Shun Buri, Qing Song, Bao Yuhai, et al. Temporal and Spatial Variation of Surface Water Area and Its Influencing Factors in Inner Mongolia During 2009-2018[J]. Bulletin of Soiland Water Conservation, 2021, 41(3): 312-319.
DOI:
Shun Buri, Qing Song, Bao Yuhai, et al. Temporal and Spatial Variation of Surface Water Area and Its Influencing Factors in Inner Mongolia During 2009-2018[J]. Bulletin of Soiland Water Conservation, 2021, 41(3): 312-319. DOI: 10.13961/j.cnki.stbctb.2021.03.041.
Temporal and Spatial Variation of Surface Water Area and Its Influencing Factors in Inner Mongolia During 2009-2018
[Objective] The surface water area changes in various cities of Inner Mongolia Autonomous Region were studied
and the correlation between the changes and natural factors and human activities was analyzed, in order to provide a basis for ecological environmental protection and restoration research and water resource management in Inner Mongolia. [Methods] Firstly
normalized difference water index (NDWI) was determined to extract surface water distribution range. Secondly
the initial threshold was determined from statistics of the spectral indexes of seven surface feature types. Finally
the surface water of Inner Mongolia during 2009—2018 was extracted under the optimal threshold
and the spatial and temporal variation characteristics and influencing factors were analyzed by statistical area. [Results] From 2009 to 2013
the surface water area of Inner Mongolia increased continuously (slope=247 km2/year); from 2013 to 2015
the surface water area decreased sharply (slope=150 km2/year); in 2018
the area rose to the highest point. During the study period
the change law and trend of the surface water area and the natural or human factors affecting the surface water area were different for different league (cities). [Conclusion] The variation of annual precipitation and of river runoff was one of the main reasons for the variation of surface water in some Inner Mongolia League cities
such as Alxa League and BayanNur City. Construction of reservoirs
landfill of rivers and cultivated land were the main causes of surface water changes in some cities
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