论文部分内容阅读
在全面总结以往研究方法的特点、系统分析黄河中游不同类型区坡面径流小区实测资料、深入研究水土保持措施减洪减沙机理的基础上，提出“以洪算沙频率分析法”及“成因分析自然相关法”两种建立黄河中游水土保持坡面措施减洪减沙指标体系的思路和方法。前者应用数理统计方法以代表小区洪水径流量、降雨量为统计量，建立不同洪量频率、不同雨量级下的措施减洪指标体系；以流域降雨量为纽带，消除时段、点面、地区等差异，推到流域面上。后者则通过对小区资料的地区综合相关分析，以代表小区产洪（ 沙） 量和措施减洪（ 沙） 量为相关因子，以措施质量分级指标为参变量，建立经验模型；通过对径流泥沙模数的修正，推算流域的措施减洪减沙指标。
This paper systematically analyzes the characteristics of past research methods, systematically analyzes the measured data of runoff plots in different types of areas in the middle reaches of the Yellow River, and deeply studies the mechanism of flood and sediment reduction by water and soil conservation measures. Analysis of Natural Relevant Law "two kinds of ideas and methods of establishing the indicator system of reducing flood and reducing sediment by soil and water conservation measures in the middle reaches of the Yellow River. The former applied mathematical statistics method to represent the district flood runoff and rainfall as the statistics, and established the flood reduction index system under different flood frequency and different rainfall levels. Using the rainfall as a link, the differences of time, point, and area were eliminated , Pushed to the basin surface. The latter through the district comprehensive correlation analysis of the district data to represent the district flood (sand) and the amount of flood control (sand) as the relevant factors, the measure of quality grading index as a parameter to establish empirical models; through the runoff Modification of sediment modulus, estimation of watershed measures to reduce flood and sediment indicators.