| 紫色土小流域土壤流失对不同土地利用类型的响应 |
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| 引用本文： | 韩建刚,李占斌.紫色土小流域土壤流失对不同土地利用类型的响应[J].中国水土保持科学,2005,3(4):37-41. |
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| 作者姓名： | 韩建刚 李占斌 |
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| 作者单位： | 1. 西北农林科技大学资源环境学院,712100,陕西杨凌;江苏大学生物与环境工程学院,212013,江苏镇江
2. 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,712100,陕西杨凌 |
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| 基金项目： | 国家自然科学基金项目（40371075）;中欧合作研究项目（ER0CHiNub-ERBIC18CT980372）笔者在稿件中采用了合作项目的部分共享数据.对中国科学院水利部水土保持研究所田均良研究员,中国科学院南京土壤研究所曹志洪、史学正研究员,四川省农业科学院陈一兵、林超文研究员以及其他参与人员表示诚挚的谢意. |
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| 摘 要： | 小流域土壤流失特征不仅反映了流域的土地利用和管理状况,而且对其下游水体环境和水利设施安全具有深刻的影响。1999—2000年间以紫色土区3个具有不同集水面积、物理特征和土地利用类型的典型小流域为研究对象,探讨不同雨型下土壤流失对不同土地利用类型的响应特征。中大型降雨和间歇型降雨侵蚀下,以林地为主要土地利用类型的流域输沙模数最小,平均为866kg·hm-2,谷地农田利用类型最高,平均为5 550kg·hm-2。次降雨侵蚀力和次降雨峰值径流流量,分别是紫色土区非林地和林地利用为主小流域输沙模数变异的主要影响因子。
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| 关 键 词： | 紫色土 土地利用 输沙模数 |
| 收稿时间： | 2005-03-06 |
| 修稿时间： | 2005-05-09 |
Response of soil loss to different land use types in small watersheds of purple soil |
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| Han Jiangang,Li Zhanbin.Response of soil loss to different land use types in small watersheds of purple soil[J].Science of Soil and Water Conservation,2005,3(4):37-41. |
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| Authors: | Han Jiangang Li Zhanbin |
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| Institution: | 1.College of Resources and Environment Science, Northwest A&;F University, 712100, Yangling, Shaanxi;2.College of Biology and Environment Engineering, Jiangsu University, 212013, Zhenjiang, Jiangsu; 3.Institute of Water and Soil Conservation, Chinese Academy Science and Ministry of Water Resources, Slate Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, 712100, Yangling, Shaanxi: China |
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| Abstract: | Soil erosion characteristics of small watersheds not only reflect land use and management condition of watersheds, but also determine the safety of water body environment and water conservancy establishment in the lower reaches of river. Three small watersheds with different catchments area, physical characteristics and land use type were employed to investigate the responding characteristics of soil erosion under different storm types and land use types from 1999 to 2000 in the purple soil area. Results showed that the sediment transport modulus over the woodland-dominated watershed is the least under the erosion of ML-type precipitation and IM-type precipitation. The average modulus is 866 kg·hm-2. In contrast, the modulus over the farmland - dominated watershed is the highest with a mean modulus of 5 550 kg·hm-2. In addition, the total rainfall erosive factor and the total peak flow amount were proved to be the main influential factors of the variation of the sediment transport modulus for watersheds with various landscape structures and farmland-dominated landscapes, and woodland - dominated watersheds, respectively. |
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| Keywords: | purple soil land use sediment transport modulus |
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