Abstract:
The watershed (DAS) is an ecological system in which biotic and abiotic elements interact
with each other. Watershed Management is expected to have an economic impact on people
living within it without ignoring the sustainability and balance aspects of the watershed
ecosystem itself. This study aims to determine the needs of water in the sub-watershed
Kusambi Batulicin watershed. The targeted results will obtain the water balance suitability
data based on the water balance, obtain the data of the population residing around the research
area, and obtain the land based water management model. The method used to obtain the data
is done by descriptive quantitative (primary data and data secondary). From Class Unit land
for water availability is determined using runoff coefficient method based on land use
information and annual rainfall data. The water requirement is calculated from the conversion
to the population's viable living needs. This research uses the approach of the ecological area
of Watershed (DAS) which process analysis and presentation is done spatially by utilizing
Geographic Information System (GIS) technology. The result of the research is that the water
needs of the people of Tanah Bumbu Regency = (826.352.700/23.340)/365 = 97
liters/person/day, water requirement = (97.229 x 97 x 365)/1.000)/1.000.000 = 3,44 million
m3
/year. The amount of water required for fisheries in Kusambi sub-waters is 15
liters/second/hectare, and water requirements = ((1,13 x 15 x 24 x 60 x 60 x
180)/1.000)/.1000.000 = 0,53 million m3
/year, and the water supply of the Batulicin
Watershed Cusambi Sub-watershed with total water needs is still relatively surplus.
