摘要
水土流失治理的水沙效应研究是水土保持规划与治理实践的重要理论基础。以秃尾河流域降水、径流、泥沙等资料为基础,采用Mann-Kendall秩次相关法和距平累积方法分析降水、输沙特征及其变化。结果表明:秃尾河流域输沙量在多年变化中呈明显下降趋势;针对影响流域输沙变化的降水和人类活动因素,结合时间序列对比分析法和降水-输沙双累积曲线,定量计算出不同时段的输沙衰减量以及降水变化和水土流失治理导致的减沙量及其所占比重。分析表明:不同时段水土保持措施对秃尾河流域输沙变化的影响差异很大,流域20世纪70年代之后输沙衰减的主要驱动力是水土保持措施;水土保持措施对秃尾河流域7月、8月输沙量影响最大。
The effect of water and sediment research is an important theoretical foundation for the practice of the soil and water conservation planning and management.Based on the Tuwei river catchment＇s precipitation,runoff,sediment data,using Mann-Kendall rank correlation method and a total anomaly method to analyze the characteristics of water and sediment and its trends.Contrary to precipitation and human activities factors which affect water and sediment changes,using comparative analysis of time series and precipitation-sediment dual-accumulation curve to calculate sediment attenuation caused by precipitation change and soil erosion control during different times and their proportions.And so determine soil and water conservation measures on the impact of sediment discharge.Analysis showed that soil and water conservation measures on the impact of changes in river basin sediment very different in different time slots.Soil and water conservation measures is the main driving force of sediment attenuation in 20th century 70s.And the most obvious change occurred in July and August.
出处
《水土保持研究》
CSCD
北大核心
2010年第1期15-19,F0002,共6页
Research of Soil and Water Conservation
基金
中国科学院西部行动项目(KZCX2-XB2-05-03)
国家973项目(2007CB407203)
关键词
水土流失
水土保持
泥沙
秃尾河
黄土高原
soil and water erosion
soil and water conservation
sediment
Tuwei river
the Loess Pateau
