黄土高原生物措施减水减沙效益动态分析  

Analysis of Runoff and Sediment Reduction from Biological Measurements in the Loess Plateau

作　　者：罗利芳[1] 李双才[2] 叶芝菡[1] 江忠善[3] 

机构地区：[1]北京师范大学资源与环境科学系,北京100875 [2]北京大学遥感与地理信息系统研究所,北京100871 [3]西北农林科技大学,陕西杨凌712100

出　　处：《地理与地理信息科学》2004年第3期78-81,共4页Geography and Geo-Information Science

基　　金：国家自然科学基金重大项目"东北黑土区土壤侵蚀机理与土壤退化预警"(40235056)

摘　　要：为进一步认识黄土高原水土保持措施效益的动态变化特征,使用11个不同水土保持生物措施下的径流小区资料,从产流降雨的角度,分析了农(作物)、草、林灌三种不同生物措施减水减沙作用的年际和年内变化。结果表明,随着年汛期产流降雨的增加,年减沙量与年减水量呈S型增长趋势,农、草类的年减水减沙率有变稳定的趋势,而林灌类的减水减沙率随年汛期产流降雨的增加变化不大;由于农事和农作物的生长特点,相对于林灌类,农、草类年内减水减沙主要集中于7、8月份。研究结果可为进一步认识水土保持措施减水减沙效应、水土保持措施的合理配置和布局提供依据。To further understand the effects of soil and water conservation measures on water resources and water cycle in the Loess Plateau,this paper analyzes the monthly and yearly changes of runoff and sediment reduction from the biological measures for soil and water conservation,including crop,grass,woods and shrub,by the data from 11 runoff plots under different biological measures,and deduces the relationship between these measures and the precipitation.The results can provide the theoretical bases for understanding of effect,rational configuration and layout of the soil and water conservation measures.

关 键 词：黄土高原 水土保持 生物措施 减水减沙 

分 类 号：S157[农业科学—土壤学]