The development of land quality indicators for soil degradation by water erosion

被引:66
作者
Kirkby, MJ [1 ]
Le Bissonnais, Y
Coulthard, TJ
Daroussin, J
McMahon, MD
机构
[1] Univ Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England
[2] INRA, F-45166 Olivet, France
[3] Univ Wales, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales
关键词
soil erosion; land degradation; regional modelling; indicators;
D O I
10.1016/S0167-8809(00)00186-9
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The paper describes a proposed methodology for estimating water erosion risk for large areas. The estimates are based on a one-dimensional hydrological balance and a physically based sediment transport model. Estimates of risk associated with a given storm amount are integrated over the frequency distribution of daily rainfalls to provide a properly weighted estimate of the average annual risk. Soil factors are estimated from textural classes using qualitative pedo-transfer functions. Climatic data are taken from interpolated gridded data. Topographic data are taken from global or local DEMs. The estimates are for sediment delivery to stream channels. The method has been applied to provide a preliminary estimate for France at a resolution of 250 m, and could be applied globally at a resolution of 1 km. (C) 2000 Published by Elsevier Science B.V.
引用
收藏
页码:125 / 136
页数:12
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