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《Journal of Beijing Forestry University》 2008-02
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Comparison of rainfall-runoff process in watersheds under different scales on the loess area in western Shanxi Province,northern China

ZHANG Jian-jun;DONG Huang-biao;NA Lei;WANG Peng.Key Laboratory of Soil & Water Conservation and Desertification Combating,Ministry of Education,School of Soil and Water Conservation,Beijing Forestry University,100083,P.R.China.  
Research on rainfall-runoff process in watersheds under different scales is essential to scale transform,which is one of the hotspots in the research field of hydrology.Based on field observation,runoff coefficient,runoff depth and flood hydrographs under different scales on the loess area were compared to provide useful information for the solution of scale transform.The results showed prominent variations in runoff coefficient and runoff depth in different scales.Rainfall intensity is the main factor influencing flood hydrograph.It is also indicated that flood hydrographs of different precipitation vary little under small scale but a lot under the large one.It is suggested that the key point to scale transform is quantifying the variation in land cover and landform as well as the spatial distribution of rainfall intensity,rainfall intensity-duration curve.
【Fund】: “973”国家重点基础项目(2002CB111503);; “十一五”国家支撑计划专题(2006BAD03A1204)
【CateGory Index】: S271
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