基于MODIS的神东矿区土壤湿度变化监测

 地表土壤湿度是矿区环境监测的内容之一,对判别采矿扰动地表程度具有重要意义。本文以中国西北干旱地区的神东矿区为试验区,利用中分辨率成像光谱仪(MODIS)数据和热惯量法,对矿区地表土壤湿度进行了反演;同步选取若干地面点按深度分层进行现场实测,与遥感结果进行比对拟合。结果表明,在局部植被盖度较高的区域,遥感结果与不同深度实测结果相关性较差;在植被稀疏的区域,二者相关性较好,其中遥感结果与10cm土壤湿度相关性最好。对9年低盖度区域的土壤湿度变化情况进行监测发现,与背景区相比,矿区表层土壤并未发生干化。初步分析认为这与矿井水循环利用和矿区环境治理有关。

Soil Moisture Monitoring in Shendong Mining Area Based on MODIS Data

Soil moisture monitoring plays an important role in the environment management for the mining area. By taking the arid-to-semiarid Shendong mining area as an example, soil moisture was retrieved by using thermal inertia method. According to the synchronous field survey, in the densely covered area, the remotely sensed result is not significantly correlated with field data; contrarily, in the sparsely covered area, the correlation is significant and the remotely sensed result is well correlated with field data on the soil of 10-cm depth. The linear regression model was established to monitor the soil moisture in the mining area. Compared with the background, the soil of 10-cm depth has not got dry in the mining area during the last nine years. The primitive analysis indicates that making use of mine drainage and the measurement on environmental protection might be the main reason for that.