Kajian Hidro-Klimatologi Daerah Cirebon-Indramayu-Majalengka- Kuningan (Ciayu Majakuning)

Abstract

ABSTRACT
Case Study of Hidro-Climatology at Cirebon-Indramayu, Majalengka-
Kuningan (Ciayu Majakuning). Case Study Water balance calculation has been
conducted in the region of Cirebon, Indramayu, Majalengka and Kuningan or abbreviated
nicely as the Ciayu-MajaKuning region. The hidro-climatological component such as
evapotranspiration and precipitation were calculated using the NOAH Land-Surface Model
(LSM). Model output of monthly data used in the calculation span in the period of 2001-2007.
The model has grid box or model resolution of 25 km x 25 km. From the calculation, it is obtained
that the average of evapotranspiration in this region is 3.1 mm/day or 90 m/month. The maximum
value of 3.8 mm/day is occurred in May whereas the minimum value of 2.8 mm/day is occurred
in December. The highest monthly precipitation occurred in the mountain region (Kuningan)
of 450-500 mm/month. In this study area, the period of August-November is the water deficit
while the period of December-July is the water surplus period in term of water balance. From
district division point of view, Indramayu is the driest area, and gradually following the
topography height, Kuningan district is the wettest area. Implication of these results to water
management aspect is that the dry Area such as Indramayu needs more water supplies by
irrigation for agriculture. The sustainable of hydrology cycle path way from Kuningan and
Majalengka as the water resources because of highly precipitation to the downstream area
(Indramayu and Cirebon) where the precipitation are less is very important in this region.
Key words: Water balance, evapotranspiration, hydrology cycle, NOAH-Land-Surface Model