刘英, 吴立新, 岳辉. 基于梯度结构相似度的矿区土壤湿度空间分析[J]. 武汉大学学报 ( 信息科学版), 2018, 43(1): 87-93. DOI: 10.13203/j.whugis20160216
引用本文: 刘英, 吴立新, 岳辉. 基于梯度结构相似度的矿区土壤湿度空间分析[J]. 武汉大学学报 ( 信息科学版), 2018, 43(1): 87-93. DOI: 10.13203/j.whugis20160216
LIU Ying, WU Lixin, YUE Hui. Spatial Distribution Characteristics Analysis of Soil Moisture in Desertification Mining Areas Based on Gradient-Based Structural Similarity[J]. Geomatics and Information Science of Wuhan University, 2018, 43(1): 87-93. DOI: 10.13203/j.whugis20160216
Citation: LIU Ying, WU Lixin, YUE Hui. Spatial Distribution Characteristics Analysis of Soil Moisture in Desertification Mining Areas Based on Gradient-Based Structural Similarity[J]. Geomatics and Information Science of Wuhan University, 2018, 43(1): 87-93. DOI: 10.13203/j.whugis20160216

基于梯度结构相似度的矿区土壤湿度空间分析

Spatial Distribution Characteristics Analysis of Soil Moisture in Desertification Mining Areas Based on Gradient-Based Structural Similarity

  • 摘要: 基于中国蒙、陕、晋、三省区的神东矿区2000-2015年成像光谱仪数据,双抛物线型归一化植被指数(normalized difference vegetation index,NDVI)和地表辐射温度(land surface temperature,Ts)(记为NDVI-Ts)特征空间的温度植被干旱指数法计量地表土壤湿度,采用梯度结构相似度法定量分析研究区土壤湿度的时空分布特征。结果表明:神东矿区土壤湿度变化具有明显时空分布异质性,空间上,矿区土壤湿度表现出从西北部向东南部逐渐增加的规律,干旱区域由2000年的96.03%下降到2015年的59.59%;矿区60.05%的区域的土壤湿度发生了突变,其中49.87%区域地表植被覆盖得到明显改善,土壤湿度得到明显提高;35.18%的区域的土壤湿度发生了变化,其中28.13%区域地表植被覆盖有所改善,土壤湿度有所增加;仅有4.77%的区域的土壤湿度没有发生改变。进一步分析表明,地表土壤湿度的时空分布特征受区域地貌类型和下垫面覆盖影响较大。

     

    Abstract: Soil moisture is the key element in study of underground coal mining disturbance in desert mining area. The Shendong Mining area, a typical desert mining area, and was selected as the research region. Temperature vegetation dryness index (TVDI), acquired from the bi-parabolic NDVI-Ts space, was applied to monitor the soil moisture conditions in Shendong mining area based on the MODIS data from 2000 to 2015. The Gradient-based structural similarity (GSSIM) method was applied to quantitatively analyze the spatial distribution of soil moisture in Shendong mining area over the past 16 years. The results show that the change of soil moisture has distinct temporal and spatial heterogeneity characteristics in the Shendong mining area, specifically expressed as follows:(1) there was a gradually increasing trend of soil moisture from the northwest to the southeast; while the drought area dropped from 96.03% in 2000 to 59.59% in 2015;(2) soil moisture mutated in most of mining area, accounting for 60.08% of the total area from 2000 to 2015, and 49.87% of the vegetation cover in the mutated area showed significant betterment, as the soil moisture apparently improved. About 35.18% of the area showed changes in soil moisture while 28.13% of the vegetation cover improved with increased soil moisture. Soil moisture, in only 4.75% of the mining area, did not change significantly. The spatio-temporal distribution of soil moisture are influenced by landforms and underlying surfaces.

     

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