Browsing by Author "Şahin, Ü."

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Evaluation of Irrigation Scheme Performance of Asagi Pasinler Plain (2012-2016)
(Centenary University, 2018) Kiziloğlu, F.M.; Şahin, Ü.; Diler, S.; Çakmakci, T.; Öztaşkin, S.
Undesirable levels of system performance in the irrigation project areas may lead to crop production losses and a decrease in sustainable irrigation area. Whether or not the expected benefits of irrigation investments aimed at transforming limited water resources into economic benefits by providing an increase in crop production can be understood from the monitoring and evaluation results of irrigation performances. This research was conducted to evaluate the irrigation system performance of Asagi Pasinler Plain irrigation project area which is managed by the Aras Irrigation Association between 2012 and 2016. As a result of the survey, it was determined that the annual net water supply ratio for the area of total 4610 and net 3900 hectares opened for irrigation in 2012-2016 is between 5.25 and 10.68 and the annual total water supply ratio varies between 2.23 and 4.54. Sustainable irrigation area ratio was between 25.64% and 51.28%. The production rate ratios in these years are between 15.20% and 38.48%, and the profitability ratios have changed over a very wide range from-0.11 to 9.32. The financial efficiency ratio is between 5.66% and 87.36%, the financial adequacy ratio is between 0.96 and 4.72, and the collection rate is between 29.70% and 100%. © 2018, Centenary University. All rights reserved.
Management of Clean Water and Wastewater Sources in Van Agricultural Areas
(Centenary University, 2016) Çakmakci, T.; Şahin, Ü.; Kuşlu, Y.; Kiziloğlu, F.M.; Tüfenkçi, Ş.; Okuroğlu, M.
Van province territory constitutes 2.5% of Turkey’ land with land of 19.069 km2 and is located in a position approximately 374.500 hectares of agricultural land. Although having potentially for irrigation, only 50 % of the agricultural land (260.000 ha) colud be irrigated. For non-irrigated areas, the low quality of water, inadequate irrigation water, and difficulties in delivering water to fields and lack of investment for the closed transport system can be considered as limiting factors. Total 4 dam lakes (reservoir), including one under constructions and nearly 15 lakes and ponds are situated in the provincial border. As waste water potential, treatment plants in city have been active in 5 of them and 2 of them are under construction. Annually 60 million tons of sewage waste water is discharged into rivers and Lake Van by Van province sewer line. By using this water for agricultural purposes, a certain amount of water will be provided to non-irrigated areas. In this study, with the current water situation in agricultural areas of Van province potential use of irrigation water and waste water. © 2016, Centenary University. All rights reserved.
Wastewater Treatment in Constructed Wetlands and Suggestions for the Use of Constructed Wetlands in Cold-Climate Regions
(Centenary University, 2017) Çakmakci, T.; Şahin, Ü.; Kiziloğlu, F.M.; Tüfenkçi, Ş.; Kuşlu, Y.; Erkuş, F.Ş.
In recent years, the depleting water resources in response to the increasing need for water along with increase in population have led researchers to search new water resources. Among these sources, the most spectacular one is the use of polluted waters after treatment. One of the alternative methods for the treatment of wastewaters is constructed wetlands. This treatment mechanism is preferred due to its effectiveness in the removal of pollution and pathogen microorganisms as well as its economic contribution. Constructed wetlands are widely used in regions with warm climates, while in cold climate conditions, low temperatures result in decreased treatment efficiency. In this study, the use of constructed wetlands in cold climate conditions has been reviewed and necessary suggestions reported. © 2017, Centenary University. All rights reserved.