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[1]LU Long-bin,FU Qiang,HUANG Jin-bai.Runoff Conditions and Runoff Coefficient of the Wind-water Erosion Crisscross Region on the Northern Loess Plateau[J].Research of Soil and Water Conservation,2013,20(04):17-23.

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Runoff Conditions and Runoff Coefficient of the Wind-water Erosion Crisscross Region on the Northern Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 04 Page number: 17-23 Column: Public date: 2013-08-28

Title:: Runoff Conditions and Runoff Coefficient of the Wind-water Erosion Crisscross Region on the Northern Loess Plateau

Author(s):: LU Long-bin, FU Qiang, HUANG Jin-bai; College of Water Conservancy and Architecture, Northeast Agricultural University, Harbin 150030, China

Keywords:: Loess Plateau; wind-water erosion crisscross; rainfall-runoff process; numerical calculation; runoff conditions; runoff coefficient

CLC:: P333

DOI:: -

Abstract:: With an aim to estimate runoff conditions and runoff coefficient, to provide the basis for further studies on surface water resources at the wind-water erosion crisscross region on the northern Loess Plateau, a catchment known as Liudaogou which has representative hydrological and meteorological characteristics of the wind-water erosion crisscross region on the Loess Plateau was chosen as the study site. Runoff conditions were clarified through analysis of the observed rainfall-runoff data. When a long duration with low intensity rainfall occurred, the necessary condition for runoff generation was the topsoil (thickness: 5—10 cm) attained saturation and rain intensity ≥0.12 mm/min; when a short duration with high intensity rainfall occurred, the necessary condition for runoff generation was rain intensity≥0.52 mm/min; runoff ratio was proportion to the average rain intensity; a numerical model for rainfall-runoff has been developed for the study site based on kinematic wave theory combining with GIS and its error in numerical calculation is less than 3%. Average runoff coefficient for five years (2005—2009) was estimated to be 0.11 based on which the annual mean runoff coefficient was approximately estimated as 0.10~0.15.

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