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- 2018
基于梯度结构相似度的矿区土壤湿度空间分析
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Abstract:
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
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