Study On Factors And Rule About Temporal And Spatial Evolvement On Desertification Last 20 Years In Daliuta Coal Mining Areas

Land desertification is a significant environment social economy question which the world faces now, and is also an important content of global change research. The desert area is big in our country and disaster is more serious especially the belt of farming and animal husbandry interlocks, prairie area and the desert boundary zone in north. Land desertification directly affects survival and development of human being, so it's influence factor research is an important issue needs to resolve. Daliuta Coal Mining Areas is on the edge of MU Us desert and is one hundred million tons energy bases of our country. Land desertification is main environment question this area, the rule about spatial and tempotal evolution and influence factor are urgent question needs to resolve at present.The paper is mainly based the support of geography, ecology and environments geology and system theory,uses 1: 25,000 topographic diagrams, GPS localizations, remote sensing, taking photos and videos for typical landform. By manage remote sensing TM data of 1986s the initial stages of mining, 1996s the metaphase stages of mining and SPOT-5 of 2005 s ,establish interpreting symbol by combine image character and datum from fieldwork then obtained the rule about spatial and tempotal evolution and tendency after analyzing three periods land desertification data of research area. The degree of desertification mitigated and area reduced the last 20 years, non-desertification and latent desertification are accounts for 77.45% in research area 2005.Serious desertification has changed to longitudinal, flowing sand dune has riveted and half-riveted.Non-desertification and latent desertification occupied most coal collapses in research areas. Serious desertification has reduced, latent desertification is increased year by year, Non-desertification and latent desertification have no obvious change. There has no obvious change in coal collapses after mining, land desertification damaged area didn't aggravate. We concluded that the rainfall is the primary influence factor to desertification. Land desertification development tendency is same basically in Mining coal collapses and all research area. Mines have little influence to land desertification. Changing the use of land backspin desertification by withdraw tilth. These research conclusions are important to this mining area and similar mining area coal resources development and ecological environment protection.