characteristics, with runoff increasing by 35.5% after the change point.(2) The fitting performance of the non-stationary model was superior to that of the stationary model in all months, with the model combination including HI showing the best performance. Compared with SRI, NSRI was more accurate in identifying the process and severity of typical drought events, while the SRI showed significant underestimation.(3) From 1989 to 2020, a total of 37 hydrological drought events occurred in the river basin, with an average duration of 2.97 months and an average severity of 3.27. The overall drought trend was intensifying, with spring droughts characterized by long duration and high severity, while summer droughts exhibited short duration and high frequency.(4) Joint probability analysis based on Copula functions indicated a negative correlation between drought duration and severity. The joint return period(12.9 years) of hydrological drought was significantly shorter than the co-occurrence return period(113.4 years).[Conclusion]The constructed NSRI characterizes non-stationary drought processes more accurately than traditional method by coupling climate and human activity factors, and human activity is identified as a key driver of drought evolution. During the disturbance period, hydrological drought in the river basin has intensified. The findings can provide a scientific basis for water resource management and risk prevention in arid areas.

Issue 07 ,2026 v.57 ;
[Downloads: 278 ] [Citations: 0 ] [Reads: 59 ] HTML PDF Cite this article

Research on hydrological drought trends in water source area of South-to-North Water Diversion Middle Route Project under different climate scenarios

LI Duofen;LIU Zhao;BAI Yu;GUAN Zilong;ZHANG Jinxia;ZHANG Jiaqi;HE Zhaoliang;

[Objective]Future evolution of hydrological drought in the water source area of the South-to-North Water Diversion Middle Route Project under climate change is quantified, providing a basis for the security management and scheduling optimization of water resources for the project.[Methods]Downscaled data under the SSP1-2.6, SSP2-4.5, and SSP5-8.5 scenarios from the CMCC-ESM2 model in CMIP6 were used to drive the SWAT model to simulate the runoff processes in the water source area for the future period(2026—2100). The Mann-Kendall trend test and the annual-scale standardized runoff index(SRI) were applied to identify evolution trends of runoff and hydrological drought.[Results]Compared with the baseline period(1970—2020), the future multi-year average runoff in the water source area showed an increasing trend under different climate scenarios, and the magnitude of increase expanded as radiative forcing intensified. The upper-reach Hanzhong station exhibited the most pronounced increase and trend significance, while the runoff increment was most notable at the downstream Baihe station. Significant spatial heterogeneity was observed in the future hydrological drought across the water source area. Under the SSP1-2.6 scenario, the drought frequency in the middle and lower reaches decreased to 0.33～0.45, and the drought severity was reduced compared with the baseline period. Under the SSP2-4.5 and SSP5-8.5 scenarios, the drought frequency in the upper reach increased to 0.40～0.45, and the maximum increases in drought duration and severity at the Ankang station reached 22.1% and 23.4%, respectively.[Conclusion]The water source area exhibits pronounced spatial differences in its response to climate change. Under low-to-medium emission scenarios, Hanzhong and Baihe stations are characterized by a “high-frequency, short-duration, and low-severity” pattern. Under high-emission scenarios, droughts in the middle and lower reaches tend to become more persistent and intense, imposing greater demands on water resource allocation and drought mitigation in the future for the Middle Route Project.

Issue 07 ,2026 v.57 ;
[Downloads: 391 ] [Citations: 0 ] [Reads: 53 ] HTML PDF Cite this article

复杂灾害链与水旱巨灾风险评估专栏

Urban flood risk assessment based on game theory-based combination weighting method

LU Xin;LI Fengsen;XIE Xindong;ZOU Yingjiang;WANG Zhichao;XUE Baizhang;HUANG Xuhua;WANG Jian;WANG Xiule;Jiangxi Academy of Water Science and Engineering;

