纸坊沟流域近50年水沙特性及其变化研究

为了深入探讨黄土高原沟壑地区小流域水沙运动的基本规律和特点，采用平凉市纸坊沟流域50 a的降水、径流、泥沙观测资料和成果，建立数据库，采取数理统计、矩阵计算、分段对比、相关分析等方法对黄土高原沟壑区典型小流域纸坊沟流域的水沙特性及水土流失特点进行研究，分析了流域降水、径流、泥沙基本特性及其变化特点，特别是三者的变化趋势及其成因，为相近小流域水沙分析和水土流失治理提供一些基础依据。本文从其研究成果中提炼出了纸坊沟流域的水沙特性及其变化趋势和变化成因，以与广大水土保持工作者进一步探讨分析。

Characteristics of Rainfall and Silt and Its Changes during 50 Years in Zhifang Gully Small Watershed

Taking the Zhifang gully small watersheds as an example, this paper aims to further deeply study the basic regulations and characteristics on runoff and silt in some small watersheds in Loess plateau area on the basis of observed data of 50 years of precipitation, runoff and silt as well as research achievement, by ways of d-base establishment, analysis, calculation, partly comparing and related analysis, particularly in change tendency and its reason among precipitation, runoff and silt. We hope that the results can be used as basic reference to runoff and silt analysis and soil loss control, and also to be shared with our colleagues.