Analyzing Change of Eco-Environment Based on Spatial Data in the Farming-Pastoral Region of Northern China

摘要

The paper selects 10 kinds of indexes to reflect ecological environment background condition and build the multi-subject spatial database by using ground meteorological data, remote sensing data and DEM. Then methods are illuminated in detail about evaluating eco-environment background conditions and analyzing change. Eco-environment background condition is synthetically appraised in 1989 and 1999. Finally, the paper analyzes the spatial distribution, quantitative change, the trend of change, the change region and the dynamic spatial pattern of eco-environment. The results are as follows: (1) The eco-environment background condition becomes worse from southeast to northwest in the farmland-pastoral region of northern China. (2) The eco-environment background condition deteriorates from 1989 to 1999. (3) In the adjacent area of Jin-Shan-Meng-Gan-Ning, Horqin desert and its outer area, the east Qinghai province, changes of ecological environment are very terrible.