Authors: ZHAO Yong ^{1, 2}, PEI Yuan-shen ¹, ZHAI Zhi-jie ¹

1. China Institute of Water Resources and Hydropower Research, Beijing 100038, China
2. State Key Laboratory of Simulation and Regulation of River Basin Water Cycle, Beijing 100038, China

Abstract: Soil moisture is an important factor influencing soil wind erosion, and the effects of agricultural water saving on soil erosion become an important indicator for the evaluation of water saving in river basins. Based on the distributed simulation model for water resources allocation and water cycle (WACM) suggested by the authors, a distributed simulation model of soil wind erosion is developed, which can be used to simulate the process of soil wind erosion continuously day by day. Furthermore, the model can be used to simulate not only the existing regional soil wind erosion process but also under the effects of climate change, water supply and use as well as the farming activities of human beings. The model was adapted to the inversion of a 15 year process (1991-2005) of soil wind erosion in the Tuhaimajia River Basin. The simulation results show that the average soil wind erosion modulus of 15 years is 1.217kg/ (m².a), i.e., the river basin as a whole has slight soil erosion, but soil wind erosion is very serious in some years and in some areas of the river basin. The soil wind erosion in 1991 is at a moderate level, and the average soil wind erosion is also at a moderate level in some areas such as the Xiajin regions in Shandong Province. Quantitative soil wind erosion analysis is preliminarily done on the effects of large-scale application of water saving measures in basin scale. It shows that intensive water saving exerts slight effects on the over all situation of soil wind erosion in the river basin, but produces significant effects in some areas.

Key words: soil wind erosion, distributed simulation, Tuhaimajia river basin, WACM model

Published in: Journal of Hydraulic Engineering, Vol. 42, No. 5, 2011
Article ID: 0559-9350 (2011) 05-0554-09