太原市淤地坝泥沙淤积量影响因素  

Analysis of Factors Affecting Sediment Deposition in Cheek Dams in Taiyuan City

作　　者：郝文静 Hao Wenjing(Taiyuan Institute of Water Resources and Soil Conservation Science,Taiyuan,Shanxi,030002)

机构地区：[1]太原市水利水保科学研究院,山西太原030002

出　　处：《山西水土保持科技》2024年第3期52-56,共5页Soil and Water Conservation Science and Technology in Shanxi

摘　　要：淤地坝是黄土高原地区一种重要的水土保持工程措施。基于2022年太原市11座淤地坝淤积量测量以及坝控区域的现状观测数据,探讨淤地坝泥沙淤积的影响因素。结果表明:11座淤地坝2022年测淤积量与坝控流域面积、坝控流域内各类土地利用面积、不同坡度林地面积、耕地面积相关性均未达到显著水平,与急坡草地面积呈极显著相关;淤积量与坝控流域土地利用现状特征数据构建线性模型为:D=7.5235 S_(缓林)-760.769 S_(平草)+26.40195 S_(急草)+8.74186 S_(缓耕)-24.52871,利用纳什效率系数对模型的模拟结果进行检验,得到R^(2)为0.98,纳什系数为0.975,该模型能够较好地预测淤地坝的年淤积量。Check dams are an important soil and water conservation engineering measure in the Loess Plateau region.This study is based on the measurement of sediment deposition in 11 check dams in Taiyuan City in 2022 and the observation of the current conditions in the areas controlled by the dams.The factors affecting sediment deposition in check dams in Taiyuan City are discussed.The results show that the measured sediment deposition in the 11 selected check dams in 2022 did not significantly correlate with the area of the basin controlled by the dams,the area of various land uses within the controlled basin,the area of forest land with different slopes,or the area of cultivated land.However,it showed a highly significant correlation with the area of steep grassland.Using the measured sediment deposition and the current land use characteristics of the basins controlled by the 11 check dams,a linear model was constructed:D=7.5235 S_(gentle_forest)-760.769 S_(flat_grass)+26.40195 S_(steep_grass)+8.74186 S_(gentle_cultivated)-24.52871.The Nash efficiency coefficient was used to test the simulation results of the model,yielding an R^(2) of 0.98 and a Nash coefficient of 0.975,indicating that the model can better predict the annual sediment deposition of check dams.

关 键 词：淤地坝 泥沙淤积 坡度 土地利用类型 太原市 

分 类 号：S157[农业科学—土壤学]