| 基于3S技术的小流域水土流失过程数值模拟与定量研究 |
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| 引用本文： | 万晔,段昌群,王玉朝,王学林,王建萍.基于3S技术的小流域水土流失过程数值模拟与定量研究[J].水科学进展,2004,15(5):650-654. |
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| 作者姓名： | 万晔 段昌群 王玉朝 王学林 王建萍 |
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| 作者单位： | 1.云南大学生命科学院及云南省生物资源保护与利用重点实验室, 云南, 昆明, 650091; |
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| 基金项目： | 国家攀登计划项目(2000 026)，云南省自然科学基金资助项目(2002C0015R，2001C0002P)~~ |
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| 摘 要： | 运用3S技术和不同水蚀区修正的土壤流失方程,对金沙江流域龙川江上游的水土流失量和需要治理的面积进行了数值模拟和定量研究.结果表明:①旱年1998年土壤流失总量为840069.19t,流失总面积为2293.7841km2;涝年1999年土壤流失总量为8690182.6t,流失总面积为2293.7841km2;1999年和1998年强度、重度和剧烈以上流失面积分别达85%和66.8%,该项指标1999年明显强于1998年.②从流失面积来看,1999年中度以上流失面积占流失总面积的35.2%,而1998年只占26%.③1988年和1999年防治强度分级中急需治理和需要治理的面积占总面积的比例分别为16.27%和14.63%.④模拟计算结果与实测值接近,说明该方法对西南红壤季风区的水土流失定量监测与分析具有准确、实用和方便的特点.
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| 关 键 词： | 水土流失 遥感 地理信息系统 小流域 长江上游 数值模拟 |
| 文章编号： | 1001-6791(2004)05-0650-05 |
| 收稿时间： | 2003-03-10 |
| 修稿时间： | 2003年3月10日 |
Numerical model and quantitative analysis of soil and water erosion process in the small watershed based on 3S technology |
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| WAN Ye.Numerical model and quantitative analysis of soil and water erosion process in the small watershed based on 3S technology[J].Advances in Water Science,2004,15(5):650-654. |
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| Authors: | WAN Ye |
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| Affiliation: | 1.College of Life Science & Key Laboratory of Biological Resources Conservation & Utilization of Yunnan Province, Yunnan University, Kunming 650091, China;2.College of Resources & Environment, Yunnan University, Kunming 650223, China |
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| Abstract: | Based on the 3S technology and the soil erosion equation revised by us,the soil loss amount and areas to be harnessed in the upstream of Longchuanjiang River of the Yangtze River were numericaly simulated and quantitatively analyzed.The calculated results are as following:(1) The soil erosion amount in 1998(drought year) was 840069.19 t,the erosion area was 2293.7841 km2,the soil erosion amount in 1999(water-logged year) was 8 90 182.6 t,the erosion area was 2 293.784 1 km2,the sum of the strong,heavy and violent erosion areas in 1999 were obviously stronger than that of 1998.(2) Soil erosion area over middle degree in 1999 was 35.2% of total area,meanwhile it was 26.0% in 1998.(3) The areas to be managed rapidly in classification sizes of prevention strength in 1999 and 1998 respectively occupied 16.27% and 14.63% of the watershed area.(4) The modeled results are similar to the observation value on the spot,which indicats that the method can be applied to soil erosion research of the red earth and monsoon region of Southwest China and it is accurate,convenient and practical. |
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| Keywords: | soil and water erosion process remote sensing geographic information system small watershed upstream of Yangtze River numerical simulation |
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