ZHAO wen-ji
Capital Normal University China
E mail:[email protected]
GONG hui-li
Abstract
The west of Jilin province lies in the center of Song-liao plain, which was once an important stockbreeding base in the province and one of the perfect natural pastures in china, now where ecological environment becomes worse and the “triple deteriorate” are serious, was made the whole the west of Jilin area in the severe ecological crises because of the factor of weather, over-browse, irrational land utilization and so on since 1980s. With the problems of “triple deteriorate” is increasing, which have greatly effected the environment of economic development and people lives. So it is very important reference value to control “triple deteriorate”, and implement specific measures to improve ecological environment that studying the space-time distribution rule. This article applied remote sensing technology as the research methods to analyze the image information of land desertification in the west of Jilin province in 1980s and in 1990s and establish all kinds of image interpreted symbols of environmental essential such as physiognomy, grass, water system, salina, sand land, vegetation and so on in the area. On the base of vary time remote sensing data, linking with the information of the land utilization, vegetation change and climate change currently which investigated on the spot, we established basic database of desertification in the west of Jilin province and found out the space-time distribution rule of triple deteriorate phenomenon by the analysis between different period information, made a conclusion in the connection among the desertification, the salinization of the land and meadow degeneration. Base on the natural situation in the west of Jilin province, it is the essence measure to protect the ecological environment by removing the water from the north to the south, dredging the ground water system, establishing the inspect system of wetland resource to recover the damaged wetland.
