Quantitative Assessment of Impacts of Regional Climate and Human Activities on Saline-alkali Land Changes:A Case Study of Qian'an County,Jilin Province |
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| Authors: | LIAN Yi WANG Jie TU Gang REN Hongling SHEN Baizhu ZHI Keguang LI Shangfeng GAO Zongting |
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| Institution: | LIAN Yi,WANG Jie,TU Gang,REN Hongling,SHEN Baizhu,ZHI Keguang,LI Shangfeng,GAO Zongting(Laboratory of Research for the Mid-High Latitude Circulation System , East Asian Monsoon,Institute of Meteorological Science of Jilin Province,Changchun 130062,China) |
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| Abstract: | Interdecadal and interannual variations of saline-alkali land area in Qian'an County, Jilin Province, China were comprehensively analyzed in this paper by means of satellite remote sensing interpretation, field flux observations and regional climate diagnosis. The results show that on the interannual scale, the impact of climate factors accounts for 71.6% of the total variation of the saline-alkali land area, and that of human activities accounts for 28.4%. Therefore the impact of climate factors is obviously greater than that of human activities. On the interdecadal scale, the impact of climate factors on the increase of the saline-alkali land area accounts for 43.2%, and that of human activities accounts for 56.8%. The impact of human activities on the variation of saline-alkali land area is very clear on the interdecadal scale, and the negative impact of human activities on the environment should not be negligible. Besides, changes in the area of heavy saline-alkali land have some indication for development of saline-alkali land in Qian'an County. |
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| Keywords: | saline-alkali land regional climate change human activities |
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