Person: KATİP, ASLIHAN
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KATİP
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ASLIHAN
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Publication Spatial and temporal changes in water quality parameters of a shallow lake(Gheorghe Asachi Technical University of Iasi, 2015-10-01) Karaer, Feza; Katip, Aslıhan; İleri, Saadet; Sarmaşık, Sonay; Aksoy, Ertuğrul; Öztürk, Cihat; KARAER, FEZA; KATİP, ASLIHAN; İleri, Saadet; Sarmaşık, Sonay; AKSOY, ERTUĞRUL; Ziraat Fakültesi; Toprak Bölümü; 0000-0001-5969-4180; AAH-2993-2021; AAH-3984-2021; KGL-1554-2024; FDU-0542-2022; DQX-6698-2022This article presents the result of investigation on the spatial and temporal changes in water quality of Uluabat Lake. It examines the relationship between water and sediment quality parameters, and assesses the factors affecting eutrophication. Water and sediment quality are examined at 8 stations in the lake between May 2008, and May 2009. Water and sediment quality parameters measured are T, pH, EC, SD, NH4-N, NO3-N, TN, PO4-P, TP. Also DO, alkalinity, hardness, SS, BOD, COD, Chl-a parameters in water and organic matter content in sediment are measured. SS, Chl-a, TP concentrations showed their maximum value in the summer (122.75 mg L-1, 43.87 mg m(-3) and 0.48 mg L-1 respectively), and their minimum value during winter (12 mg L-1, 6.80 mg m(-3), 0.076 mg L-1 respectively). TN indicated a maximum concentration in summer (23.23 mg L-1) and a minimum during spring (3.89 mg L-1). This study reveals the importance of relationships between temperature DO and nutrients in water. Effect of pH, relation of temperature, conductivity with all nutrients in the sediment, and the differences between the seasons are designated as statistically significant. Water pollution has measured extremely high in station 8 according to Chl-a, BOD and COD parameters, and station 1 indicates the same situation with respect to nitrogen parameters. The results revealed the importance and the need for strict control of point and non-point pollution loads for the preservation of the Uluabat Lake's water quality. Compliance requirements should be set up for activities that could adversely affect water quality.Publication Modeling of microbial contamination in the marmara sea, Bursa-Turkey(Triveni Enterprises, 2020-03-01) Katip, Aslıhan; KATİP, ASLIHAN; Mühendislik Fakültesi; Çevre Mühendisliği Bölümü; FDU-0542-2022Aim: The main objective of this study was to design and develop the feed forward neural network (FNN) model structures for forecasting of faecal coliform concentrations and microbial water quality in Gemlik, Karacabey and Mudanya coastal areas alongside the Sea of Marmara, Turkey.Methodology: Artificial neural networks (ANNs) are modeling tools for environmental parameters, especially water quality and provide working of inter-related multi parameters. In this study, 4 model structures were implemented to forecast the faecal coliform concentrations for the sea coasts of "Gemlik, Karacabey and Mudanya" alongside the Marmara Sea. Total coliform and faecal streptococci were input parameters. The Levenberg Marquardt algorithm was applied for training the modeling studies. The results of the models were crosschecked with the real concentrations according to performance functions root mean squared error (RMSE).Results: Comparison of the modeling results with the measured concentrations demonstrated that established model structures provided correct results. (R) Correlation coefficients were determined between 0.57 and 0.98. It was observed that during the trials enhancing the hidden layer counts in the model structures did not increase the model performance in each test. Kind and count of inputs affected the model productivity. The growing rates of the coliform group bacteria were dissimilar because, different types of contaminants in the seawater affect the metabolism. The error values of the forecasting results applied in Gemlik and Mudanya Coasts were larger because there were large quantities of pollution loads and pollutant diversities.Interpretation: The developed model structures could predict the microbial contamination in the coastal environments and provided information on the more effective integrated sea coast management and protection of human health.Publication Bioaccumulation of trace metals in wastewater-fed aquaculture: A case study in Turkey(Hard, 2019-01-01) Katip, Aslıhan; KATİP, ASLIHAN; Mühendislik Fakültesi; Çevre Mühendisliği Bölümü; FDU-0542-2022This study investigated the suitability of wastewater from secondary treatment used in breeding fishes of Carassius gibelio species, and using this fish for human food. For this purpose, metals (Fe, Mn, Cu, Ni, Zn, Cr, Pb, Cd, As and B) in treated effluent and muscle, gill and liver tissues of fish were examined seasonally. It was found that treated effluent was suitable for irrigation and partially available for aquaculture, and the concentrations in fish tissues were over standard values. The values in liver and gill were higher than muscles. The TF (transfer factor) values of all metals examined were observed as >1 in the three tissues and the metals caused bioaccumulation. Concentrations in muscles were found to be 10 to 1000 times higher than in water. Size order of TF and BCF (bio-concentration factor) values in eatable muscle tissue were the same and it was Zn>Fe>Pb>Cu>Ni>Cd>As>Cr>Mn>B. Concentration differences among the tissues for As, Cd, Pb, Ni and B were not significant (P>0.05). Because the correlations between Cd, Mn, Pb and Cu concentrations in tissues and treated effluent were found to be statistically significant, the metals caused bioaccumulation because of treated effluent. HQ (hazard quotient) and BCF values of Pb in muscle had carcinogenic risk levels.Publication Determination of the trophic state of lake Uluabat (Bursa-Turkey)(Foundation Environmental Protection & Research-fepr, 2015-01-01) Katip, Aslıhan; İleri, Saadet; Karaer, Feza; Onur, Sonay; KATİP, ASLIHAN; İleri, Saadet; KARAER, FEZA; Onur, Sonay; Mühendislik Mimarlık Fakültesi; Çevre Bölümü; 0000-0001-5969-4180; AAH-3984-2021; KGL-1554-2024; FDU-0542-2022; FTS-9841-2022Eutrophication has become a widespread matter of concern during the last 50 years. Because of the relationship between biotic and abiotic factors, the determination of the trophic level of lakes is important. In this study, the trophic level of Lake Uluabat was determined using different trophic states indices (TSISD, TSICHL, TSITp, and TSITN) in 8 stations between May-2008 and May-2009. As a result, the indices were above the eutrophic level during the year. With regard to the seasonal variations of the indices, the highest values were in the summer and autumn (hypertrophic), while the lowest values were in the spring and winter seasons (hypertrophic-eutrophic). It was seen that in addition to nitrogen and phosphorus, temperature affected the growth of algae in the summer. For this reason, Chl-a (maximum 43.87 mg/m(3)) and alkalinity (maximum 282.85 mg/L) concentrations raised, and the dissolved oxygen (minimum 5.08 mg/L) concentrations decreased in the summer. It was observed that the diversity of the aquaculture species (fish and algae) decreased and the species having low economic value were dominant with an increase of the eutrophication level. According to the ratio between the nitrogen and phosphorus and a significant statistical correlation between nitrogen forms and chl-a, the algae species were co-limited by nitrogen with phosphorus the whole year and might be species that were each limited by different nutrients. The high diversity of species in the Lake, discharging of untreated domestic wastewater and chemical fertilizer usage were determined as the reasons of the co-limitation of the nitrogen with phosphorus. Also according to the trophic level and concentration values, Lake Uluabat exceeded the limit for potable water and water-oriented recreation.