本文選題：干旱遙感監(jiān)測 + MODIS數(shù)據(jù)��； 參考：《農(nóng)業(yè)機械學(xué)報》2017年06期

【摘要】：為獲得基于Landsat衛(wèi)星遙感數(shù)據(jù)更為精確的定量化干旱監(jiān)測結(jié)果,以陜西省關(guān)中平原為研究區(qū)域,基于Aqua MODIS數(shù)據(jù)反演的1 km空間分辨率的條件植被溫度指數(shù)(VTCI)的定量化干旱監(jiān)測結(jié)果(MODIS-VTCI)和Landsat OLI/TIRS數(shù)據(jù)反演的30 m空間分辨率的VTCI相對干濕監(jiān)測結(jié)果(Landsat-VTCI),應(yīng)用降尺度的中值融合模型(MFM)將基于MODIS數(shù)據(jù)反演的VTCI降尺度至30 m空間分辨率的VTCI定量化干旱監(jiān)測,并對其結(jié)果進行驗證。結(jié)果表明,應(yīng)用降尺度的中值融合模型轉(zhuǎn)換的VTCI定量化干旱監(jiān)測結(jié)果(MFM-VTCI)與Landsat-VTCI的空間分布及紋理特征相似,兩者間的相關(guān)系數(shù)和結(jié)構(gòu)相似度均較大,均方根誤差、差值影像及差值頻數(shù)分布圖所呈現(xiàn)的結(jié)果與定量化干旱監(jiān)測結(jié)果和相對干濕監(jiān)測結(jié)果間的系統(tǒng)誤差相符,表明Landsat-VTCI與MFM-VTCI間的可比性較強。MFM-VTCI與累計降水間的相關(guān)性和MODIS-VTCI與累計降水間的相關(guān)性相近,均大于Landsat-VTCI與累計降水間的相關(guān)性,表明MFM-VTCI是定量化的干旱監(jiān)測結(jié)果。
[Abstract]:In order to obtain more accurate quantitative drought monitoring results based on Landsat satellite remote sensing data, the Guanzhong Plain of Shaanxi Province is taken as the research area. 1 km spatial resolution conditional vegetation temperature index (VTCI) based on Aqua MODIS data inversion, quantitative drought monitoring results (MODIS-VTCI) and 30 m spatial resolution relative dry and wet monitoring results (Landsat-VTCI) of Landsat OLI / TIRS data. The value Fusion Model (MFM) is used to quantify the drought monitoring with VTCI downscaling to 30 m spatial resolution based on MODIS data. The results are verified. The results show that the VTCI quantitative drought monitoring results (MFM-VTCI) and Landsat-VTCI are similar to Landsat-VTCI in spatial distribution and texture characteristics. The correlation coefficient and structural similarity between them are large, and the root mean square error (RMS). The results of difference image and difference frequency distribution map are consistent with the systematic error between quantitative drought monitoring results and relative dry and wet monitoring results. The results show that the correlation between Landsat-VTCI and MFM-VTCI is stronger. The correlation between MFM-VTCI and accumulated precipitation and between MODIS-VTCI and accumulated precipitation is similar, which is higher than that between Landsat-VTCI and accumulated precipitation, which indicates that MFM-VTCI is a quantitative result of drought monitoring.
【作者單位】： 中國農(nóng)業(yè)大學(xué)信息與電氣工程學(xué)院;陜西省氣象局;
【基金】：國家自然科學(xué)基金項目(41371390)
【分類號】：Q948;TP79
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本文編號：2061659