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[1]WANG Xuan,XU Lu,CHEN Wen-jing,et al.Stepwise Regression Analysis for Sediment Yield on Bare Slope under Natural Rainfall Condition[J].Research of Soil and Water Conservation,2012,19(01):117-120,124.

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Stepwise Regression Analysis for Sediment Yield on Bare Slope under Natural Rainfall Condition

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 01 Page number: 117-120,124 Column: Public date: 2012-02-20

Title:: Stepwise Regression Analysis for Sediment Yield on Bare Slope under Natural Rainfall Condition

Author(s):: WANG Xuan, XU Lu, CHEN Wen-jing, XIN Yan; College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China

Keywords:: sediment yield; stepwise regression analysis; impact factor; the biggest instantaneous rainfall intensity

CLC:: S157.1

DOI:: -

Abstract:: Occurrence of slope soil erosion is the result of a combination and interaction of vegetation, soil, precipitation, topography and other factors. Stepwise regression analysis method used in this article is intended to select the critical factor which impacts on soil erosion of Shenyang area, in order to provide guidance about production and practice for the people in Shenyang area. When there are a lot of independent variables, someone of them influence may be not evident and the variables may be not completely mutual independent, probably have a variety of interaction relationship. In this case we can use stepwise regression analysis method to screen out the impact factor and establish the optimal regression equation, the predicting result of such regression models will be more better than regular one. In order to determine impact factor of bare slope erosion under natural rainfall in this area, two slope gradients of 10°and 15° were used for test, five parameters including slope gradient, rainfall, rainfall intensity, the biggest instantaneous rainfall intensity and rainfall duration were adapted in stepwise regression analysis for sediment yield. The results indicated that the biggest instantaneous rainfall intensity, gradient and rainfall had appreciable impact on sediment yield. Sediment yield is linear with these variables.

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