Abstract
Abstract With the Dianchi Lake drainage area as the subject of research, the TM remote sensing images of the four time points taken in 1974, 1988, 1998 and 2008 as data basis and the combination of image processing, geographic information system and the relevant metrology software, the present paper not only analyzed the land use dynamic change and tendency, but also studied the mechanism of the impact of land use change on the water environment in the studied area with Markov model, the results of which showed that: (1)The land use situation in the Dianchi Lake basin in the past 30 years has significantly changed, in which the changes of the arable land, construction-use land and other similar changes are extremely great, while the changes of the water area and forest are not so obvious. (2) The results of Markov model forecast showed that the land for construction in the studied area further increases in 2015-2030 while the woodland, water area and other types of land further decreases, but the rate of decrease is gradually becoming smaller and the cultivated land area continues to decrease as well. (3) The water quality near the Dianchi Lake drainage area is affected by the type and change of land use.
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