| Abstract |
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This study comprised optimization process for finding crop-area planning in dry-season and the application of optimization program using Linear Programming (LP) to solve optimal area planned in dry-season. The study area was applied to left and right main canal system of Huai Luang Reservoir, Thailand. The calculation data obtained from dry year (2003), normal year (2001) and wet year (1996). The analysis created condition objective function and constraint functions. The constraints consisted of the constriction of area characteristic, irrigation water requirement, water availability, cropping-area of each Irrigation Zones, capacity of Left and Right Main Canal System of Huai Luang Reservoir, capacity of canal in Irrigation Zones and cropping pattern alternatives. The results found that LP was functioned for finding cropping and setting area for dry-season planning. The comparison results from alternative plans found that the areas obtained from first alternative plan which undivided area, it was founded that optimal area was less than that obtained from the second alternative which divided area about 12.62% 11.35% and 4.87% for dry year, normal year and wet year, respectively. Hence, allocation potential for dry season crop-area planning were 4,531.20 ha, 6,574.08 ha and 7,116.64 ha for dry year, normal year and wet year, respectively. The results from equations could made graph of relationship between the areas obtained from equation and the sum of water capacity in Huai Luang reservoir, it found that the graph was functioned well to optimize cropping and setting area for dry-season planning in the further year. The results of testing in 2011/2012 also showed that the difference of the solutions obtained by graph and the cropping area results in main canal system was 4.53%. |
