| 陕北黄土丘陵区乡村聚落土壤水蚀观测分析 |
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| 引用本文： | 甘枝茂,岳大鹏,甘锐,查小春.陕北黄土丘陵区乡村聚落土壤水蚀观测分析[J].地理学报,2005,60(3):519-525. |
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| 作者姓名： | 甘枝茂 岳大鹏 甘锐 查小春 |
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| 作者单位： | 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;水利部黄委会科研项目 |
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| 摘 要： | 通过2004年6月至10月,在陕北对降雨形成的乡村聚落土壤侵蚀的定位观测,其结果表明:①乡村聚落的平均径流系数为0.335,其中延安最大,为0.44;榆林和绥德较小,分别为0.293、0.272。同时,道路和庭院的径流系数较大,分别为0.39、0.377,户间空地较小,为0.277;②径流平均含沙量以户间空地最大(52.54g/l),次为户间道路(41.42g/l),而院落径流含沙量较小(17.78g/l);③乡村聚落的平均侵蚀强度为5434.3t/km2,已达强度级侵蚀,其中户间道路、户间空地侵蚀较大,分别为7348t/km2、6873t/km2,庭院相对较小,为2081.7t/km2;④乡村聚落土壤侵蚀的变化,受人为影响更加突出。说明黄土高原乡村聚落土壤侵蚀较严重,并且具有特殊性,不可忽视,应加强研究和防治。
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| 关 键 词： | 陕北 黄土丘陵区 乡村聚落 土壤水蚀 观测与分析 |
| 收稿时间： | 2004-02-26 |
| 修稿时间： | 2004年2月26日 |
Field Survey on Water Erosion of the Rural Settlements in the Loess Hilly-gully Area of Northern Shaanxi Province |
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| GAN Zhimao,YUE Dapeng,GAN Rui,ZHA Xiaochun.Field Survey on Water Erosion of the Rural Settlements in the Loess Hilly-gully Area of Northern Shaanxi Province[J].Acta Geographica Sinica,2005,60(3):519-525. |
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| Authors: | GAN Zhimao YUE Dapeng GAN Rui ZHA Xiaochun |
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| Institution: | College of Tourism and Environment Science, Shaanxi Normal University, Xi'an 710062, China |
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| Abstract: | After observing the soil erosion of rural settlements formed by rainfalls (water erosion) based on field survey in northern Shaanxi province, this paper draws the following conclusions. (1) The average runoff coefficient of rural settlements is 0.335. The maximum runoff coefficient is 0.44, which exists in Yan'an county. The runoff coefficient in Yulin city and Suide county is 0.293 and 0.272 respectively, relatively small. Among the land-use types of rural settlements, the runoff coefficient of road land and yard is greater (separately 0.39 and 0.377), and the runoff coefficient of open space between houses is smaller (0.277). (2) The average runoff-contained sediment amount of open space between houses is the greatest (52.54 g/L), that of settlement yards is the smallest (17.19 g/L), and that of road land is placed in the middle (41.42 g/L). (3) The average erosion intensity of the rural settlements in northern Shaanxi Provence is 5434 t/km2·a, falling into the category of severity erosion. The erosion intensity of road land and open space between houses is respectively 7348 and 6873 t/km2·a, greater than that of the settlement yard (2081.7 t/km2·a). (4) The change of soil erosion of rural settlements is affected more prominently by human activities. It concludes that soil erosion of rural settlements on the Loess Plateau is quite severe and has its particularity. Therefore it can not be ignored and must be paid attention to its research and prevention. |
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| Keywords: | Shaanxi Province loess hilly-gully area rural settlements water er osion of soil |
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