| 沙漠与沙漠化 |
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| Estimation of Soil Erosion Quantity in Semi-arid Steppe Region with Remote Sensing Technologies and 137Cs Measurements |
| SHA Zhan-jiang1,2, MA Hai-zhou1, LI Ling-qin2 , FAN Qi-shun1, WU Fei-quan1 |
| 1.Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China; 2.Department of Geography, Qinghai Normal University, Xining 810008, China |
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Abstract Soil wind erosion is the most important course of earth surface change in semi-arid area. The soil erosion quantity of a experimental region in Talatan of Gonghe basin, Qinghai province, is estimated with integrated technologies of remote sensing and geochemistry radioactivity isotope. The results show that the soil wind erosion is not intensive in this region; most belong to the very light and light types, accounting for 47.12% and 35.58% of the study total area respectively, and the erosion modulus is about 220.28~580.13 t·km-2·a-1; only small area of near 22.14 km2 belong to severe erosion and very severe erosion types. Also, there is intense deposition course in this region, its area is 322.67 km2, accounting for 11.78% of the study area. For the whole study area the total soil erosion per year is 870 000 to 1 150 000 ton, and the deposition is 550 000 to 780 000 ton. The transportation of soil from Talatan to Longyangxia reservoir per year is about 320 000~370 000 ton.
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Received: 06 March 2008
Published: 20 July 2009
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2009, Vol. 29 
