STUDY OF CITARUM’S WATER RESOURCES USED FOR IRRIGABLE AREA ON PAMANUKAN SECONDARY CANAL

• Main Author: ISNAENI - NIM:95015302 , MUHAMMAD
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23279
• Institution: Institut Teknologi Bandung

The East Tarum canal is an irrigation canal from Citarum River, which is catching through by Curug weir then in pumping by six (6) electric pumps consisting of two (2) pumps of 2x10m3/s and 4x17,5m3/s capacity. The installation capacity of Pump on Curug weir is 90m3/s, the availability of installed pump capacity could not be maximized to fulfil the water requirement for downstream area of East Tarum canal. The problem that arises is the downstream water requirement of Bugis main canal/ Bugis offtake structure especially in the lower Pamanukan’s paddy field which is 8.652 Ha or equivalent to the 13,84 lt/s discharge plan during the dry season does not get supplied from irrigation water from upstream. In addition to the source of the East Tarum canal, Bugis offtake structure is also supplied by the Salam Darma weir (Cipunegara River), but in April-September the Cipunegara river is not sufficient to supply water for irrigation. To maximize the utilization of existing water sources in Curug and Salam Darma weir, it is necessary to examine the require for irrigation water and RKI (Household, Urban dan Industry). The peak demand is in April and July of 85,75 m3/s, and the minimum requirement is in September 53,40m3/s. Based on these requirements, the capacity of the East Tarum canal should be able to accommodate the maximum flow capacity at a peak time of Q80m3/s. By examining the hydraulic aspect, the condition of existing canal/related structure (i.e: mid-spillway, offtake structure) and construction costs due to the addition of the discharge. The analysis undertaken start from the analysis of available discharges, nett field require, and reviews of canal and structure conditions. The hydraulic modelling with MIKE.11 uses software to the analysis of selected alternative determinations. As a simulation and calculation results, the water level elevation at some station in the right closer dike, mid spillway, and offtake structure if flowed over than 52,50m3/s, will be spills out the water level and exceed of wet capacity. To select the alternatives, based on consider B/C and EIRR. The increase of crop production of this study results from the area of 2.025ha to 8,652ha or increase 234% with Cropping Season-1,2 and 3. <br /> <br />