A drainage water transport model evaluates the waterlogging control effect of a coupled ditch and pond drainage engineering

被引：0

作者：

Jiao P. ^{[1
]}

Xu D. ^{[1
]}

Xu J. ^{[2
]}

Xiong Y. ^{[3
]}

Yu Y. ^{[1
]}

机构：

[1] Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing

[2] College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing

[3] Agriccultural Water Conserancy Department, Changjiagn River Scientific Research Institute, Wuhan

来源：

Shuili Xuebao/Journal of Hydraulic Engineering | 2020年 / 51卷 / 03期

关键词：

Coupled ditch and pond systems; Improved SCS curve number model; Peak flow reduction; Peak flow retardation; Waterlogging control;

D O I：

10.13243/j.cnki.slxb.20190724

中图分类号：

学科分类号：

摘要：

A coupled ditch and pond drainage engineering has the potential to alleviate agricultural waterlogging and drought disaster and to improve rural ecological environment. To evaluate the waterlogging control effect of a coupled ditch and pond drainage engineering, a drainage water transport model consisting of the improved SCS curve number model and Gamma equation was developed, and the peak flow reduction rate (PFRR) and peak flow delay rate (PFDR) were defined to evaluate the effect of a coupled ditch and pond drainage engineering on peak flow reduction and peak time variation. The developed model simulated accurate drainage hydrograph from a drainage ditch and a coupled ditch and pond drainage engineering, and the Nash-Sutcliffe efficiency (NSE) and coefficient of determination (R2) both were higher than 0.94. PFRR and PFDR are affected by the weir width (Lw), the ratio of weir depth to weir width (Rdw), and the ratio of pond to drainage areas (Ksp). Increasing Ksp or decreasing Lw enhances PFRR and PFDR, and Rdw has little influence on PFRR and PFDR. Both Ksp and Lw contribute 60% variations of PFRR and 85% variations of PFDR, and Ksp contributes more variations than Lw. Obvious interactions occur among the three parameters for both PFRR and PFDR, and adjusting parameters Ksp and Lw could reduce 70% of peak flow and delay 5-fold of time to peak. © 2020, China Water Power Press. All right reserved.

引用

页码：358 / 366

页数：8

共 17 条

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