PENINGKATAN KINERJA OPERASI WADUK JEPARA LAMPUNG DENGAN CARA ROTASI PEMBERIAN AIR IRIGASI

Rudi Azuan, Agus Hari Wahyudi, Sobriyah Sobriyah


Abstract


Jepara reservoir sedimentation cause the ability to supply water of irrigation tends to decline. The objective of this research is to analize water supply from reservoir and search the strategy of irrigation cropping pattern and irrigation water distribution in conclution. This research consisted of the following phases: the sedimentation measurement based on echosounding data, calculation of dependable flow, irrigation water requirement, and the reservoir’s operational pattern. The prediction of operational pattern was conducted for the reservoir’s service life projection of 10 years, 20 years, and 30 years and its lifetime plan. The research result indicates that the recent irrigational pattern was inappropriate with manual of KP 01. The planting pattern can still be extended to a three-period planting season with a two-year cropping pattern (paddy–paddy–non-rice crops and non-rice crops–paddy–paddy). The value of K obtained currently up to 20 years to come was from 0.25 to 0.75. It means that the water distribution should be rotate in tertiary level


Keywords


reservoir operation, rotation of water distribution

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