Modeling the water quality in Ulubat Lake

Download

index.pdf

Date

2007

Author

Yenilmez, Firdes

Metadata

Show full item record

Item Usage Stats

324
views

124
downloads

Lakes can be used for recreational purposes, agricultural irrigation, domestic water supply or industrial use. However, these functions of the lakes can be impaired due to excess nutrient loadings from industrial facilities, agricultural activities, and discharge of wastewaters from sewage systems. Uluabat Lake is one of the important lakes in Turkey faced with water quality problems due to excess nutrient loading from point and non-point sources. In this study, Water Quality Analysis Simulation Program (WASP Version 7.2), supported by the Environmental Protection Agency (EPA), was used to simulate the water quality of the lake. The model was calibrated using a set of data belonging to the time period from January 1st to June 1st, 2000, for dissolved oxygen (DO), chlorophyll-a (Chl-a), ortho-phosphate (PO4-P) and nitrate (NO3-N). An acceptable similarity was obtained between the predicted and observed water quality values in calibration. Then, the model was verified for another data set. Verification period was from 1st of June to 31st of December, 1999. Verification results were also coherent with the observed values. Following the calibration and verification, the model was used as a management tool to predict the future quality conditions for the lake for different management scenarios. According to the results, sediment dredging had a significant impact on the water quality. Additional methods on top of sediment dredging improved the quality of the lake. The best result was obtained when buffer zone was formed, phosphorus loads from the Mustafakemalpaşa District sewage system and Emet and Orhaneli Watersheds were decreased by 50% and 50% decrease was considered in the fertilizer usage throughout the agricultural lands, in addition to sediment dredging.

Subject Keywords

Environmental Engineering.

URI

http://etd.lib.metu.edu.tr/upload/3/12608612/index.pdf
https://hdl.handle.net/11511/16864

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Experimental Study on Maize Cob Trickling Filter-Based Wastewater Treatment System: Design, Development, and Performance Evaluation Ali, Imran; Khan, Zahid M.; Sultan, Muhammad; Mahmood, Muhammad H.; Farid, Hafiz U.; Ali, Mohsin; Nasir, Abdul (HARD Publishing Company, 2016-01-01) In developing countries, good-quality water is contaminated due to the disposal of untreated municipal and industrial wastewater (WW) into natural water reservoirs. Most of the wastewater is not treated properly according to international standards, and usually is disposed of and/or utilized for irrigation without appropriate treatment. The main hurdles in providing wastewater treatment (WWT) in developing countries include high costs, and the poor design, installation, and operation of conventional WWT sys...
Investigation of PCB pollution: method validation and case studies from Ankara Akduman, Nazan; İmamoğlu, İpek; Department of Environmental Engineering (2009) Polychlorinated biphenyls (PCBs) are persistent organic pollutants which were not produced in Turkey, however both national and international studies illustrate a measurable amount of PCB pollution in receiving environments, aquatic fauna and people. In this study, various information sources such as the national and international scientific literature, official records and reports are investigated to obtain information regarding PCB pollution in Turkey. Furthermore, various PCB pollution analysis technique...
Modeling natural attenuation of petroleum hydrocarbons (btex) in heterogeneous aquifers Uçankuş, Tuğba; Ünlü, Kahraman; Department of Environmental Engineering (2005) Natural Attenuation can be an effective cleanup option for remediation of Groundwater contamination by BTEX. One of the important aspects of the methodology that has been recognized recently is that mass removal rates, the most important parameters used to determine effectiveness of the methodology, is controlled by groundwater flow regime, which to a large extent controlled by aquifer heterogeneity. Considering this recognition, the primary objective of this research is to quantitatively describe the relat...
Assessment of PCB contamination, the potential for in situ microbial dechlorination and natural attenuation in an urban watershed at the East Coast of the United States Kaya, Devrim; Sowers, Kevin R.; Demirtepe, Hale; Stiell, Brian; Baker, Joel E.; İmamoğlu, İpek; Kjellerup, Birthe (Elsevier BV, 2019-09-15) Sediment contamination is a major environmental issue in many urban watersheds and coastal areas due to the potential toxic effects of contaminants on biota and human health. Characterizing and delineating areas of sediment contamination and toxicity are important goals of coastal resource management in terms of ecological and economical perspectives. Core and surficial sediment samples were collected from an industrialized urban watershed at the East Coast of the United Stated and analyzed to evaluate the ...
Transport of metals leaching from land-disposed oil field wastes Ünlü, Kahraman (SAGE Publications, 1998-12-01) The potential for groundwater contamination by metals leaching from land-disposed oil field exploration and production (E&P) wastes is an environmental concern. In this study a geochemical transport model is adopted to consider multispecies metal migration. Objectives are to characterize the chemical composition of E&P wastes, to evaluate the mobility and pollution potential of metals in E&P wastes and to investigate the utility of simplified modelling approaches. A chemical transport model coupling a hydro...

Citation Formats

F. Yenilmez, “Modeling the water quality in Ulubat Lake,” M.S. - Master of Science, Middle East Technical University, 2007.