纸坊沟流域水土流失综合治理减沙效益评价  

Assessment on benefit of sediment reduction by comprehensive controls in the Zhifanggou Watershed

作　　者：江忠善[1,2] 郑粉莉[1,2] 

机构地区：[1]中国科学院,水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [2]西北农林科技大学,陕西杨凌712100

出　　处：《泥沙研究》2004年第2期56-61,共6页Journal of Sediment Research

基　　金：中国科学院知识创新工程重要方向项目"水蚀预报模型研究"(KZCX3_SW_42 2 );‘九五’国家科技攻关黄土高原治理项目"陕北黄土丘陵区(安塞)水土保持型生态农业持续发展研究"(96_0 0 4_0 5_0 4);国家自然科学基金项目 (4 0 3 3 5 0 5 0)

摘　　要：根据纸坊沟流域土壤侵蚀制图和多年径流泥沙观测资料 ,在阐明该流域土壤侵蚀特征的基础上 ,对比分析了“六五”、“七五”、“八五”和“九五”各治理期间流域输沙量的变化 ,重点定量评价了‘八五’和‘九五’期间降雨衰减影响和综合治理影响在流域输沙量减少中的作用。降雨衰减影响占 1 3;而综合治理影响占 2 3。Based on soil erosion mapping and observed data of long_term runoff and sediment from Zhifanggou watershed, soil erosion characteristics in Zhifanggou watershed were addressed, and variations of sediment yield from Zhifanggou watershed at different periods 1981～1985, 1986～1990, 1991～1995, 1996～2000 were analyzed. Contributions of rainfall decreasing and watershed comprehensive controls to the reduction of watershed sediment delivery were respectively estimated. The results showed that the contribution of rainfall decreasing to the reduction of sediment delivery occupied 1/3, and the contribution of watershed comprehensive control to the reduction of sediment delivery accounted for 2/3.

关 键 词：水土流失 减沙 效益评价 纸坊沟流域 土壤侵蚀 

分 类 号：S157.1[农业科学—土壤学]