遥感信息
遙感信息
요감신식
2015年
2期
111-115
,共5页
归一化植被指数%陆地表面温度%温度植被干旱指数%干旱监测%干旱评估
歸一化植被指數%陸地錶麵溫度%溫度植被榦旱指數%榦旱鑑測%榦旱評估
귀일화식피지수%륙지표면온도%온도식피간한지수%간한감측%간한평고
NDVI%land surface temperature%TVDI%drought monitoring%drought evaluation
针对近年频发的干旱情况不能准确及时监测评估的问题，该文以新疆为研究区域，基于温度植被干旱指数方法，利用2007年到2012年3月～8月 MODIS 合成产品数据获取归一化植被指数和陆地地表温度，构建LST-NDVI 特征空间，得到全区的温度植被干旱指数和旱情等级空间分布图，分析了新疆干旱变化趋势，验证了温度植被干旱指数和降水因子的关系。结果表明：2007年～2012年新疆的干旱面积逐年趋于平稳，空间上表现为南疆旱情高于北疆，春季旱情高于夏季，降水量是影响温度植被干旱指数的重要因子。该研究为政府部门对新疆旱情严重地区治理提供了有效数据保证。
針對近年頻髮的榦旱情況不能準確及時鑑測評估的問題，該文以新疆為研究區域，基于溫度植被榦旱指數方法，利用2007年到2012年3月～8月 MODIS 閤成產品數據穫取歸一化植被指數和陸地地錶溫度，構建LST-NDVI 特徵空間，得到全區的溫度植被榦旱指數和旱情等級空間分佈圖，分析瞭新疆榦旱變化趨勢，驗證瞭溫度植被榦旱指數和降水因子的關繫。結果錶明：2007年～2012年新疆的榦旱麵積逐年趨于平穩，空間上錶現為南疆旱情高于北疆，春季旱情高于夏季，降水量是影響溫度植被榦旱指數的重要因子。該研究為政府部門對新疆旱情嚴重地區治理提供瞭有效數據保證。
침대근년빈발적간한정황불능준학급시감측평고적문제，해문이신강위연구구역，기우온도식피간한지수방법，이용2007년도2012년3월～8월 MODIS 합성산품수거획취귀일화식피지수화륙지지표온도，구건LST-NDVI 특정공간，득도전구적온도식피간한지수화한정등급공간분포도，분석료신강간한변화추세，험증료온도식피간한지수화강수인자적관계。결과표명：2007년～2012년신강적간한면적축년추우평은，공간상표현위남강한정고우북강，춘계한정고우하계，강수량시영향온도식피간한지수적중요인자。해연구위정부부문대신강한정엄중지구치리제공료유효수거보증。
Considering the conditions of droughts occurred frequently in recent years,Xinjiang province was selected as the study area in this study,and by using the compound MODIS data from March to August during 2007 and 2012,the NDVI (normalized difference vegetation index)and LST (land surface temperature)were obtained,and the LST-NDVI feature space was firstly established.Then,the condition of TVDI (temperature vegetation dryness index)and spatial distribution of drought grade in the study area were obtained,the variation tendency of the drought in Xinjiang was analyzed,and the relationship of precipitation and TVDI was verified.The result showed that the drought area of Xinjiang had leveled off with each passing year from 2007 to 2012,drought severity on south Xinjiang was severer than that on north Xinjiang in the spatial performance,and drought severity on Spring was severer than that on summer;the precipitation factor showed an important factor affecting the TVDI.
