Temporal Monitoring of Aus Rice Using MODIS 16 Days Composite NDVI Data: a study over Barisal region of Bangladesh

Mozammel Haque Sarker

Abstract


ABSTRACT

Bangladesh is an agricultural country. About 80% of the total population is depending on agriculture. Rice is our main crop. It has three types namely Aus, Aman and Boro. The Area of Aman 52.46% is higher than that of Boro 36.43% and remaining are Aus. SPARRSO has been successfully monitored Aman and Boro rice for last two decades. Due to less percentage of Aus rice area and planting time mostly in monsoon period no one has monitored it regularly. But accurate and timely information on Aus growth and their acreages are essential for strengthening countries food security. Conventional methods of collecting this information are relatively costly and time consuming. Contrarily, satellite observation with its unique capability to observe the earth's surface repeatedly over large area offers a potential means for country scale monitoring of crop condition. The optical remote sensing NOAA, Terra/Aqua, SPOT, Landsat images are not so enough for temporal monitoring of Aus rice due to cloud cover in monsoon period. RADARSAT data is very much useful for such purpose but data is not available as it is very expensive. So study of Aus rice monitoring using MODIS, 16-days composite, NDVI images at 250 m resolution may effectively use for such purpose. The under laying idea of using 16-day composite NDVI images is that there is a good possibility of getting cloud free images every after 16 days. Masked layer of settlement, river and non-crop areas have been applied to get the actual acreage of Aus plantation from composite NDVI images.

In the above context an attempt was made to construct the temporal and spatial growth profile of Aus rice of 2010 over Barisal region of Bangladesh using MODIS 16-day composites NDVI data. For identifying the temporal and spatial growth profiles, representative numbers of sampling sites were selected from the temporal composite of NDVI images. The study reveals that about 263011 hectares areas have been found in Barisal region under Aus rice cultivation in 2010.

Keywords: Accurate, acreage, conventional, Satellite observation, MODIS, NDVI

References


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ISSN : 2251-1563