济南市南部山区退耕还林还草决策的影响分析  

Impact Analysis on Decision of Converting Cultivated Land into Forestland/Grassland in the Southern Mountain Region of Jinan

作　　者：王立红[1] 苗荣花[1] 张慧[1] 

机构地区：[1]山东师范大学人口资源与环境学院,山东济南250014

出　　处：《太原师范学院学报（自然科学版）》2011年第4期122-126,共5页Journal of Taiyuan Normal University:Natural Science Edition

摘　　要：在自然条件中主要是研究基于DEM数据的坡度和坡向对于退耕的影响,一方面在Arcview中分析林地、草地、园地、耕地在0°～6°,6°～15°,15°～25°,≥25°坡度的分布,并且主要分析了林地和耕地相互转化在不同坡度的分布,得出林地转化为耕地和耕地转化为林地的面积差一直在增大,因此要退耕还林,首先要退耕大于等于25°的坡耕地;另一方面在Arcview中分析林地、草地在阳坡、半阳坡、阴坡、半阴坡的分布,得出在林地转为耕地主要集中在阴坡和半阴坡,草地转为耕地要比耕地转为草地的面积要多,并且阳坡和半阳坡的比例要大.In the natural conditions,the reserch is mainly about the influence on converting cultivated land exerted by slope and aspect based on DEM data： on the one hand,distribution of woodland,grassland,garden-plot,cultivated land when the slope is 0°~6°,6°~15°,15°~25°,≥25° by Arcview,and it is known that the gas of mutual conversion of forest land and cultivated land has been increasing by mainly analyzing these distribution in different slopes,so cultivated land must be converted into forestland and the cultivated land must firstly be converted whose slope is greater than 25°;On the other hand,by analyzing the distribution of woodland and grassland in sunny,semi-sunny,shady and half-shady slope with Arcview,it is also known the woodland who should convert to cultivated land mainly concentrate in the shady and semi-shady slope,and the area that grassland converts into cultivated land are more than that cultivated land into grassland and the ratio of sunny and semi-sunny slope is larger.

关 键 词：林地 草地 园地 退耕 

分 类 号：F320[经济管理—产业经济]