İndeksli Yayınlar / Indexed Publications

Permanent URI for this collectionhttps://hdl.handle.net/11452/34996

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    Evaluation of pumping test data using analytical and numerical methods
    (IAHR-int Assoc Hydro-environment Engineering Research, 2015-01-01) Korkmaz, Serdar; Eryılmaz, Gökçen Türkkan; Mynett, A; KORKMAZ, SERDAR; Eryılmaz, Gökçen Türkkan; Mühendislik Fakültesi; İnşaat Mühendisliği Bölümü; Mynett, A; 0000-0002-3393-1632; AAG-8542-2021; ETJ-9151-2022
    In this study, the well performance and near-well hydraulic conductivity are determined through analytical and numerical methods applied to water level data obtained from pumping tests. For this purpose, a well was drilled in an unconfined aquifer in Bursa Kucuk Sanayi region. In the well, several pumping tests, namely, step-drawdown test, recovery test and multirate pumping test were performed. Hantush-Bierschenk and Rorabaugh methods were applied to the data from step-drawdown tests and discharge-drawdown curves were obtained. On the other hand, recovery test and multirate test were performed to determine the hydraulic conductivity. MODFLOW software, which solves groundwater flow problems using method of finite differences, was used for numerical modeling. In MODFLOW, simulations of the pumping tests were made for various cases related to grid resolution and specific yield. The discharge-drawdown curve of MODFLOW was compared to those obtained from analytical solutions and a good correspondance was observed. In addition to this, multirate pumping test modeled in MODFLOW yielded a similar hydraulic conductivity as the analytical solution.
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    Publication
    Wave climate simulation for the black sea basin
    (Iahr-int Assoc Hydro-environment Engineering Research, 2015-01-01) Van Vledder, Gerbrant Ph.; AKPINAR, ADEM; BİNGÖLBALİ, BİLAL; Mühendislik Fakültesi; İnşaat Mühendisliği Bölümü; 0000-0002-5422-0119; 0000-0001-6314-9118; 0000-0003-4496-5974; AAC-6763-2019; AAB-4152-2020; ABE-8817-2020
    This study investigates long-term variability of wave characteristic trends in the Black Sea basin over a period of 31 years. The state-of-the art spectral wave model SWAN was applied to hindcast 31-year of wave conditions. The simulation results were used to assess the inter-annual variability and long-term changes in the wave climate of the Black Sea for the period 1979 to 2009. The model was forced with Climate Forecast System Reanalysis winds, which is determined as the best wind source in Van Vledder and Akpinar (2015). To obtain accurate and reliable results the wave model SWAN was calibrated and validated against all, but limited, available measurements at offshore and near-shore locations located in different regions of the Black Sea. In the calibration process, we focus on especially white-capping and wind input parameters and recently developed formulations. Thus, for the Black Sea basin the best setting and model with the best configuration for the source terms in the wind-wave modelling is obtained. The results of the wave hindcast were also validated against satellite data to assess the spatial variability of wave model quality. From the simulation results, the seasonal and spatial variability of the mean annual significant wave height and wave energy period is obtained and discussed.