ABSTRACT

The MODIS data with high temporal resolution provided by NASA is available in global coverage, enables to research fluctuation of land surface temperature with multi-temporal and multispectral data. In this research, we used MOD11A2 (1-km spatial resolutions, 8-day composite) from 2000 to 2010 for initially calculating and assessing fluctuation of Land surface temperature (LST), Temperature/Vegetation Dryness Index (TVDI) inMekongRiverdelta combining agricultural household interview in the study area. The research has developed a completed process for calculating the Land surface temperature and Temperature/Vegetation Dryness Index for theMekongDelta by using MODIS images. The executed temperature data from this process has high reliability by means of high correlation with the measured data from meteorological stations. In addition, the areas with high TVDI corresponded with field survey of current land use at the same time. These results show that applications of Moderate Resolution Imaging Spectroradiometer (MODIS) with low spatial resolution (1km) and high temporal resolution (8 days) to monitor and forecast drought ofMekongDelta is appropriate. The results will contribute a new approach to resolve the determination of drought related to climate change at present.

Keywords: Drought, TVDI, Land Surface Temperature, MODIS

Title: Application the MODIS images to monitor the change of land surface temperature and drought situation in the Mekong Delta

ToM T?T

D? li?u ?nh v? tinh MODIS cung c?p b?i NASA v?i d? phan gi?i th?i gian cao cho phep nghien c?u bi?n d?ng nhi?t d? b? m?t tren c? hai goc d? da ph? va da th?i gian, cung c?p m?t kh?i l??ng l?n thong tin v? b? m?t trai d?t tren ph?m vi r?ng. Nghien c?u nay s? d?ng dong ?nh v? tinh MOD11A2 (d? phan gi?i 1km, chu k? th?i gian 8 ngay) t? nam 2000 d?n nam 2010 d? tinh toan va danh gia nhi?t d? b? m?t d?t va ch? s? kho h?n vung d?ng b?ng song C?u Long k?t h?p ph?ng v?n h? nong dan trong vung nghien c?u. K?t qu? d? xay d?ng hoan ch?nh qui trinh tinh toan nhi?t d? b? m?t d?t va ch? s? kho h?n th?c v?t TVDI cho vung DBSCL t? ?nh MODIS. K?t qu? s? li?u tinh toan d??c t? qui trinh nay b??c d?u cho th?y co d? tin c?y cao, m?i t??ng quan ch?t v?i cac d? li?u do d?c th?c d?a. Ngoai ra, nh?ng vung co ch? s? kho h?n TVDI cao tren b?n d? c?ng phu h?p v?i k?t qu? kh?o sat th?c t? t?i cung th?i di?m. Di?u nay cho th?y kh? nang ?ng d?ng ?nh vi?n tham nhi?t c?a v? tinh MODIS v?i d? phan gi?i th?p (1km) va chu k? th?i gian ng?n (8 ngay) d? theo d?i va d? bao kho h?n cho toan vung DBSCL la phu h?p. Day la nghien c?u s? gop ph?n xac d?nh cac khu v?c kho h?n ?nh h??ng d?n s?n xu?t nong nghi?p lien quan d?n bi?n d?i khi h?u hi?n nay.

T? khoa: Kho h?n, Ch? s? kho h?n, Nhi?t d? b? m?t d?t, MODIS