Akademik Veri Yönetim Sistemi
EGU25, Vienna, Avusturya, 27 Nisan - 02 Mayıs 2025, sa.795, ss.1, (Özet Bildiri)
Deficit in water budget has a negative effect on society, environment
and economy. In order to mitigate these negative effects, it is
important to known how precipitation falling on the basin is shared by
streamflow, evapotranspiration, baseflow and infiltration; i.e., What is
the share of precipitation transferred to flow, returned to the
atmosphere through evapotranspiration or contributed to the basin
storage system through infiltration? Sharing water resources among
drinking and utility water, agriculture, animal husbandry, industry,
tourism, etc., is necessary and important for the sustainability. In a
simple water budget, the basic and traditional approach can be
accompanied by the methods such as Budyko curve, a method that can be
used in water budget calculation in hydrology. The Budyko curve consists
of a nonlinear relationship between the evaporation rate and the
dryness index and it defines the water- and energy-based limits of
evapotranspiration. In this study, a water budget approach based on the
Budyko curve is proposed by considering the monthly rainfall-runoff
relation. Firstly, the aim of the study is to determine whether Kucuk
Menderes River Basin in western Turkey complies with the Budyko curve;
and if yes, secondly, whether it changes over time, and if it does, how
it changes. The monthly total precipitation, and monthly average
temperature of meteorological stations and monthly average streamflow
were used. Assuming that there will be no change in the basin water
storage in the long-term, actual evapotranspiration will be taken as the
difference between the streamflow discharge and precipitation, and the
potential evapotranspiration will be calculated by the empirical
Thornthwaite method. From the application on the upstream and downstream
reaches, the river basin was found consistent with the Budyko framework
in general. However, according to the calculations made by using the
Budyko curve, higher flows than expected were obtained for the upstream
reach and lower flows than expected for the downstream reach of the
basin. Based on the results of the case study, the potential of Budyko
curve as a method to use in planning and management of river basin was
demonstrated. The study will also investigate the possibility of
extending the use of the Budyko curve to ungauged or nested basins.