[Objective]Flood risk assessment is crucial for developing regional disaster prevention and mitigation systems. However, current research focuses mainly on large-scale areas such as counties and cities, with limited attention to small-scale urban districts. The aim is to effectively assess urban flood risk and enhance the refinement level of risk assessment.[Methods]A flood risk assessment method suitable for urban areas was established by integrating the MIKEFLOOD hydrodynamic modeling technique with a game theory-based combination weighting model. Taking the urban area of Dexing City as an example, multi-source data were collected, including rainfall and runoff process from 12:00 on June 18 to 12:00 on June 23, 2022, a high-resolution digital elevation model(DEM) of the urban area obtained from UAV aerial photography, and measured river cross-sections. A MIKEFLOOD hydrodynamic model for the Dexing urban area was then constructed for flood simulation. After validating the model, four hazard indicators were selected based on the flood simulation result: maximum inundation depth, maximum inundation duration, maximum inundation area, and maximum inundation flow velocity. These were combined with indicators of environmental vulnerability and disaster-bearing body exposure to establish an urban flood disaster risk assessment system. To address the indicator weighting problem within the assessment system, game theory was innovatively introduced to effectively integrate subjective experience with objective data information, thereby overcoming the limitations of single weighting method. This enabled systematic analysis of the flood disaster risk indicators and effective assessment of flood disaster risk in the Dexing urban area.[Results]The result showed that there were 22 communities in the Dexing urban area, among which 13 were classified as high-risk, including Xinyingyi Village(high-risk area of 0.115 km²), Shangzhou Community(0.067 km²), Tianmenshan Community(0.034 km²), Suihanshan Community(0.024 km²), Jishui Community(0.020 km²), Shuilvqiao Community(0.019 km²), Yinshan Community(0.013 km²), Nanmen Community(0.012 km²), Kentangshan Community(0.011 km²), Yinquan Community(0.011 km²), Wuyuan Community(0.009 km²), Shengliting Community(0.004 km²), and Wuanlu Community(0.002 km²).[Conclusion]The result indicate that the MIKEFLOOD model demonstrates good accuracy and reliability in urban flood simulation, effectively revealing the spatial distribution characteristics of flood in urban areas. The high-precision DEM obtained via UAV aerial photography is crucial for urban flood risk assessment, as it not only provides accurate topographic information for the MIKEFLOOD model but also offers a reliable basis for environmental vulnerability analysis. For small-scale urban areas, UAV aerial surveying should be used to obtain elevation data. Significant differences are observed between the weights calculated by the entropy weight method and the analytic hierarchy process, making it difficult to achieve effective balance through subjective judgment alone. In contrast, the game theory-based combination weighting method, based on mathematical principles, integrates the result of these two weighting method to achieve a more scientific and rational weight allocation, providing important reference value for weight determination in comprehensive assessment. The flood risk assessment result for the Dexing urban area provide a reliable decision-making basis for the precise prevention of flood disasters and for risk classification and control in the future. Additionally, they can serve as a theoretical and method ological reference for flood prevention and mitigation efforts in similar regions.

Issue 07 ,2026 v.57 ;
[Downloads: 681 ] [Citations: 1 ] [Reads: 50 ] HTML PDF Cite this article

城市水循环过程解析与水质安全保障专栏

Analysis of pollution sources in Qinhuai River based on water quality grouping and hydrochemical characteristics

XU Diandian;XUE Zongpu;CHEN Huaimin;CAI Yue;ZHOU Shun;DUAN Zhipeng;

[Objective]To identify the major pollution sources in typical river sections within highly urbanized watersheds and enhance the scientific and precise management of urban river water quality, the Qinhuai River Basin in Nanjing was selected as a case study. By integrating the fluorescence characteristics of dissolved organic matter(DOM) with hydrochemical parameters, an evaluation framework is developed for pollution source analysis and water quality correlation.[Methods]Water samples from typical cross-sections of the main and tributary channels of the Qinhuai River were analyzed using three-dimensional excitation-emission matrix(EEM) fluorescence spectroscopy combined with parallel factor analysis(PARAFAC) to extract DOM fluorescent components. Fluorescence indices such as SUVA254 and spectral slope(S_R) were used to further interpret their source characteristics. Meanwhile, cations(K⁺, Ca²⁺, Na⁺, Mg²⁺) and other water quality indicators were measured, and the correlation analysis with the water quality index(WQI) was conducted to explore the evolution patterns of river water quality under multi-source pollution.[Results]The result showed that the fluorescent components C1—C4 were associated with surface runoff, sewage discharge, and sediment release, respectively. Among them, C3 was significantly elevated near sewage discharge points, C4 indicated endogenous release from sediments, and C2 showed composite characteristics of multiple sources. No significant correlations were observed among DOM spectral indices, suggesting strong interference from endogenous DOM on fluorescence signals, which limited their ability to be used independently for pollution source identification. Hydrochemical analysis revealed a negative correlation between cation concentrations and water quality conditions. The concentrations of the four ions synchronously increased in regions with low WQI, indicating that sewage concentration effects dominated their distribution. A significant positive correlation was observed between Na⁺ and NO~-₃-N. Combined with effluent monitoring data from sewage treatment plants, this indicated that the tailwater of sewage treatment plants was the primary source of total nitrogen in the watershed.[Conclusion]The combined analysis of DOM spectral characteristics and hydrochemical indicators helps identify key pollution types and driving factors in urban rivers, providing technical support for refined pollution control and zoned management strategies in urban river systems.

