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Global Geology 2012, 15(1) 66-73 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Dynamic analysis of mainstream area and vegetation coverage degree of Songhua River based on RS and GIS techniques |
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CHANG Cheng, ZHANG Yuanqing and ZHU Cong |
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College of Geo-Exploration Science and Technology��Jilin University��Changchun 130026��China |
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Abstract��
Based on remote sensing technique��using 1990's Landsat TM data and 2000's Landsat ETM data��the authors conducts the comparative study of mainstream area of Songhua River by means of human-computer interaction method�� The results show that the area of Songhua River mainstream was 738 102 km2 in 1990�� and was 810. 451 km2 in 2000�� From 1990 to 2000��the increased area of river mainstream is up to 72. 349 km2 due to soil erosion and water loss�� Meanwhile��the dynamic changes of surrounding vegetation cover are also studied�� It is estimated that the trend of surrounding soil erosion and water loss of Songhua River mainstream becomes worse in Jilin Province�� |
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Keywords��
water loss and soil erosion
vegetation cover
RS
GIS
Songhua River mainstream
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Received Revised Online: |
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