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[1]ZHU Jing,ZHAO Wen-wu,XU Hai-yan.The Scale Effects of Runoff-Sediment Correlations in the Hilly and Gully Area of the Loess Plateau[J].Research of Soil and Water Conservation,2008,15(03):4-6.

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The Scale Effects of Runoff-Sediment Correlations in the Hilly and Gully Area of the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 03 Page number: 4-6 Column: Public date: 2008-06-20

Title:: The Scale Effects of Runoff-Sediment Correlations in the Hilly and Gully Area of the Loess Plateau

Author(s):: ZHU Jing², ZHAO Wen-wu^1,2, XU Hai-yan²; 1. Key Laboratory of Land Use, Ministry of Land and Resources, Beijing 100035, China;
2. College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China

Keywords:: hilly and gully area of the Loess Plateau; runoff; sediment; correlations; model

CLC:: S157.1

DOI:: -

Abstract:: In order to explore the scale effects of correlations between runoff and sediment in the hilly and gully area of the loess plateau,this paper took the Yanhe watershed,Qingjianhe watershed and Fenchuanhe watershed in northern of Shaanxi province as a case study,and analyzed the relationship between the monthly runoff volume and sediment discharge rate from 15 years in 9 hydrological stations.It is implied from the analysis result that the correlation coefficient of runoff and sediment varies for different time scales and spatial scales.And the goodness of fitting models for runoff and sediment changes with scale alteration.At for time scale,the fitting goodness of models in July and August are higher than that in June and September,and the flood seasons are better than that of July and August.As for the spatial scale,the fitting goodness of model for Qingjianhe watershed is better than that for Yanhe watershed and Fenchuanhe watershed;the regional models is better than that for Yanhe watershed and Fenchuanhe watershed,and worse than that for Qingjianhe watershed.

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