SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Assessing the water-resources potential of Istanbul by using a Soil and Water Assessment Tool (SWAT) hydrological model 
Authors:Cuceloglu, G., K.C. Abbaspour and I. Ozturk 
Volume (Issue):9(10) 
Article ID:814 
URL (non-DOI journals): 
Broad Application Category:hydrologic only 
Primary Application Category:blue, green and/or gray water, or crop water productivity 
Secondary Application Category:calibration, sensitivity, and/or uncertainty analysis 
Watershed Description:20,790 km^2 drainage area that surrounds the Istanbul, Turkey metropolitan area. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:Uncertainties due to climate change and population growth have created a critical situation for many megacities. Investigating spatio-temporal variability of water resources is, therefore, a critical initial step for water-resource management. This paper is a first study on the evaluation of water-budget components of water resources in Istanbul using a high-resolution hydrological model. In this work, the water resources of Istanbul and surrounding watersheds were modeled using the Soil andWater Assessment Tool (SWAT), which is a continuous-time, semi-distributed, process-based model. The SWAT-CUP program was used for calibration/validation of the model with uncertainty analysis using the SUFI-2 algorithm over the period 1977–2013 at 25 gauge stations. The results reveal that the annual blue-water potential of Istanbul is 3.5 billion m3, whereas the green-water flow and storage are 2.9 billion m3 and 0.7 billion m3, respectively. Watersheds located on the Asian side of the Istanbul megacity yield more blue-water resources compared to the European side, and constitute 75% of the total potential water resources. The model highlights the water potential of the city under current circumstances and gives an insight into its spatial distribution over the region. This study provides a strong basis for forthcoming studies concerning better water-resources management practices, climate change and water-quality studies, as well as other socio-economic scenario analyses in the region. 
Keywords:hydrological modeling; SWAT; SWAT-CUP; water-resources modeling; water availability; water potential; Istanbul