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Posted:14 Mar 2014
Rice Crop Spatial Distribution And Production Estimation Using Modis Evi (case study of Karawang, Subang, and Indramayu Regency)
by : Jarot Mulyo Semedi
Supervised by : Vincentius P. Siregar and Hartanto Sanjaya.
Year : 2012
Sumamry :
Rice in Indonesia generally is harvested twice a year (80-90 growing days) in well irrigated areas and harvested once a year (100-130 growing days) in non-irrigated areas. Changes in plant phenology are considered to be a most sensitive indicator of plant responses to climate change observable on remotely sensed images. Vegetation Index (VI) is used to diagnose and predict crop behavior over time by using multi temporal Enhanced Vegetation Index (EVI) from MODIS imageries to estimate crop areas. The EVI will take full advantage of MODIS measurement capabilities to correct for various distortions in the reflected light caused by the particles in the air as well as the ground cover below the vegetation. The classified EVI were compared with crop statistic of the research area to detect which group of classification has the rice growth pattern using regression analysis. Both estimation on rice field area and production from MODIS EVI were under estimated compared to BPS data with error value of 7,38% for rice field area and 10, 36% for rice productivity. The temporal pattern of MODIS EVI images for two groups of classification (Group D and F) shows normal pattern of rice growth since 2008 through 2010, while different pattern showed by Group G, H and J. The last three classes shows normal growing pattern in 2008 and 2009, but in 2010 show disturbed pattern with many variation of EVI value through time and it was confirmed with the decreasing production number in BPS data. The production estimation of rice was very depends on the variety of rice being planted in the research area. The errors of rice production calculation can be minimized by identifying the areas of each rice varieties

Keywords: MODIS EVI, Rice, Temporal Analysis, Phenology