[1]ZHANG Hong,LI Hai-lin,CHEN Zhen.Analysis on Land Use Dynamic Change and Its Impact on the Water Environment in Dianchi Lake Drainage Area[J].Research of Soil and Water Conservation,2012,19(01):92-96.
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Analysis on Land Use Dynamic Change and Its Impact on the Water Environment in Dianchi Lake Drainage Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 01
Page number:
92-96
Column:
Public date:
2012-02-20
- Title:
- Analysis on Land Use Dynamic Change and Its Impact on the Water Environment in Dianchi Lake Drainage Area
- Keywords:
- land use; ArcGIS; Markov; Dianchi Lake Drainage Area; water environment
- CLC:
- X143
- DOI:
- -
- Abstract:
- The study area was divided into 5 big categories according to Class One Classification: arable land, woodland, construction land, water body and other land type. The Edras remote sensing image processing software and the ArcGIS geographic information system software were used to calibrate, match and enhance the Landsat-5(TM) remote sensing satellite images of four periods of 1974, 1988, 1998 and 2008. The resolution of Landsat-5(TM) original data is 30 m. Through the GPS field investigation, the visual interpretation of remote sensing image was obtained and the images of each period were interpreted with human computer interactive interpretation technology to generate the distribution situation of land use at four time points. The ArcMAP module in the ArcGIS was used to conduct a map overlapping analysis, the transition matrix of land use spatial dynamic change was established according to Markov model and 2 indices of land use area variation rate and land use dynamic state were used to quantitatively analyze the land use structural change in the study area, in which the unit root test and cointegration test were adopted to analyze the simulation of land use and water environment change in the drainage area. On the basis before that, Markov forecast model was used and both the land use results in the later period and the effect on the water environment were forecast with the Matlab software. The results showed that: ① the land use situation in the Dianchi Lake basin in the past 30 years had significantly changed, in which the changes of the arable land, construction land and other similar changes were extremely great, while the changes of the water body and forestland were not so obvious; ② the results of Markov model forecast showed that the land for construction in the study area further increases through 2015 to 2030, while the woodland, water body 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;③the correlativity existing between TP and BOD under 5% significant level and COD under 20% significant level can be obtained; ④the indices of water pollution have a tendency of continuous deterioration over the years.
- References:
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1900-01-01