DESIGN OF DRINKING WATER DISTRIBUTION NETWORK SYSTEM IN JEKULO DISTRICT KUDUS REGENCY

• Main Author: Ichsan Nurul Ramadhan, M
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/64108
• Institution: Institut Teknologi Bandung

According to the Kudus Regency's RTRW for 2012-2032, the Jekulo District area includes the Promotional Local Activity Center (PKLp), which will subsequently become the Local Activity Center (PKL) as a new industrial area and residential service. With the passage of this regional spatial plan, infrastructure development in the Jekulo District area is required to support the plan. Drinking water infrastructure is one of the infrastructures that has to be created. Meanwhile, only 2,896 houses in Jekulo District have access to the Drinking Water Supply System (SPAM) pipeline network (PDAM Kudus, 2019). When compared to the population of Jekulo Subdistrict, which is 108,663 individuals, only 13% of the population has access to the Drinking Water Supply System (SPAM). This result falls short of the Kudus Regency's goal of limiting the usage of drilled wells to no more than 30% of existing houses. As a result, there is a plan under Kudus Regency's Master Plan for the Drinking Water Supply System (RISPAM) to build a new service area in Jekulo District until 2033. With the building of the Tanjungrejo Reservoir, a new service area in Jekulo District will be developed with a system capacity of 150 liters/second to support 12,188 new housing connections. The Jekulo District's service area development plan prioritizes areas that PDAM and the Community-Based Participation (PAMSIMAS) program have yet to reach. Sadang Village, Sidomulyo Village, Gondoharum Village, Pladen Village, Klaling Village, Tanjungrejo Village, and Honggosoco Village are among the seven settlements in the area. The predicted drinking water demands are calculated after understanding the target village that would be used for development. The average daily requirement is 85.61 liters/second, the maximum daily requirement is 107.01 liters/second, and the peak hour requirement is 149.81 liters/second, according to the drinking water forecast. After receiving a projection of the additional service area's drinking water needs, an alternate distribution network route will be developed. Three different distribution network lines will be created in this concept. The topography, the protocol road, and the distribution of the residential areas to be served are all taken into account throughout the design process. The three options employ water sources that originate at the Logung Reservoir WTP and flow first to the Tanjungrejo Reservoir before gravity-feeding to consumers. Based on the results of the weighting of the alternative distribution network paths, alternative 3. There is one pipe in alternative 3 that does not fulfill the 0.3 m/second minimum speed design criteria, but the maximum speed results already meet the design criteria below 3 m/second. With a total length of pipe used of 21,955 m, the minimum pressure results met the design standards of 10 m, and the maximum pressure met the design criteria of 80 m. Following the selection of an alternative route, the reservoir capacity is calculated and the type of pipe to be utilized for distribution lines is chosen. Tanjungrejo Reservoir has a capacity of 2,000 m3 with dimensions of 26 m x 26 m x 3.5 m. uPVC (Unplasticized Polivynil Chloride) pipe is the type of pipe utilized in this design. The uPVC pipes used are uPVC pipes with the Indonesian National Standard (SNI). The SNI uPVC pipe was chosen because its quality assurance has been guaranteed by the National Standardization Agency (BSN). A total investment of Rp. 20,412,748,100.00 and an annual operating cost of Rp. 288,406.820.00 are required to develop a drinking water distribution network in Jekulo District, Kudus Regency. The Benefit Cost Ratio (BCR) value of 2.04 is achieved with a predicted income of Rp 47,808,777,163.00 for the planning period. The BCR value > 1 indicates that the investment in the distribution network system design project in Jekulo District, Kudus Regency is profitable.