【摘要】：溫度植被干旱指數(shù)(Temperature Vegetation Dryness Index,TVDI)是表征地表干旱的有效指標(biāo),其時(shí)空格局分析是地表干旱與全球環(huán)境變化相互影響下的地表覆被變化的研究內(nèi)容。以山西沁水煤田為研究區(qū),結(jié)合2000—2010年MODND1M和MODLT1M數(shù)據(jù),構(gòu)建了NDVI-Ts特征空間并對干濕邊擬合分析。結(jié)果表明:近11年來,沁水煤田年平均TDVI均大于0.4,且總體呈顯著增加趨勢,地表土壤濕度很低,部分區(qū)域處于中度和重度干旱之間。年度內(nèi),月平均TVDI處于0.5~0.7之間,且7月份TDVI存在明顯波動(dòng)。在空間上,研究區(qū)地表土壤濕度分布與地表植被分布基本一致。煤田南部和東部以干旱和極干旱為主,西北山區(qū)地帶以正�；驖駶櫈橹�,礦區(qū)密集區(qū)土壤濕度含量明顯低于其他地區(qū),礦井分布附近較其他區(qū)域地表干旱現(xiàn)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.
【作者單位】： 太原理工大學(xué)礦業(yè)工程學(xué)院;
【基金】：山西省基礎(chǔ)研究計(jì)劃項(xiàng)目(青年)“近30年來山西省農(nóng)業(yè)干旱時(shí)空演變規(guī)律及其對氣候變化的響應(yīng)研究”(2014021032-1)
【分類號(hào)】：S152.7
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本文編號(hào)：2126867