STUDI BENTUK, JARINGAN DRAINASE, DAN HIDROGRAF DAERAH ALIRAN SUNGAI MENGGUNAKAN SIMODAS (STUDI KASUS DI PULAU SABU - NUSA TENGGARA TIMUR)
ABSTRACT: Watershed management
includes the identification of linkages between land use, soil, and water;
between the upstream and downstream area; and a system in the hydrology which
consists of the system input and system output. The system output from one
river basin system is the flood discharge river which is the integrator that
influenced by catchment area. River flood discharge is affected by wheather
Watershed acts as a regulator of the process especially in terms of hydrology. Hydrograph form, in general, is strongly
influenced by the nature of the rainfall, the length of the main stream slope,
the direction and shape of the watershed.
Research was conducted in Sabu Island, Nusa Tenggara Timur. The method
used was the spatial analysis and flood hydrographs. Data processing was done
by displaying spatial data in Arc View to perform the cutting process Daieko
watershed, Ladeke and Rainkore. Then, it was processed in data Elevetion Model
(DEM) of each watershed by Arc View. The
results showed that Ladeke Watershed is the most potential to flooding from the
Daieko and Rainkore with the flood peak was always high. Form of bird feathers
watershed flood peak discharge value was small with relative long time. Form a
broad basin with a river pattern of spread (radial) tended to produce values of
flood peak discharge. Radial form of the most sensitive watersheds and smallest
form parallel to the change of land was due to increasing flood discharge.
Keywords: shape of watershed,
the hydrograph, SIMODAS
Penulis: Ruslan Wirosoedarmo,
A. Tunggul Sutan Haji, Erlita Meidya Pramesti
Kode Jurnal: jppertaniandd100021
