Pilevneli, Tolga
There is a need to develop a methodology for cost-effectively assessing and monitoring the quality of surface waters, and controlling micropollutant discharges from point sources in a river basin. This study aims to develop a monitoring and control strategy by prioritizing micropollutants according to their potential hazard and exposure levels in the Yeşilırmak River Basin (YRB). The temporal and spatial variation in the occurrence of 295 micropollutants was assessed by adopting a statistical screening approach, and 25 micropollutants that were identified as cause of concern (CoC) micropollutants in the YRB were recommended as tracers of water quality monitoring. Based on the temporal variation, spring was suggested as the preferred micropollutant monitoring season. For the first time in the YRB, the applicability of adopting a fixed dilution factor (DF) strategy to control micropollutants in point source effluents was evaluated by calculating the DF for each point source. The results indicated that the fixed DF strategy fails to comply with reaching the target water-quality standards. Ecotoxicological risk assessment methodology developed by combining surface water and point source risk assessment methodologies was used to assess the risk level in each sub-basin. The results of the bivariate correlation analysis carried out indicated that the river water concentrations of 17 CoC micropollutants are correlated to basin characteristics. This information was evaluated together with the results of the DF and ecotoxicological risk assessments to propose a point source management strategy in the YRB. Incorporation of the proposed monitoring and control strategy will ensure that water quality monitoring is cost-effective and water-quality goals are achieved.


Hamid, Injila; Akıntuğ, Bertuğ; Sustainable Environment and Energy Systems (2022-7)
In terms of efficient and sustainable management of water resources of a basin, land use land cover (LULC) and climate change impact studies hold utmost importance. Land use change dynamics along with the climate change owing to greenhouse gas emissions are altering the hydrological response of river basins. This study therefore focuses on quantifying the combined impact of LULC and climate change on the water balance components of the Jhelum river basin using Soil and Water Assessment Tool (SWAT) hydrologi...
A study on dam instrumentation retrofitting
Yanmaz, Ali Melih; ARI, Onur (2011-02-01)
Continuous monitoring and inspection of large dams would provide means for proper rehabilitative actions to be taken on time which intend to maintain the desired safety throughout the physical life of dams. Comprehensive inspections can be carried out using a number of instruments. An ideal dam instrumentation system should provide time-dependent information about critical parameters so that possible future behaviour of the structure can be predicted. Numerous of the existing dams do not have adequate instr...
A Multi-Scale Approach for Improved Characterization of Surface Water-Groundwater Interactions: Integrating Thermal Remote Sensing and in-Stream Measurements
VARLI, Dilge; Yılmaz, Koray Kamil (2018-07-01)
The interaction between surface water and groundwater is recognized as a key process for effective management of water resources. However, scale dependency and spatial heterogeneity of the processes at the interface are limiting factors in the characterization of this process. A hierarchical, multi scale methodology has been devised and demonstrated to effectively and efficiently characterize the surface water-groundwater interaction along a 2-km reach in Kirmir stream, Turkey. Our methodology starts with i...
A reaction-transport-mechanical approach to modeling the interrelationships among gas generation, overpressuring, and fracturing: Implications for the Upper Cretaceous natural gas reservoirs of the Piceance basin, Colorado
Payne, DF; Tuncay, Kağan; Park, A; Comer, JB; Ortoleva, P (2000-04-01)
Predicting reservoir characteristics in tight-gas sandstone reservoirs, such as those of the Upper Cretaceous units of the Piceance basin, is difficult due to the interactions of multiple processes acting on sediments during basin development. To better understand the dynamics of these systems, a forward numerical model, which accounts for compaction, fracturing, hydrocarbon generation, and multiphase flow (BasinRTM) is used in a one-dimensional simulation of the U.S. Department of Energy's Multiwell Experi...
Development of water quality management strategies for the proposed Isikli reservoir
Gunduz, O; Soyupak, S; Yurteri, C (1998-01-01)
A two-dimensional laterally averaged hydrodynamic and water quality model (CE-QUAL-WS) is used to simulate the water quality behavior in the proposed Isikli Reservoir of the Ankara Water Supply System to determine appropriate strategies for the management of water quality.
Citation Formats
T. Pilevneli, “A RISK-BASED MONITORING AND CONTROL STRATEGY FOR MICROPOLLUTANTS IN A RIVER BASIN,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.