Issue 07 ,2026 v.57 ;
[Downloads: 313 ] [Citations: 2 ] [Reads: 42 ] HTML PDF Cite this article

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Study on the detection and distribution patterns of exposed rockfill at the construction lift joints of rock-filled concrete arch dams

AN Yu;YANG Jiaqi;WANG Yuanxi;ZHANG Xingyi;JIN Feng;

[Objective] The construction lift joints of Rock-Filled Concrete (RFC) dams are considered relatively weak zones. Retaining a certain proportion of exposed rockfill can significantly enhance the shear resistance of these joints. Proposing rapid detection and evaluation methods for exposed rockfill at lift joints， along with a systematic analysis of the actual field exposure conditions， can ensure engineering quality and provide valuable references for the design and construction of similar dams. [Methods] In view of this， a segmentation， identification， and analytical evaluation method was proposed for rockfill exposure on lift joints， incorporating an improved YOLOv11 algorithm and updated specification requirements. On this basis， the distribution patterns of rockfill exposure across 30 lift joints of an RFC arch dam in Southeast China are discussed. [Results] The improved YOLOv11 segmentation model achieved a precision (P) of 91.4%， recall (R) of 89.3%， mean average precision (e50) of 76.2%， and a frame rate of 68 FPS. The average exposed rockfill ratio across all inspected lift joints exceeded 10%; however， three non-compliant lifts were identified with localized exposed rockfill ratios below this threshold. Furthermore， statistical tests confirmed that both the overall and individual-lift distributions of the exposed rockfill ratio follow a Weibull distribution. [Conclusion] The improved YOLOv11 model demonstrates strong performance in both recognition accuracy and computational efficiency for identifying exposed rockfill at construction lift joints. Furthermore， the newly revised specifications not only establish requirements for the distribution of exposed rockfill but also strike a balance by ensuring operational flexibility during field construction. Moreover， the Weibull distribution is shown to accurately characterize the actual field-measured exposure conditions of the lift joints.

Online First Publication Date (Accepted Manuscript):2026-09-18 09:07:26 ; 国家自然科学基金项目(52039005)
[Downloads: 0 ] [Citations: 0 ] [Reads: 2 ] HTML PDF Cite this article

Research on multi-site daily runoff prediction based on RNN-GNN under multi-source remote sensing data and graph-structure constraints

FANG Yuchen;DENG Chao;ZOU Jiacheng;LUO Jingjia;

[Objective] Runoff prediction in river basins plays a crucial role in improving hydrological prediction accuracy and water resources management at the basin scale. However， existing runoff prediction methods still have certain limitations in characterizing hydrological interactions and spatial dependencies among stations. To improve the accuracy of multi-site daily runoff prediction， a hybrid model coupling recurrent neural network (RNN) with a graph neural network (GNN) is established to conduct daily-scale runoff prediction in river basins. [Methods] Three hydrological stations in the Ganjiang River Basin were selected as the study sites. Two RNN models， namely long short-term memory (LSTM) and gated recurrent unit (GRU)， were constructed and separately coupled with GNN to compare and analyze the runoff prediction performance of different hybrid models. Furthermore， different input-feature combinations and graph-structure construction methods were set to evaluate the effects of differences in input features and graph-structure construction on the prediction accuracy and robustness of hybrid models. [Results] The results showed that introducing GNN could effectively reduce the errors between observed and predicted runoff of single RNN-based models， with the maximum error reduction reaching 22.94%. In terms of input features， using a single high-quality remote sensing product to replace the corresponding ground observation data as model inputs could achieve relatively good prediction performance， while the simultaneous use of precipitation and potential evapotranspiration remote sensing data could further significantly improve model performance， reducing the relative error (RE) by 7.1%–97.4%. In addition， different construction methods of graph structure directly determined the variation patterns and trends of their monthly mean RE. [Conclusion] The findings indicate that incorporating GNN can enhance the ability of RNN-based models to predict multi-site runoff processes in the river basin， helping reduce prediction errors and improve model robustness. A reasonable graph structure should reflect the runoff relationships between upstream and downstream stations， as well as the driving effects of precipitation on the runoff processes at each station， which has an important impact on model prediction results. The findings can provide a reference for the construction of multi-site runoff prediction models， graph-structure design， and the integrated application of multi-source hydrometeorological factors.

