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Hydrological modeling is an important issue for
determining the hydrological responses of a basin
under several weather conditions. In order to model
the Yuvacik dam basin, semi-distributed hydrological
model studies were carried out with the Mike11 model.
The basin with a drainage area of 257.8 km2 is
located in 12 km South East of Izmit city in Turkey.
The largest peaks of inflow were observed when the
storm events occur due to both snowmelt and rain.
Therefore, observed flows for the period of 2001-2006
were grouped as daily and hourly storm events
according to the event types such as rainfall,
snowmelt or mixed events. Rainfall-Runoff Model (NAM)
module of the model was used for the simulation of
daily snowmelt and rain on snow events and Unit
Hydrograph Method (UHM) module was used for the
simulation of hourly rainfall events.
A new methodology is suggested for the determination
of Curve Number (CN) of the sub-basins by using the
fractional area and topographic index values combined
with hourly model simulations. The resulting CN
values were used in the UHM module and the suggested
CN approach has been validated with the classical
SCS-CN approach with GIS analysis.
determining the hydrological responses of a basin
under several weather conditions. In order to model
the Yuvacik dam basin, semi-distributed hydrological
model studies were carried out with the Mike11 model.
The basin with a drainage area of 257.8 km2 is
located in 12 km South East of Izmit city in Turkey.
The largest peaks of inflow were observed when the
storm events occur due to both snowmelt and rain.
Therefore, observed flows for the period of 2001-2006
were grouped as daily and hourly storm events
according to the event types such as rainfall,
snowmelt or mixed events. Rainfall-Runoff Model (NAM)
module of the model was used for the simulation of
daily snowmelt and rain on snow events and Unit
Hydrograph Method (UHM) module was used for the
simulation of hourly rainfall events.
A new methodology is suggested for the determination
of Curve Number (CN) of the sub-basins by using the
fractional area and topographic index values combined
with hourly model simulations. The resulting CN
values were used in the UHM module and the suggested
CN approach has been validated with the classical
SCS-CN approach with GIS analysis.