基于TVDI的沁水煤田地表土壤水分时空演变分析
发布时间：2018-07-16 15:48
【摘要】：温度植被干旱指数(Temperature Vegetation Dryness Index,TVDI)是表征地表干旱的有效指标,其时空格局分析是地表干旱与全球环境变化相互影响下的地表覆被变化的研究内容。以山西沁水煤田为研究区,结合2000—2010年MODND1M和MODLT1M数据,构建了NDVI-Ts特征空间并对干湿边拟合分析。结果表明:近11年来,沁水煤田年平均TDVI均大于0.4,且总体呈显著增加趋势,地表土壤湿度很低,部分区域处于中度和重度干旱之间。年度内,月平均TVDI处于0.5~0.7之间,且7月份TDVI存在明显波动。在空间上,研究区地表土壤湿度分布与地表植被分布基本一致。煤田南部和东部以干旱和极干旱为主,西北山区地带以正常或湿润为主,矿区密集区土壤湿度含量明显低于其他地区,矿井分布附近较其他区域地表干旱现象突出。
[Abstract]:The Temperature Vegetation Drought Index (Temperature Vegetation Dryness Index, TVDI) is an effective indicator to characterize the surface drought. The spatial and temporal pattern analysis is the research content of the surface cover change under the interaction of the surface drought and the global environmental change. The Shanxi Qinshui coalfield is used as the research area, combined with the MODND1M and MODLT1M data from 2000 to 2010. The NDVI-Ts characteristic space and the dry wet edge fitting analysis show that in the last 11 years, the annual average TDVI of the Qinshui Coal field is more than 0.4, and the overall trend is significantly increasing, the soil moisture is very low, some area is between moderate and severe drought. In the year, the average of TVDI is between 0.5~0.7, and in July, there is a significant fluctuation in TDVI. In the study area, the soil moisture distribution in the study area is basically the same as that of the surface vegetation. In the South and the east of the coal field, the arid and extreme drought is the main part, the Northwest Mountainous area is dominated by normal or humid area, and the soil moisture content in the mining intensive area is obviously lower than that in the other areas, and the surface drought in the vicinity of the mine is more prominent than that in the other areas.
【作者单位】： 太原理工大学矿业工程学院;
【基金】：山西省基础研究计划项目(青年)“近30年来山西省农业干旱时空演变规律及其对气候变化的响应研究”(2014021032-1)
【分类号】：S152.7
，
本文编号：2126867
[Abstract]:The Temperature Vegetation Drought Index (Temperature Vegetation Dryness Index, TVDI) is an effective indicator to characterize the surface drought. The spatial and temporal pattern analysis is the research content of the surface cover change under the interaction of the surface drought and the global environmental change. The Shanxi Qinshui coalfield is used as the research area, combined with the MODND1M and MODLT1M data from 2000 to 2010. The NDVI-Ts characteristic space and the dry wet edge fitting analysis show that in the last 11 years, the annual average TDVI of the Qinshui Coal field is more than 0.4, and the overall trend is significantly increasing, the soil moisture is very low, some area is between moderate and severe drought. In the year, the average of TVDI is between 0.5~0.7, and in July, there is a significant fluctuation in TDVI. In the study area, the soil moisture distribution in the study area is basically the same as that of the surface vegetation. In the South and the east of the coal field, the arid and extreme drought is the main part, the Northwest Mountainous area is dominated by normal or humid area, and the soil moisture content in the mining intensive area is obviously lower than that in the other areas, and the surface drought in the vicinity of the mine is more prominent than that in the other areas.
【作者单位】： 太原理工大学矿业工程学院;
【基金】：山西省基础研究计划项目(青年)“近30年来山西省农业干旱时空演变规律及其对气候变化的响应研究”(2014021032-1)
【分类号】：S152.7
，
本文编号：2126867
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