The area of Jembrana Regency is 841.80 km2, has five sub-districts. The total population in 2021 is 281,289 people, covering the Melaya District 54,032 people, State District 85,349 people, Jembrana District 56,061 people, Mendoyo District 58,909 people, Pekutatan District 26,938 people. Gerokgak District is part of the western part of Bulelelng Regency. The population of Grokgak Subdistrict in 2021 is 86,421 people. The integration of clean water supply in the western part of Bali is very important, because the community is a collection of individuals who have socio-cultural, occupying different areas and environments, but have a common interest, for the fulfillment of water as a source of human life. Differences in interests in the use of water include, domestic and non-domestic interests, industry, irrigation and conservation. To find out the potential of Tukad Unda downstream in providing clean water, an analysis of its water The provision of clean water in the western part of Bali will be studied in this study, in line with efforts to improve clean water management in Jembrana Regency and Buleleng Regency. To determine the water balance in providing clean water, an analysis of water availability and water needs is carried out.

Based on data from the Tabanan Regency Central Bureau of Statistics in 2020 administratively the Tabanan Regency area is 839.33 km2, consisting of 133 villages and 816 official banjars, with a population of 448,000 people. Tabanan Regency is one of the regencies in Bali, where the topographical conditions of the existing villages are mostly in remote areas, so they often experience difficulties with clean water distribution problems. For the current condition, the provision of clean water in Tabanan Regency is provided by PDAM (Local Water Company) through the use of springs, ground water and river water, in addition to several areas the water supply is carried out through Pamsimas (Community-Based Drinking Water and Sanitation Provision). Currently Pamsimas Tabanan Regency is divided into 9 service coverage areas for people in rural areas. In general, the condition of drinking water services presents the main problem, namely that not all areas are accessed by adequate water services. This problem is mainly caused by various obstacles such as limited water resources, limited infrastructure and topographical conditions.

The area of Jembrana Regency is 841.80 km2, has five sub-districts. The total population in 2021 is 281,289 people, covering the Melaya District 54,032 people, State District 85,349 people, Jembrana District 56,061 people, Mendoyo District 58,909 people, Pekutatan District 26,938 people. Gerokgak District is part of the western part of Bulelelng Regency. The population of Grokgak Subdistrict in 2021 is 86,421 people. The integration of clean water supply in the western part of Bali is very important, because the community is a collection of individuals who have socio-cultural, occupying different areas and environments, but have a common interest, for the fulfillment of water as a source of human life. Differences in interests in the use of water include, domestic and non-domestic interests, industry, irrigation and conservation. To find out the potential of Tukad Unda downstream in providing clean water, an analysis of its water The provision of clean water in the western part of Bali will be studied in this study, in line with efforts to improve clean water management in Jembrana Regency and Buleleng Regency. To determine the water balance in providing clean water, an analysis of water availability and water needs is carried out.

Management of Water Resources in order to meet the needs of living things is very important. Management of Water Resources that is not integrated will cause various problems, including drought, conflicts of interest between water users. The Bukian Irrigation Area is an irrigation area that utilizes surface water for its agricultural activities. Currently the Bukian Irrigation Area obtains irrigation water from the Bukian I weir and Bukian II weir as a supply weir to increase the need for water discharge required in the irrigation area. In the utilization of surface water that is used to meet irrigation needs at this time less attention is paid to a good water management system, such as a lack of control over water use. Water management can be carried out properly if the condition of the water balance in the system is known. Related to this, additional discharge and integrated water management are needed to avoid conflicts of interest between water users. The method in this study is a quantitative analysis with the mainstay discharge variable in the Bukian I and II weirs and irrigation water demand based on the existing cropping pattern.