Online First Publication Date (Accepted Manuscript):2026-09-16 16:19:32 ; 国家重点研发计划项目(2022YFC3202802)
[Downloads: 32 ] [Citations: 0 ] [Reads: 2 ] HTML PDF Cite this article

Experimental study on the effect of circular ground-connected wall joints on wall force deformation

ZHANG Jun;YANG Yulin;WU Renhui;

Circular ground-connected walls are a widely favored choice for foundation pit projects due to their strong structural stability and minimal radial deformation. However， the stiffness variation between the joints and the wall in segmental casting construction can potentially compromise the overall stiffness of the wall， thus undermining its arch effect and jeopardizing its stability. To address this issue， this paper uses indoor model testing and numerical simulation to investigate how changes in joint form and quantity impact the internal forces and deformation of circular ground-connected walls. A 3D numerical model with Midas GTS/NX is used to compare and analyze the calculated results with the measured outcomes. The findings show that the presence or absence of joints and the form of joints significantly influence wall stresses， with joint form having a greater impact than joint quantity. The study also reveals that vertical stress increases with joint stiffness， while circumferential stress decreases with increased joint stiffness. Additionally， vertical stress decreases with an increased number of joints， while circumferential stress rises with greater joint quantity. The radial displacement of the wall mirrors the change in annular stress， with minimal overall displacement. This research provides valuable insights into the factors influencing the stability of circular ground-connected walls， paving the way for improved construction practices and structural integrity.

Online First Publication Date (Accepted Manuscript):2026-09-16 16:12:43 ; 国家自然科学基金资助项目（52178381）
[Downloads: 6 ] [Citations: 0 ] [Reads: 2 ] HTML PDF Cite this article

Analysis of the temporal and spatial variation characteristics and influencing factors of extreme climate in northeast Yunnan from 1970 to 2018

YUAN Li;WU Lihua;WU Kunde;LIU Junfeng;LIU Wei;GAO Haonan;

[Objective] Northeastern Yunnan， a high-altitude region in Yunnan Province， is highly sensitive to global warming. Revealing the characteristics of extreme climate change and its influencing factors is essential for regional climate disaster prevention and sustainable development. [Methods] Based on daily temperature and precipitation data from 11 meteorological stations in northeastern Yunnan from 1970 to 2018， 20 extreme climate indices were selected. Linear regression， the Mann-Kendall test， Morlet wavelet analysis， Pearson correlation analysis， wavelet transform coherence (WTC)， and cross-wavelet transform (XWT) were employed to investigate the spatiotemporal characteristics of extreme climate and its relationship with large-scale circulation indices. [Results] Temporally， all extreme temperature indices exhibited significant increasing trends except TX10p， TN10p， and CSDI， which decreased significantly. Among the precipitation indices， only R1 and CWD showed significant decreases， whereas the remaining indices exhibited no significant trends. Abrupt changes mainly occurred from the 1990s to the early 2000s， and most indices exhibited pronounced multi-timescale oscillations. Spatially， the spatial variation characteristics of the extreme climate index are significant. Warm temperature indices and TNn generally increased from northwest to southeast， whereas the remaining cold temperature indices displayed the opposite pattern. High-value areas of precipitation-duration indices (except CDD) were mainly distributed between Qiaojia and Suijiang counties， while those of precipitation-amount indices (except PRCPTOT) were concentrated around Huize County. Influencing factors， elevation was significantly negatively correlated with TXx， TNx， and TXn， but positively correlated with TX10p. Mean annual precipitation showed significant positive correlations with all precipitation indices except CDD. Among the large-scale circulation factors， the Atlantic Multidecadal Oscillation (AMO) exerted the strongest influence， showing positive correlations with warm temperature indices and several heavy-precipitation indices， but negative correlations with cold temperature indices. Moreover， significant Multi-scale collaborative changes and phase differences were identified between the AMO and extreme climate indices. [Conclusion] Extreme climate in northeastern Yunnan showed significant warming， with prominent spatial differentiation. Altitude and mean annual precipitation serve as important influencing factors for extreme temperature and precipitation indices， respectively， and AMO has a potential modulating effect on regional extreme climate change.

