| 基于~(137)Cs示踪法的丹江口小流域农用地土壤侵蚀研究 |
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| 引用本文： | 张利华,李辉,张艳艳.基于~(137)Cs示踪法的丹江口小流域农用地土壤侵蚀研究[J].地理科学,2009,29(2). |
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| 作者姓名： | 张利华 李辉 张艳艳 |
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| 作者单位： | 中国地质大学地球科学学院,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金，湖北省地球表层系统重点实验室开放基金 |
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| 摘 要： | 运用137Cs示踪技术,采用相关土壤侵蚀定量估算模型,探讨丹江口市小流域不同土地利用方式和土壤类型的土壤侵蚀状况.结果表明:研究区137Cs本底值为2 153.46 Bq/m2;耕作土剖面中137Cs呈均一分布,非耕作土剖面中137Cs呈指数递减分布;不同土地利用方式下农用地土壤侵蚀速率从大到小依次为沟谷旱地坡耕地菜田水田草地;不同土壤类型结合不同地貌形态呈现不同的侵蚀速率,依次为低山丘陵区的石灰土粘质的黄棕壤土紫色土和砂质潮土;坡耕地的土壤侵蚀呈现垂直分异特征.
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| 关 键 词： | 137Cs示踪技术 土壤侵蚀 农用地 丹江口 |
Evaluation of Soil Erosion Rate in Danjiangkou City Using ~(137)Cs Tracing Method |
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| ZHANG Li-hua,LI Hui,ZHANG Yan-yan.Evaluation of Soil Erosion Rate in Danjiangkou City Using ~(137)Cs Tracing Method[J].Scientia Geographica Sinica,2009,29(2). |
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| Authors: | ZHANG Li-hua LI Hui ZHANG Yan-yan |
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| Institution: | Faculty of Earth Sciences;Geosciences University of China;Wuhan;Hubei 430074 |
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| Abstract: | Danjiangkou Reservoir is the catchment area for the South-to-North Water Transfer(middle line) Project in China.Danjiangkou City is the main part of Danjiangkou Reservoir area,water surface area in this city accounts for 45% of the total Danjiangkou Reservoir water area.Cesium-137(137Cs) with a half-life of 30.17 years is a man-made product resulting from thermonuclear weapon testing from the 1950s to 1970s.After reaching the soil surface,137Cs fallout can be adsorbed strongly and rapidly by soil organic ma... |
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| Keywords: | 137Cs tracer method soil erosion agricultural land Danjiangkou City |
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