次暴雨下小理河流域淤地坝拦沙能力分析  

The Sediment Retention Capacity of Warping Dam in Xiaoli River Basin under Rainstorm

作　　者：李莉[1] 史学建[1] 杨吉山[1] 马力 LI Li;SHI Xuejian;YANG Jishan(Yellow River Institute of Hydraulic Research,Yellow River Conservancy Commission,Zhengzhou,He'nan 450003,China)

机构地区：[1]黄河水利委员会黄河水利科学研究院,河南郑州450003

出　　处：《中国水土保持》2020年第12期31-33,I0003,共4页Soil and Water Conservation in China

基　　金：中央级公益性科研院所基本科研业务费专项(HKY-JBW-2018-084,HKY-JBW-2019-12)。

摘　　要：2017年7月26日,黄河支流无定河发生100年一遇的暴雨洪水。小理河流域位于本次200 mm左右雨量的特大暴雨区内,流域内洪水泥沙危害十分严重。淤地坝是该流域治理水土流失的主要工程措施之一,对于拦截泥沙起到了一定作用。针对本次暴雨对小理河流域646座淤地坝开展了调查,测量了215座淤地坝坝库泥沙淤积厚度及面积等,估算出了淤地坝泥沙淤积量,并对其中22座淤地坝的坝库淤积泥沙取样176个,进行了颗粒级配分析。实测数据为年度咨询及明确淤地坝对下游河流输沙过程的影响提供了科学依据。On July 26,2017,the Wuding river occurred once in a century storm flood.Xiaoli river basin is located in the rainstorm area with 200 mm rainfall and the flood and sediment damage are very serious in the basin.Warping dams,the one of the main engineering measures to control soil and water loss of the basin,have played a certain role in intercepting sediment.For this rainstorm,the paper investigated 646 warping dams in the basin,measured the thickness and area of sediment deposition of 215 warping dams,estimated the amount of deposition in the warping dam and analyzed the grain size distribution of 176 samples collected from 22 warping dams.The observed data had provided a scientific basis for annual consultation and clarifying the influence of warping dam to the sediment transport process of downstream river.

关 键 词：小理河流域 淤地坝 拦沙量 泥沙分析 

分 类 号：S157[农业科学—土壤学]