Quantitative Study on the Drive Factors of Wetland Change in Three Rivers' Source Area

CHEN Yong-fu; LIU Hua; ZOU Wen-tao; ZHANG Huai-qing

The TM remote sensing data of 1990, 1997 and 2007, 652 sample plots data, climate and social economy data of 1990 to 2007, the wetland distribution map, the vegetation distribution and the topographic maps was used to define the main factors driving wetland type change, so as to establish drive model of wetland change by partial correlation analysis. The results showed that the main drive factors of river and flood land change were annual average temperature, annual evaporation, annual relative humidity and annual milk production; the main drive factors of lake change were annual evaporation, annual relative humidity, annual population and annual milk production; the main drive factors of marsh and total wetland change were annual rainfall, annual population and annual average personal income. The Judge coefficient R2 of drive model were 0.830 1, 0.757 2, 0.967 5, 0.833 3, and 0.967 9. Through F examination, the influence of independent variable to random variable was notable.

1. Research Institute of Forest Resource and Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

Received Date: 2011-12-20

Available Online: 2012-10-11

Abstract: The TM remote sensing data of 1990, 1997 and 2007, 652 sample plots data, climate and social economy data of 1990 to 2007, the wetland distribution map, the vegetation distribution and the topographic maps was used to define the main factors driving wetland type change, so as to establish drive model of wetland change by partial correlation analysis. The results showed that the main drive factors of river and flood land change were annual average temperature, annual evaporation, annual relative humidity and annual milk production; the main drive factors of lake change were annual evaporation, annual relative humidity, annual population and annual milk production; the main drive factors of marsh and total wetland change were annual rainfall, annual population and annual average personal income. The Judge coefficient R2 of drive model were 0.830 1, 0.757 2, 0.967 5, 0.833 3, and 0.967 9. Through F examination, the influence of independent variable to random variable was notable.

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Reference (20)

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Quantitative Study on the Drive Factors of Wetland Change in Three Rivers' Source Area

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