CAJ | 학술논문

应用地理信息影像化方法,从土壤侵蚀的影响因素出发,在ERDAS软件支持下,建立长江上游降雨侵蚀力、地形起伏、土壤可蚀性、植被覆盖信息的专题数字模型.在此基础上,进行综合分析得到土壤侵蚀敏感性指数影像化图,并探讨长江上游土壤侵蚀敏感性空间分异特征.研究表明,评价结果信息客观细致,适用于生态环境的综合评价;长江上游土壤侵蚀敏感性总体水平较高,中度敏感和高度敏感面积占总面积82.8%;长江上游土壤侵蚀敏感性空间分异显著.
응용지리신식영상화방법,종토양침식적영향인소출발,재ERDAS연건지지하,건립장강상유강우침식력、지형기복、토양가식성、식피복개신식적전제수자모형.재차기출상,진행종합분석득도토양침식민감성지수영상화도,병탐토장강상유토양침식민감성공간분이특정.연구표명,평개결과신식객관세치,괄용우생태배경적종합평개;장강상유토양침식민감성총체수평교고,중도민감화고도민감면적점총면적82.8%;장강상유토양침식민감성공간분이현저.
Thematic digital model of influencing factors of soil erosion such as rainfall erosivity,terrain rise, soil erodibility and vegetation cov-er information in the upper reaches of the Yangtze River was built up in EBDAS using the imagewise method of geographic information. The imagewise map of soil erosion sensitivity index was created and the spatial differentiation characteristics of soil erosion sensitivity in the upper reaches of the Yangtze River was discussed based on the comprehensive analysis of the thematic digital model. Results show that, the output of the evaluation is objective and detailed which is suitable for the comprehensive analysis of the ecological environment. The overall soil ero-sion sensitivity in the upper reaches of the Yangtze River is at a high level. The area with a medium and high sensitivity accounts for 82.8% of the total area. And there is significant spatial differentiation in the soil erosion sensitivity in the upper reaches of the Yangtze River.