黄土丘陵沟壑区淤地坝沉积泥沙来源分析  

Analysis of sediment source of warping dam in hilly-gullied loess region

作　　者：成晨[1] 刘冰[1] 赵阳[1] 解刚[1] 王友胜[1] CHENG Chen;LIU Bing;ZHAO Yang;XIE Gang;WANG Yousheng(China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]中国水利水电科学研究院,北京100048

出　　处：《南昌工程学院学报》2020年第6期69-74,共6页Journal of Nanchang Institute of Technology

基　　金：国家重点研发计划课题(2016YFC0402404);国家自然科学基金资助项目(51979290);中国水科院基本科研业务费项目(SE0145B132020)。

摘　　要：确定淤地坝的淤积泥沙来源及其贡献率,可以确定淤地坝的减水减沙效果,为水土保持措施治理成效研究提供有力支撑。本文选取黄土高原区典型流域,采集淤地坝沉积泥沙和泥沙来源区样品,计算了淤地坝坝地泥沙来源的贡献率及其在坝内的空间变化。结果显示,随沉积深度的增加,沟道的贡献率逐渐增加,从66%增加到96%,相应坡面的贡献率逐渐减少;越靠近淤地坝,坡面沉积的贡献率增加,从坝后的1%增加到坝中的25%和近坝的22%。本研究显示,沟道是该区泥沙的主要来源区,应加强沟道的防护。Determining the sediment source and contribution rate of warping dam is helpful in determining the water reduction and sediment reduction effect of warping dam,which provides powerful support for the study of control effect of soil and water conservation measures.In this paper,a typical watershed in the Loess Plateau is selected to collect the sediment and sediment source area samples of warping dam,and the contribution rate of sediment source and its spatial variation in the dam area are calculated.The results show that with the increase of sediment depth,the contribution rate of gully increases from 66%to 96%,and the contribution rate of slope surface decreases gradually;the closer to the warping dam,the higher contribution rate,namely,the slope deposition increases from 1%behind the dam to 25%in the middle of the dam and 22%near the dam.This study shows that the gully is the main source of sediment in this area,and the protection of the gullies should be strengthened.

关 键 词：泥沙来源 淤地坝 沟道 指纹识别法 

分 类 号：S157[农业科学—土壤学]