吉林省土壤侵蚀敏感性评价

以通用土壤流失方程(USLE)为理论基础,在GIS的支持下采用地图代数方法,对吉林省的土壤侵蚀敏感性进行影响因子的逐一评价和综合评价。针对吉林省土壤侵蚀的实际情况,借鉴国内外的相关研究成果,选择了降雨侵蚀力、地形起伏度、植被类型和土壤质地等4个因子。通过分析与综合评价,明确了吉林省土壤侵蚀发生的可能程度、地区范围和空间分布规律,并进一步探讨了针对不同土壤侵蚀敏感区的有效控制水土流失的对策。研究结果将为吉林省的生态环境分区管理,合理开发利用土地资源,有效控制土壤侵蚀的发生和发展提供重要的依据。

Assessment on Sensitivity of Soil Erosion in Jilin Province

Taken the Universal Soil Loss Equation(USLE) as a theory foundation, we used the map algebra method to assess one by one and evaluate synthetically on influence factors of the sensitivity of soil erosion under the support of GIS in Jilin Province. We classified influence of precipitation, soil, topography and vegetation upon factor of soil erosion into five different degrees. As a result, assessment map of each factor was finished. We also drew integrated assessment map of sensitivity of soil erosion by overlapping function with ArcGIS. Through analysis and assessment, it was made clear that possible level, area coverage and spatially distributional pattern of soil erosion sensitivity. Furthermore, the effective countermeasures controlling the soil erosion are discussed. The result will provide the important basis for the partition management of ecology environment, the reasonable use of land resources, effective control of soil erosion.