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[1]DENG Wen-ping,LI Hai-guang,YU Xin-xiao,et al.Influence of the Change of Land Use/Land Cover and Precipitation Variation on Runoff and Sediment Transport in LÜergou River Watershed on the Loess Plateau[J].Research of Soil and Water Conservation,2011,18(04):226-231.

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Influence of the Change of Land Use/Land Cover and Precipitation Variation on Runoff and Sediment Transport in LÜergou River Watershed on the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 04 Page number: 226-231 Column: Public date: 2011-08-20

Title:: Influence of the Change of Land Use/Land Cover and Precipitation Variation on Runoff and Sediment Transport in LÜergou River Watershed on the Loess Plateau

Author(s):: DENG Wen-ping¹, LI Hai-guang¹, YU Xin-xiao¹, ZHAO Yang¹, WANG He-nian¹, XU Feng²; 1. Key Laboratory of Soil and Water Conservation & Combating Desertification of Ministryof Education, School of Water and Soil Conservation, BFU, Beijing, 100083, China;
2. Tianshui Soil and WaterConservation Science Experiment Station, Yellow River Conservancy Commission, Tianshui, Gansu 741000, China

Keywords:: land use/land cover; climate variability; runoff; sediment transport

CLC:: P332.5;F301.24

DOI:: -

Abstract:: In order to study the coupling effects of land use/land cover and climate variability on runoff and sediment transport, LÜergou watershed was taken as an example and the trend of annual streamflow and sediment transport in period of 1982-2010 were examined. By using the nonparametric Mann-Kendall test and the change of annual streamflow and sediment discharge in different period were analyzed. In addition, the contributions of landuse and climate variability period to runoff and sediment yield were assessed. The results showed that: (1) The reduction of streamflow and sediment transport in unremarkable variation period was less than in remarkable period; (2) In unremarkable variation period, the estimated streamflow reduction from 1987-1991 was attributable to landuse change (59.01%) and climate change (40.98%), so, the streamflow reduction was mainly due to the change of landuse;the reduction of mean annual sediment yield by 13.80 thousand ton, the climate variability caused the reduction of mean annual sediment yield by 8.10 thousand ton; (3) In remarkable variation period, we estimated that streamflow reduction from 1991-2010 was attributable to landuse change (34.43%) and climate change (65.57%), the landuse caused the reduction of mean annual sediment yield by 48.00 thousand ton, the climate variability caused the reduction of mean annual sediment yield by 43.70 thousand ton; (4) The effects of landuse on runoff and sediment transport gradually decreased, while the effects of climate variability gradually increased.

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