水利学报2018，Vol.49Issue(2)：145-155,11.DOI:10.13243/j.cnki.slxb.20170925
黄土高原淤地坝的减沙作用及其时效性
Sediment reduction of warping dams and its timeliness in the Loess Plateau
摘要
Abstract
The sediment reducing effect of warping dams need to be discussed thoroughly due to the sharp decline of the sediment runoff of the Yellow River in recent years.Based on the observed data,this paper analyzed the relationship between the intercepted sediment quantity of warping dams and the corresponding sediment incoming reduction of the Yellow River,the timeliness of sediment intercept ability,and the erosion reduction function of the warping land.The study results reveal that the intercepted sediment quantity of warping dams is normally larger than or equal to the corresponding sediment incoming reduction of the Yellow River.The higher the basin's vegetation-terrace coverage degree and the coarser the Soil particle size is,the smaller will be the proportion of sediment incoming reduction to the intercepted sediment quantity.The timeliness of the dams' sediment trapping function is very prominent,once the sediment storage usage limit is reached,a warping dam would lost its sediment trapping capacity.After that,the dam will continuously reduce and control the soil erosion by its warping land.The influence area of warping land in the term of erosion reduction even reaches 4 times of warping land area,if the vegetation-terrace coverage of the basin is rather poor.But with increased vegetation-terrace coverage rate,the erosion reducing quantity of warping lands will be gradually weakened.关键词
黄土高原/淤地坝/拦沙/减沙/时效性/坝地Key words
Loess Plateau/warping dams/intercepted sediment quantity/timeliness/warping land/sediment reduction分类
农业科技引用本文复制引用
刘晓燕,高云飞,马三保,董国涛..黄土高原淤地坝的减沙作用及其时效性[J].水利学报,2018,49(2):145-155,11.基金项目
国家重点研发计划项目(2016YFC0102403) （2016YFC0102403）
