| 黄土丘陵区典型峁坡土壤侵蚀空间分异特征 |
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| 引用本文： | 刘佳鑫,刘普灵,刘栋,张宁宁.黄土丘陵区典型峁坡土壤侵蚀空间分异特征[J].水土保持通报,2014(4):1-4,10. |
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| 作者姓名： | 刘佳鑫 刘普灵 刘栋 张宁宁 |
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| 作者单位： | 西北农林科技大学水土保持研究所, 陕西杨凌 712100;西北农林科技大学水土保持研究所, 陕西杨凌 712100;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100;重庆水利电力职业技术学院, 重庆 402160;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100 |
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| 基金项目： | 国家自然科学基金项目"黄土丘陵区近十年来典型流域侵蚀环境演变的泥沙响应"(41371281) |
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| 摘 要： | 选择黄土高原丘陵沟壑区典型峁坡,采用137 Cs示踪技术,通过对不同坡向和坡位土样137 Cs含量的测定,分析了峁坡137 Cs空间分布特征及土壤侵蚀的空间分异。结果表明,不同坡向峁坡侵蚀差异明显,各坡向平均侵蚀速率大小依次为:北坡西南坡东北坡西坡西北坡南坡东南坡东坡,各坡向侵蚀强度均表现为强度侵蚀;峁坡各坡向不同坡位的侵蚀差异也非常明显,坡下部侵蚀量最大,坡面中上部次之。侵蚀速率顺坡呈波动变化趋势,且侵蚀强度表现为中度、强度以及极强度侵蚀,以强度侵蚀为主。
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| 关 键 词： | 黄土峁坡 137Cs示踪 坡向 坡位 土壤侵蚀 |
| 收稿时间： | 2013/3/26 0:00:00 |
| 修稿时间： | 4/9/2014 12:00:00 AM |
Spatial Differentiation of Soil Erosion on Typical Loess Hill Slope in Loess Hilly and Gully Region |
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| LIU Jia-xin,LIU Pu-ling,LIU Dong and ZHANG Ning-ning.Spatial Differentiation of Soil Erosion on Typical Loess Hill Slope in Loess Hilly and Gully Region[J].Bulletin of Soil and Water Conservation,2014(4):1-4,10. |
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| Authors: | LIU Jia-xin LIU Pu-ling LIU Dong and ZHANG Ning-ning |
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| Institution: | Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, CAS, Yangling, Shaanxi 712100, China;Chongqing Water Resources and Electric Engineering College, Chongqing 402160, China;State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, CAS, Yangling, Shaanxi 712100, China |
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| Abstract: | The spatial distribution of 137Cs and the spatial differentiation of soil erosion on typical loess hill slope in the loess hilly and gully region was analyzed by using 137Cs tracer technique to determine the content of 137Cs in different slope aspect positions. The results showed that there were obvious differences of erosion between different slope aspects. The order of the average erosion rate was as follows: north slope > southwest slope > northeast slope > west slope > northwest slope > south slope > southeast slope > east slope and all the slopes were characterized by strong erosion. Moreover, the erosion rates in different slope positions of the same slope aspect showed significant differences, the erosion amount in lower part of the slope was the maximum and less in the upper slope. Overall, the erosion rate showed a trend of fluctuations along the slope, and the erosion intensity was mainly characterized by medium, strong and extremely strong and most of them was strong. |
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| Keywords: | loess hill slope 137Cs tracer technique aspect slope positions soil erosion |
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