Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Assessment of Land Use Change Impacts on Hydrological Parameters in Porsuk River Basin - Turkey(01. Izmir Institute of Technology, 2023) Gündüz, Orhan; Gündüz, Orhan; Alp, Emre; 03.07. Department of Environmental Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyLand Use Land Cover (LULC) change is considered to play an essential role in river basin hydrology. Climate change, and increase in urbanization have disrupted the hydrological parameters pattern in Porsuk River Basin (PRB). The current study is aimed to investigate the LULC change impacts on surface runoff, groundwater, evapotranspiration, and lateral flow parameters in the five sub-basins of the PRB under different LULC development scenarios (1990 & 2006) and one climate period (1989- 2010) through hydrological modeling. In this study, the Soil and Water Assessment Tool (SWAT) model was utilized to analyze the hydrology of the river basin at watershed scale. The hydrological pattern characterization is based on five discharge gauges monitored by State Hydraulic Works (DSI) in the basin. The Kiranharmani, Parsibey, and Porsuk Ciftligi subbasins, the yearly increase in surface runoff reached 25%, 18%, and 12.91%, respectively, are more affected by landuse changes. The Scenario 2, contrary to Scenario 1, showed a noticeable reduction of groundwater infiltration in all subbasins with exception of Parsibey, due to rapid increased area of residential regions. In comparison to the 1990 LULC, changes in the 2006 LULC have a greater overall impact on hydrological processes in all sub-basins of the PRB. Therefore, it is believed that changes in specific LULC classifications can be linked to the reaction to changes in hydrological processes in a subbasin. Overall, this research is believed to be among the first to be done in the PRB, and the findings are thought to be helpful for water management.Master Thesis Modelling Rainfall-Runoff Processes in Kabul River Basin Using Arc Swat Model(01. Izmir Institute of Technology, 2020) Tanı, Hamidullah; Tayfur, Gökmen; Tayfur, Gökmen; 03.03. Department of Civil Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologySWAT model is applied to Kabul River Basin (KRB) located in Afghanistan to assess the runoff. KRB is located between latitudes 33 ﾟN and 37 ﾟ N, and longitudes 67 ﾟE and 74 ﾟE, with a drainage area of 72000 km2. This study (1) determines the most sensitive parameters that affect the catchment flow, (2) estimates monthly and daily flows of the basin from the available meteorological stations data, (3) calibrates and validates the simulated and observed flow data for different hydrological stations located in the basin, and (4) determines the total amount of surface runoff and water yield in the basin. SWAT-CUP is applied for the sensitivity analysis. Initially 27 different sensitive parameters effecting the runoff are tasted and 20 most sensitive ones are found. Among these, GWQMN.gw (Treshold depth of water in the shallow aquifer required for return flow to occur ), SMTMP.bsn (Snow melt base temperature), CN2.mgt (SCS runoff curve number II), PLAPS.sub (Precipitation lapse rate), and HRU_SLP.hru (Average slope steepness) are found to be the most sensitive parameters. The predicted flow is calibrated and validated against the measured flow for seven different Hydrological Stations both on a monthly and daily time scales. The performance of the model is checked by applying R2, NSE, and the RSR. Overall, the model's monthly simulation flow is superior to the daily simulation.