陕北大、中型淤地坝现状调查与分析  

Field Survey and Analysis on Status of Large and Medium Sized Check-Dams in Northern Shaanxi Province

作　　者：马宁[1] 朱首军[1] 王盼[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《水土保持通报》2011年第3期155-160,共6页Bulletin of Soil and Water Conservation

基　　金：陕西省水土保持局淤地坝建设重大项目

摘　　要：对陕西省淤地坝安全大检查专项行动中陕北大、中型淤地坝的建坝密度、实测拦泥库容、单坝控制面积等指标进行了实地调查和数据整理。结果表明,陕北大、中型淤地坝控制面积为28 703.84 km2,拦沙总量达4.11×1015kg,反映了淤地坝具有显著的拦泥淤地作用。淤地坝的建坝密度、实测拦泥库容、单坝控制面积,两两成正相关关系。陕北榆林市已淤成的大、中型淤地坝地主要用于种植农作物。但种植作物太过单一,而延安市已淤成的大、中型淤地坝地只局限于拦截泥沙。陕北淤地坝主要的管护方式为集体管护。淤地坝各部件中最严重的安全隐患是坝体隐患。Indices of structure density,measured sediment blocking capacity,and single-dam control area were surveyed,compiled and analyzed for the large and medium sized check-dams in Northern Shaanxi Province in the special action of check-dam safety inspection.The results show that the total control area of large and medium sized check-dams was 28 703.84 km2 and the total sediment discharge reduction was 4.11 × 1015 kg,highlighting the critical role of check-dams on sediment blocking and silting.Positive pair-wise correlations were found significantly among building density of check-dams,capacity of sediment blocking and control areas of the single-dam.The silted check-dams of Yulin City were utilized mainly for crops limited to a few species only,while in Yan＇an City,the silted check-dams were confined to sediment holding only.The management and protection of check-dams were conducted collectively through governments.The most serious potential safety hazard of the check-dams could be the hidden danger in the dam body.

关 键 词：水土保持 淤地坝 拦沙效益 

分 类 号：S157.31[农业科学—土壤学]