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The analysis of river runoff process is very important for engineering construction. The existing hydrological models mainly take the river basin as the research object, and the research space scale is usually large, so it is difficult to analyze the river runoff volume in a small space scale. Based on the dualistic water cycle model, this paper systematically analyzes the influencing factors of river runoff from both natural and social aspects, and establishes the actual runoff calculation method of the dualistic water cycle model. The natural term takes into account the upstream inflow, interval runoff, river diversion and exchange with groundwater comprehensively, while the social term takes into account the artificial diversion, the reversion and the subdivision water quantity, among which the agricultural reversion is further subdivided into the water use period and the non-water use period. Taking Wenjiang section of Jinma River as a case study, according to the positional relationship between river course, planned sluice dam and canal system, 9 fault surfaces are selected for analysis. According to the calculation results, the incoming water from the interval accounts for 12.5% of the total runoff and is an important part of the runoff of Jinma River. The annual runoff distribution of Jinma River is obviously uneven, and the runoff from April to October accounts for 89.6% of the total runoff, which is mainly discharged in the form of flood. Therefore, it is necessary to build cascade dams to improve the river storage capacity. The contribution rate of agricultural receding water amount to 14.89% in the dry year for the intake section of Minjiang Water Works. In dry years, social term runoff has an important influence on the accurate calculation of river runoff. In the relevant standards of water conservancy project construction, it is necessary to strengthen the analysis of the reliability, consistency and representativeness of social and economic water use. The method proposed in this paper can be used to calculate the river runoff in small scale, which has certain theoretical and practical significance.
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Basic Information:
DOI：10.13928/j.cnki.wrahe.2021.12.007
China Classification Code:P333
Citation Information:
[1]LIN Pengfei,YOU Jinjun,JING Xiangyang ,et al.Calculation of actual river runoff based on dualistic water cycle model-a case study of Minjiang Jinma River section[J].Water Resources and Hydropower Engineering,2021,52(12):69-79.DOI:10.13928/j.cnki.wrahe.2021.12.007.
Fund Information:
国家自然科学基金项目(52079143); 国家重点研发计划(2018YFC0407705,2017YFC0404405); 中电建成都院公司自主研究课题(P34516)
2021-05-28
2021-05-28
2021-05-28