Online First Publication Date (Accepted Manuscript):2026-09-14 15:24:19 ; 国家自然科学基金(42061012); 云南省水土保持与荒漠化防治学一流学科开放课题(SBK20240019); 西南林业大学科研预研基金(110822129)
[Downloads: 42 ] [Citations: 0 ] [Reads: 2 ] HTML PDF Cite this article

Identifying key thresholds for flood-season operating water level in a riverine reservoir based on its intrinsic flood-regulation capacity boundary: a case study of Three Gorges Reservoir

ZHAI Yanwei;JIANG Dingguo;ZHANG Chengxiao;REN Shi;

[Objective] Against the background of increasingly intense extreme rainfall， increasingly complex flood encounters， and growing demand for refined water resource utilization， the potential of the reservoir for flood control and beneficial use is explored， and the key threshold of the flood-season operating water level constrained by the intrinsic flood-regulation capacity of the Three Gorges Project is identified， thereby providing a basis for dynamic water-level control and flood-resource utilization. [Methods] Under a baseline scenario excluding joint operation with upstream cascade reservoirs and forecast-based pre-release， a one-dimensional unsteady-flow hydrodynamic model of the Three Gorges Reservoir area was developed and optimized. Segmented storage-capacity matching and inversion of uncontrolled interval inflow were introduced to improve the simulation accuracy of longitudinal water-level processes in this riverine reservoir. Typical flood events in 1954， 1966， 1981， 1982， 1998， 2012， and 2020 were selected， and design floods with exceedance probabilities of 1%， 0.1%， and 0.01% were generated using the equal-frequency amplification method. The maximum regulated water level at the dam front and excess flood volumewere analyzed under different initial operating water levels and staged release conditions. [Results] The optimized model satisfactorily reproduced the longitudinal water-level processes in the reservoir area. The mean absolute errors and root mean square errors at the representative stations ranged from 0.03 to 0.35 m and from 0.03 to 0.49 m， respectively. When the initial operating water level did not exceed 155 m， the maximum regulated water level and cumulative outflow volume varied only slightly with the initial level under most typical flood conditions. Once the initial operating water level exceeded 155 m， the remaining effective flood-control storage decreased further， and both the maximum regulated water level and high-discharge outflow response became more sensitive to further increases in the initial level. For a fixed initial operating water level， increasing the prescribed release limit generally reduced the maximum regulated water level. For the 0.1% and 0.01% design floods， however， a higher release limit could increase the duration or cumulative volume of high-discharge operation. [Conclusion] Under the model structure， design-flood scenarios， operation rules， and boundary conditions adopted in this study， 155 m can be regarded as a conservative reference boundary for changes in the intrinsic flood-regulation capacity of the Three Gorges Project. The flood-regulation response remains relatively stable and a comparatively large regulation margin is retained when the initial operating water level ranges from 145 to 155 m. However， 155 m should not be interpreted as a fixed flood-season operating water level. The findings provide a basis for future studies on dynamic flood-season water-level control and flood-resource utilization incorporating real-time flood forecasts， coordinated cascade operation， and forecast-based pre-release.

