ABSTRACT
New irrigation area located in Bangorejo Sub-district of Banyuwangi Regency is an irrigation building with an area of ± 5981 Ha of paddy field originating from Karangdoro dam in Tegalsari Sub-district. The Karangdoro dam itself has an area of ± 16,165 hectares of rice fields divided into three service area: Pesanggaran (4381 Ha), Cluring (5945 Ha), and Bangorejo (5981 Ha). This research is focused on New irrigation service area Bangorejo because of the availability of water in the area during the dry season often experience shortage. Therefore, optimization efforts are made using the dynamic program to determine the water requirements for each plant, the optimum planting pattern, the area of cultivable land and the maximum profit. With the application of the dynamic program can be obtained irrigation water requirement, that is enough year when MH = 33,11 m3 / s, MK I = 30,77 m3 / s, MK II = 12,32 m3 / s, normal year at MH = 24 M3 / s, MK I = 29.51 m3 / s, MK II = 17.87 m3 / s, low year at MH = 35.8 m3 / s, MK I = 30.47 m3 / s, MK II = 18,76 m3 / s, and dry year at MH = 63,86 m3 / s, MK I = 33 m3 / s, MK II = 19 m3 / s. Profits derived from the discharge flowing in the New Irrigation area is Rp. 88,818,984,562.42 with an increase of 31.35% in the low year, Rp. 65.318.263.206,83 with an increase of 56,08% for dry year, Rp. 90,239,784,195,27 with 31,87% increase for enough year, Rp. 87.904.986.310,93 with an increase of 23.47% for the normal year.
