| 元代以来黄土塬区沟谷发育与土壤侵蚀 |
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| 引用本文： | 桑广书,甘枝茂,岳大鹏.元代以来黄土塬区沟谷发育与土壤侵蚀[J].干旱区地理,2003,26(4):355-360. |
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| 作者姓名： | 桑广书 甘枝茂 岳大鹏 |
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| 作者单位： | 1. 浙江师范大学旅游与资源管理学院,金华,321004
2. 陕西师范大学旅游与环境学院,西安,710062 |
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| 基金项目： | 国家自然科学基金项目 (5 0 2 790 19) |
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| 摘 要： | 以洛川旧县镇南沟小流域为研究对象，用实地考察和史料考证相结合的方法，恢复了元代(1267年)以来洛川黄土塬区沟谷发育与土壤侵蚀过程，计算出了不同时段沟谷发育速度、土壤侵蚀强度，分析了黄土塬区沟谷形态的演变。自元代以来黄土塬区沟谷发育、土壤侵蚀呈加剧态势，其变化一方面与降水量变化关系密切，降水量较丰富时沟谷发育、土壤侵蚀较强；另一方面人为加速侵蚀与自然侵蚀相叠加是近现代沟谷发育、土壤侵蚀剧烈的主要原因。黄土塬区沟谷形态由巷形谷、V形谷向U形谷演变，沟头段巷形谷和上游段V形谷是土壤侵蚀与治理的重点。
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| 关 键 词： | 元代 黄土塬 沟谷发育 土壤侵蚀 |
| 文章编号： | 1000-6060(2003)04-0355-06 |
| 修稿时间： | 2003年3月10日 |
Gully Development and Soil Erosion in the Loess Yuan Region since Yuan Dynasty |
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| SANG Guang shu ,GAN Zhi mao ,YUE Da peng.Gully Development and Soil Erosion in the Loess Yuan Region since Yuan Dynasty[J].Arid Land Geography,2003,26(4):355-360. |
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| Authors: | SANG Guang shu GAN Zhi mao YUE Da peng |
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| Institution: | SANG Guang shu 1,GAN Zhi mao 2,YUE Da peng 2 |
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| Abstract: | Gully is the main region of soil erosion, in the meantime, it is also the main expression of loess landform evolution in the Loess Yuan Region. Taking Jiuxian Town as an example, this paper recovers the processes of gully development and soil erosion of the Loess Yuan Region in Luochuan County since Yuan Dynasty (A.D.1267). Both the on the spot investigation and the textual research method are applied. The paper calculates the gully development speed and the soil erosion intensity in different historic periods. The evolution processes of gully in the Loess Yuan Region are also analyzed. Since Yuan Dynasty, gully development speed and soil erosion intensity have the trend of aggravation. In the period when precipitation is comparatively rich, the gully development speed and soil erosion intensity are comparatively strong. It is the principal reason why natural erosion and man made erosion lead to gully development and soil erosion violently since modern and contemporary age. Landform evolution process of gully is from the bystreet shaped then to the V shaped, finally to the U shaped. The bystreet shaped and V shaped gullies are the key sections of soil erosion and water conservation in the Loess Yuan Region. |
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| Keywords: | the Loess Yuan Region gully development soil erosion Yuan Dynasty |
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