Online First Publication Date (Accepted Manuscript):2026-09-10 10:12:24 ; 国家自然科学基金项目（52109081）; 中国长江三峡集团有限公司科研项目（WWKY-2021-0439）; 国家重点研发计划项目(2022YFC3203900)
[Downloads: 36 ] [Citations: 0 ] [Reads: 3 ] HTML PDF Cite this article

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Issue 06 ,1989 ;
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Issue 07 ,2003 ;
[Downloads: 3,472 ] [Citations: 389 ] [Reads: 94 ] HTML PDF Cite this article

Simulative analysis on storm flood in typical urban region of Beijing based on SWMM

CONG Xiang-yu1, NI Guang-heng1, HUI Shi-bo1, TIAN Fu-qiang1, ZHANG Tong2(1.Department of Hydraulic Engineering, Tsinghua University, Beijing 100084,China; 2.Beijing Municipal Institute of Hydraulic Engineering Planning, Design & Research, Beijing 100044,China)

Based on SWMM(Storm Water Management Model), a typical urban region is selected to calculate the status under the design storms with different frequencies in the region, such as drainage effect and water-logging, overland flow on road etc.,and simultaneously, the storm floods under different conditions, including reforming the protruding green belts into plain or concave ones, placing flood storage areas etc.,are simulated with the evaluation on their effects. The simulative calculation results show that all the three measures mentioned herein have larger effects on the infiltration, runoff, flood peak flow and overland flow and can greatly alleviate the pressure of the draining pipeline, clip the flood peak and increase the infiltration as well, if they are taken as the additional important measures of urban drainage for flood control.

Issue 04 ,2006 ;
[Downloads: 4,814 ] [Citations: 362 ] [Reads: 158 ] HTML PDF Cite this article

Issue 09 ,2003 ;
[Downloads: 4,005 ] [Citations: 354 ] [Reads: 93 ] HTML PDF Cite this article

Issue 07 ,2002 ;
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Study on fragmentation of emergency management during “7·20” extreme rainstorm flood disaster in Zhengzhou of Henan Province and relevant comprehensive treatment

CHEN Zhouying;KONG Feng;

Under the background of global warming, frequent rainstorms and floods affect urban and rural areas in China. Emergency management is the last defence line to ensure the safety of people′s lives and property. Fragmentation severely restricts the effectiveness of emergency management.The problem of fragmentation of emergency management exposes during dealing with the “7-20” extreme rainstorm flood in Zhengzhou of Henan Province. Therefore, the performances and negative impacts from the fragmented actions of all the emergency subjects during the “7-20” extreme rainstorm flood disaster are studied herein, and then the relevant suggestions on the emergency comprehensive treatment of the rainstorm flood are proposed as well, so as to enhance the effectiveness of the storm-flooding emergency management in China and provide some references and experiences for the other cities and regions. The study finds out that(1) the fragmentation of emergency management is composed of the causations in several aspects, such as fragmentation of emergency system, fragmentation of emergency organization design, fragmentation of emergency information, fragmentation of emergency awareness, fragmentation of emergency subject and object, etc., especially the fragmentation of emergency system affects all the other four aspects;(2) the fragmentation of emergency system leads to the lack of the coordination among the emergency actions of all the emergency subjects in Zhengzhou and the failure of the performances of their emergency duties; the fragmentation of emergency authority and responsibility leads to the management dislocation and omission; the fragmentation of emergency information leads to the difficulty of emergency decision-making and post-disaster learning; the fragmentation of emergency perception exacerbates the difficulty of disaster risk and management; the fragmentation of emergency information leads to the difficulty of emergency decision-making and post-disaster learning; the fragmentation of emergency awareness intensifies disaster risk and management difficulty; the fragmentation of emergency objects leads to high disaster-bearing vulnerability of the vulnerable areas and vulnerable groups;(3) the comprehensive treatment measures for the fragmentation of the emergency management of storm-flooding disaster include promoting the connection and integration of flood control emergency systems, implementing flood control drilling, realizing the whole process of emergency management, optimizing the organizational design of flood control emergency response, improving overall coordination mechanism, promoting the matchment of authorities with responsibilities, establishing a flood control information sharing platform and obtaining more comprehensive disaster information with advanced techniques, strengthening emergency training and changing leadership thinking to promote the culture integration of the emergency flood control awareness, so as to break the dual concept and system of emergency service with the goal of achieving equalization.

