| Cite this article: | 袁瑞强,青松.1990-2015年内蒙古地表水时空变化特征及影响因素分析[J].灌溉排水学报,0,():-. |
| yuanruiqiang,qingsong.1990-2015年内蒙古地表水时空变化特征及影响因素分析[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Spatiotemporal variation characteristics and influencing factors of surface water in Inner Mongolia from 1990 to 2015 |
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yuanruiqiang, qingsong
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Inner Mongolia Normal University
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| Abstract: |
| Land surface water, including lakes, rivers, reservoirs and ponds, is the most important terrestrial resource on earth, and it is extremely important for agriculture, industry, aquaculture, aquatic and terrestrial ecosystems. This paper uses 576 Landsat images combined with GF-2 PMS high-resolution images to investigate the spatiotemporal changes of surface water in Inner Mongolia from 1990 to 2015.The performance and stability of 6 different spectral indexes (MNDWI, NDWI, AWEI, MBWI, WI2015, TCW) were evaluated in four typical sub-regions of the study area, and the optimal water index suitable for surface water extraction and identification in Inner Mongolia was determined . The study found that the AWEI water body index threshold is stable, has good stability and practicality, and is more suitable for surface water monitoring and identification in the study area. From 1990 to 2010, the surface water area in Inner Mongolia declined sharply, taking 2010 as a turning point. During 2010-2015, the surface water area in the study area increased and recovered. Except for the Xing'an League, Hohhot, and Wuhai, which showed a slowly increasing trend, the other nine League cities all showed a downward trend in their water bodies. The factors influencing the change of surface water in the study area are complex and diverse. In general, the change in surface water area in Inner Mongolia is caused by the dual factors of climate and man-made effects. The man-made factors are the main influencing factors for the reduction of surface water area and the shrinkage of lakes. |
| Key words: Surface water ; Landsat image; Water index; Inner Mongolia. |
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