摘要
在水文气象要素一致性及其长期演变趋势研究中,双积累曲线(DMC)方法以简单、直观、实用而被广泛应用。近30年来我国学者应用该方法分析水土保持措施、土地利用变化的水沙效应取得了良好效果。双累积曲线方法的理论基础是分析两个要素(或变量)应具有正比关系。故在应用时要注意分析的要素应该具有相同物理成因或具有明确的因果关系,参考变量应该是不受其他因素影响的、自然变化的正确值,特别是在河流水沙分析中,降雨量需用具有代表性的面平均降雨量。
Double mass curve is a simple,visual and practical method,and it is widely used in the study of the consistency and long-term trend test of hydrometeorological data.In recent 30 years,Chinese researchers analyzed the effect of soil and water conservation measures and land use/cover changes on runoff and sediment using double mass curve method,and have achieved good results.The theory of double mass curve is based on that the two factors（or variables） are proportional.As a result,in the application of double mass curve method,the two variables would have the same physical cause or they would have an obvious causal relationship.In addition,the reference variable is the correct value,being unaffected by natural changes and other factors;particularly in the analysis of the relationship among precipitation,runoff and sediment,area precipitation would be used.
出处
《水文》
CSCD
北大核心
2010年第4期47-51,共5页
Journal of China Hydrology
基金
中国科学院西部行动项目"黄土高原退耕还林(草)环境效应与效益评价"(KZCX2-XB2-05-03)
"973"项目"中国主要水蚀区土壤侵蚀过程与调控研究"(2007CB407203)
关键词
双累积曲线
降雨
径流
输沙
水土保持
土地利用
人类活动
double mass curves
precipitation
runoff
sediment
soil and water conservation
land use/cover
human activity
