译 名：
Several Problems Worth Paying Attention in Analysis of the Benefit of Sediment Reduction of Water Con-servancy and Soil Conservation Measures in the Middle Yellow River
作 者：
Zhao Wenlin et al
(Hydraulic Research Institute of YRCC, Zhengzhou)
关键词：
measures of water conservancy and soil conservation benefit of sediment reduction rainstorm runoff sediment yield the middle Yellow River
摘 要：
The variation of river sediment load is considerably affected by rainfall and underlying surface. When hydrologfe method is used in making analysis of the benefits of sediment reduction of soil conservation measures, the following problems should be paid attention to: Rainfall is the most Important basic data, so we should make serious analysis of the distribution of rainfall stations, representativeness and the comparison of rainfall before and after project construction. Intense rainfall has great influence on sediment yield and rainstorm intensity is an important decisive parameter of sediment load, therefore we should select effective rainfall and rainstorm intensity to betterty reflect the effects of rainstorm in sediment yield. When runoff is used to forecast sediment yield, the different affects of underground and surface water should be differentiated. The affects of different types of geomorphy on sediment yield should also be taken into consideration.