Issue 08 ,2022 v.53 ;
[Downloads: 6,907 ] [Citations: 90 ] [Reads: 211 ] HTML PDF Cite this article

Theories and practices of river eco-restoration

DONG Zhe-ren,SUN Dong-ya,PENG Jing(China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

A holistic model of river eco-restoration is put forward herein,and then the stresses from water works on river eco-systems and their mechanism are comprehensively analyzed with a systematical introspection on the traditional planning and design concept and method of the water projects.Furthermore,both the planning principle and the assessment method for river eco-restoration and the technology of the eco-restoration of river corridor are summarized.At last,a demonstration project is briefly introduced as well.

Issue 01 ,2009 v.40 ;
[Downloads: 5,072 ] [Citations: 201 ] [Reads: 151 ] HTML PDF Cite this article

Loess Plateau soil erosion governance and runoff-sediment variation of Yellow River

HU Chunhong;ZHANG Xiaoming;

"The Yellow River governance focuses on protection and governance". Clarifying the effects of ecological governance on the Loess Plateau and its influences on variation of the runoff-sediment relationship of the Yellow River is helpful to provide a scientific and technical support for the coordinating the runoff-sediment relationship of the Yellow River. Through sorting out the processes of soil erosion control of the Loess Plateau and the changes of the governance measures, the sediment reduction effect of the governance measure are discriminated and analyzed herein. The study shows that(1)the Loess Plateau experiences five ty-pical governance processes and the dominant hue of the Loess Plateau changes from yellow to green, while the underlying surface therein is irreversibly changed;(2)since 2000, the rainfalls during flood seasonsare relatively abundant along with the increases of extreme rainfalls, while the sediment transport of the Yellow River is sharply decreased by 85% if it is compared with that du-ring the period of 1919—1959 along with the decreases of the occurrence frequencies of the middle stream moderate and normal floods and the transformation of the downstream channel sedimentation into erosion;(3)the sediment reduction effects from grass-land, terraced fields and warp-land dams are significant along with the sediment discharge ratio of less than 15%, thus the phenomenon of the so called"deposit in installments while withdraw in lump sum"is difficult to occur;(4)comparing with the historical extreme rainfall events, the typical secondary flood volumes and sediment yields within the river basin are decreased by 30%～78% and 53%～88% respectively with significant soil and water conservation effects under the conditions of the similar rainfalls and the intensities after 2000;(5)it is advisable to adjust the patterns of the soil erosion governanceof the Loess Plateau, perfect the water-sediment regulation system, improve the downstream channel and emancipate the flood plain under the new situation of water-sediment regime therein.

Issue 01 ,2020 v.51 ;
[Downloads: 4,850 ] [Citations: 158 ] [Reads: 213 ] HTML PDF Cite this article

Simulative analysis on storm flood in typical urban region of Beijing based on SWMM

Issue 04 ,2006 ;
[Downloads: 4,814 ] [Citations: 362 ] [Reads: 158 ] HTML PDF Cite this article

Issue 09 ,2003 ;
[Downloads: 4,005 ] [Citations: 354 ] [Reads: 93 ] HTML PDF Cite this article

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Multi-scale drought characteristics in Mu Us Sandy Land from 2002 to 2021

Analysis of non-stationary hydrological drought in Alagou River Basin of Turpan based on GAMLSS model

Research on hydrological drought trends in water source area of South-to-North Water Diversion Middle Route Project under different climate scenarios

Urban flood risk assessment based on game theory-based combination weighting method

Analysis of pollution sources in Qinhuai River based on water quality grouping and hydrochemical characteristics

Study on the detection and distribution patterns of exposed rockfill at the construction lift joints of rock-filled concrete arch dams

Research on multi-site daily runoff prediction based on RNN-GNN under multi-source remote sensing data and graph-structure constraints

Experimental study on the effect of circular ground-connected wall joints on wall force deformation

Analysis of the temporal and spatial variation characteristics and influencing factors of extreme climate in northeast Yunnan from 1970 to 2018

Identifying key thresholds for flood-season operating water level in a riverine reservoir based on its intrinsic flood-regulation capacity boundary: a case study of Three Gorges Reservoir

Simulative analysis on storm flood in typical urban region of Beijing based on SWMM

Study on fragmentation of emergency management during “7·20” extreme rainstorm flood disaster in Zhengzhou of Henan Province and relevant comprehensive treatment

Theories and practices of river eco-restoration

Loess Plateau soil erosion governance and runoff-sediment variation of Yellow River

Simulative analysis on storm flood in typical urban region of Beijing based on SWMM

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