基于GIS的济南市山丘区退耕还林还草决策分析

利用遥感和GIS技术，分析了济南市山丘区退耕还林还草的耕地数量及空间分布情况。通过对TM遥感影像的目视解译获得最新的土地利用数据，然后从土地利用数据中提取出旱地；利用地理信息系统的图层叠加功能，分析不同坡度、不同土壤侵蚀强度和不同土壤侵蚀危险度条件下的旱地面积及分布；结合研究区具体情况，制定退耕还林还草原则，最后提出济南市退耕还林还草方案。本研究可以为济南市的生态环境建设规划提供科学的决策依据。

Analysis on cultivated land in Jinan mountain area returned to forestland and grassland basing on GIS

In this paper,by using RS and GIS technology, the author discussed the area and distribution of cultivated land returned to forestland and grassland in Jinan mountain area.The studying method may be included as follows:First,the uthor gets the land use data by visual interpretation of TM images, and extracted the cultivated land from the data.Second,using the overlaying function of Geographic Information System (GIS),the author analysized the area and distribution of cultivated land under the condition of different slope, different soil erosion intensity and different soil erosion potential danger.Third, based upon specific condition of this region,the principles of returning cultivated land to forestland and grassland was set up.Based on these principles,the author gave the advice of cultivates land in Jinan mountain area returned to forestland and grassland.It shows that the research provides an scientific decision base for government to construct ecological environment in Jinan.