西南林业大学学报2017，Vol.37Issue(2)：122-127,6.DOI:10.11929/j.issn.2095-1914.2017.02.020
黔北浒洋水侵蚀性次降雨对地表径流产沙的影响
Effects of Erosive Single Rainfall on Surface Runoff Sediment Yield in Huyangshui in Northern Region of Guizhou Province
摘要
Abstract
The relationship between sediment yield and erosive rainfall was studied based on the observed rainfall data of Huyangshui water and soil conservation monitoring stations in Zunyi from 2009 to 2012.The rainfall runoff erosion and sediment yield of small watershed in Huyangshui were analyzed using single rainfall erosivity,and the coverage of the optimal calculation model and multivariate nonlinear regression method with the data statistics of 4 runoff plots in the 28 times rainfall including rainfall,rainfall intensity,maximum 30 minutes rainfall intensity and time of rainfall erosion modulus.The results showed that the output of total runoff and sediment accounted for 64.05％ and 62.62％ respectively of the annual total from May to July in the basin.When rainfall erosivity was less than 20,the rainfall erosion modulus and rainfall erosivity was a positive correlation in power function,the rainfall erosion modulus and coverage was a negative correlation in quadratic function.When rainfall erosivity was more than 20,rainfall erosion modulus and the erosivity was positively in a function,the rainfall erosion modulus and coverage was negatively related to the power function relationship.The applicable formula among single rainfall erosivity,coverage and erosion modulus was established and verified through the binary nonlinear regression.关键词
降雨/产沙/侵蚀模数/降雨侵蚀力/覆盖度/遵义浒洋水Key words
rainfall/sediment yield/erosion modulus/rainfall erosivity/coverage degree/Huyangshui in Zunyi分类
农业科技引用本文复制引用
黄选华,高华端,罗金,孙泉忠..黔北浒洋水侵蚀性次降雨对地表径流产沙的影响[J].西南林业大学学报,2017,37(2):122-127,6.基金项目
贵州省喀斯特生态与环境专业学位研究生工作站项目(黔教研合JYSZ字[2014] 003)资助 （黔教研合JYSZ字[2014] 003）
贵州省水利厅水利科技经费项目(KT201311)资助 （KT201311）
贵州省水利厅水利科技经费项目(KT201202)资助. （KT201202）
