基于RS和GIS的纸坊沟流域土地利用动态监测及分析

以纸坊沟流域多年土地利用监测数据为基础 ,对其结果进行分析和讨论。结果表明 ,到 1 999年底 ,农业、林业、牧业用地面积比例分别为 1 6.9%、34.0 %、36.8%。人均基本农田由 1 975年 0 .0 5 4 7hm2 ,增到 1 999年的 0 .2 0 33hm2 ,坡耕地大幅度减少 ,粮食平均产量也由 1 975年的 5 61 kg/hm2 ,增到 1 999年的 2 31 9kg/hm2 ,流域林草有效覆盖率达到 5 7.4% ,植物种类和数量得到增加。走上了农林牧协调发展和生态环境良性循环的轨道

The results of dynamic monitoring landuse of Zhifanggou watershed for over 60 years were analyzed and disussed. The monitoring results showed that proportions of the land used for harvesting, growing forest and grazing were respectively 16.9%, 34.0% and 36.8% in the end of 1999. The basic farmland per capita in 1999 reached to 0.2033 hm 2, while it was 0.0547 hm 2 in 1975, as well as average product of grain, from 561 kilogram per hectare in 1975, to 2 319 kilogram per hectare in 1999. The area of slo...