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Öğe Understanding human–aquifer interactions using fuzzy cognitive mapping approach at the Palas Basin(Landscape and Ecological Engineering, 2025) Soylu, Mehmet; Dadaser Celik, FilizThe complex relationships between social and environmental systems create challenges for environmental sustainability. In this study, we used the fuzzy cognitive mapping approach to investigate human–aquifer interactions at the Palas Basin (Kayseri, Türkiye). Cognitive maps are casual maps that reflect the perceptions and understandings of different people/groups. With this approach, we aimed to reveal how goals, perceptions, and understandings of water users/managers affect the groundwater system in the Palas Basin. The cognitive maps were drawn with farmers and state officials and transformed into adjacency matrices for further analyses. Graph theory indices (indegree, outdegree, centrality, density, complexity, hierarchy index) were calculated to characterize maps. The maps of farmers and state officials were compared using the Mann–Whitney U test. Social cognitive maps were prepared by combining individual cognitive maps. Neural network computational method was used to reveal the response of the system to different management scenarios. This study pointed to the importance of irrigation/irrigated agriculture is for the Palas Basin. Increasing agricultural yields and profits by expanding the cultivation of high water consuming crops and irrigation/fertilization was found to be the priority of people. Both farmers and state officials think that groundwater levels go down due to extensive pumping in the basin. However, farmers are still more focused on short-term economic gains rather than the sustainability of the agricultural system. Fuzzy cognitive mapping approach provided an effective tool for revealing the understandings of water users/managers about the groundwater system. The information obtained in this study could be used in the future for groundwater management in the Palas Basin.Öğe An Evaluation of the Environmental Problems of Burdur Lake Basin(Erciyes Üniversitesi Fen Bilimleri Enstitüsü Fen Bilimleri Dergisi, 2023) Soylu, Mehmet; Dadaşer Çelik, Filiz; Kaçıkoç, MeltemBurdur Lake is a closed-basin lake, located in the Mediterranean region of Türkiye. In this study, the studies conducted in the Burdur Lake and Burdur Lake Basin were examined in an attempt to determine major environmental problems in the region. Research directions for solving environmental problems were also evaluated. This study examined 150 studies published between 1976 and 2022. The studies were classified into seven categories based on the research topics: Biodiversity/Ecology, Hydrology/Hydrological Change, Land Cover Change, Water Quality, Climate Change, Socio-Economic Impact, Environmental Policies/Recreation. Majority of the studies were related to Biodiversity/Ecology topic. This was followed by the Hydrology/Hydrological Change and Environmental Policies/Recreation studies. There is a consensus that the major threat toward Burdur Lake is the alteration of its flow regime. Ecological and land cover changes were also mentioned. The number of studies about Burdur Lake has increased rapidly in the last ten years. The increase in environmental problems in the Burdur Lake is most probably responsible for this trend. Climate change, which can be among the future pressure factors for Burdur Lake, has not received sufficient attention yet. We recommend that the future studies consider climate change effects on the hydrologic and ecological system.Öğe Climate Change Impacts on Potential Groundwater Recharge in the Palas Basin, Turkey(EJENS (European Journal of Engineering and Natural Sciences), 2022) Soylu, Mehmet; Dadaşer Çelik, FilizClimate change poses a major threat for sustainability of groundwater resources. In this study, we aimed to determine how climate change can affect groundwater recharge potential in the Palas Basin. Palas Basin is a semi-arid closed basin located in Kayseri, in the central Anatolia region of Turkey. Agriculture is the major economic activity in the region and groundwater is used extensively for irrigation purposes. In this study, we estimated potential groundwater recharge for the Palas Basin under two representative concentration pathway (RCP) scenarios (RCP4.5 and RCP8.5) projected by the HadGEM2-ES, MPI-ESM-MR, GFDL-ESM2M global climate models. All models projected a decrease in mean annual potential groundwater recharge under the RCP8.5 scenario. Under the RCP4.5 scenario, the trends in annual potential groundwater recharge were downward according to the HadGEM2-ES and MPIESM-MR models but slightly positive according to the GFDL-ESM2M model. For the sustainability of groundwater system and agricultural activities in the basin, climate change adaptation strategies should be developed for the agricultural sector.Öğe Groundwater Vulnerability Mapping Using DRASTIC Model: A Case Study at the Palas Basin in Turkey(EJENS (European Journal of Engineering and Natural Sciences), 2022) Bozdoganlio, Uğur; Soylu, Mehmet; Dadaşer Çelik, FilizThe study aims to estimate groundwater vulnerability against pollution at the Palas Basin (Turkey) by using geographical information system based DRASTIC model. A DRASTIC model integrates information for seven hydrogeological parameters: depth to water (D), net recharge (R), aquifer media (A), soil media (S), topography (T), impact of vadose zone (I), and hydraulic conductivity (C), and identifies spatial vulnerability. The study area, Palas Basin, is a hydrologically closed, agricultural basin, where groundwater is used for meeting irrigation and municipal water requirements. Seven hydrogeological parameters were combined to classify the basin into three vulnerable zones (as low, moderate, and high). The central part of the basin was identified to be highly vulnerable, while the eastern and southern parts were characterized by moderate to low vulnerable areas. Intensive agricultural activities, widespread in the central basin, create high pollution potential. This study showed that the DRASTIC approach provided a simple and efficient tool for evaluating groundwater vulnerability. The results can be used by water managers in groundwater management in the Palas Basin.
