Estimation of diffuse pollution loads of pesticides in tersakan sub-basin of Yeşilirmak river

Download

index.pdf

Date

2019

Author

Ayyıldız, Ceren

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

214
views

126
downloads

Tersakan Creek is one of the highly polluted tributaries of Yeşilırmak River because it receives pollution loads both from discharges of the industrial facilities and run-off water of the agricultural areas in the sub-basin. A monitoring program was implemented to determine the water quality status of the sub-basin in accordance with the EU Water Framework Directive (WFD). The results of the water sample analyses revealed that concentrations of 22 pesticides, out of the detected 57 pesticides, exceeded the pre-defined environmental quality standards (EQSs). Some of the pesticides are discharged by industries; however, mass balance calculations showed that their contribution to the pollution was relatively lower. This implied that main contribution to pesticide load to the Tersakan Creek was attributable to diffuse loads from agricultural lands. This study aimed to estimate the agricultural diffuse pollution loads for pesticides exceeding EQSs in the Tersakan Creek, which is simply calculated through multiplying the sediment yield (estimated by a GIS based model, Dynamic Erosion Model and Monitoring System developed by the General Directorate of Combating Desertification and Erosion) by pesticide soil concentration (estimated by a pesticide fate and transport model PESTRANS). Results from a drainage area of the Tersakan Creek showed that suggested and reported application rates of the pesticides such as Cypermethrin, Alpha-cypermetrhin and Dichlorvos contribute to diffuse pollution loads causing the exceedance of EQSs at the Tersakan Creek. Furthermore, additional calculations were also performed to estimate the required maximum pesticide application rate not to exceed EQSs.

Subject Keywords

Pollutants., Pesticides, Sediment yield, Diffuse pollution load, Tersakan Sub-basin, Yeşilırmak River.

URI

http://etd.lib.metu.edu.tr/upload/12624867/index.pdf
https://hdl.handle.net/11511/45049

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Evaluation of eutrophication control strategies for the Keban Dam reservoir Soyupak, S; Mukhallalati, L; Yemisen, D; Bayar, A; Yurteri, C (1997-04-15) The reservoir of the Keban Dam in eastern Anatolia is a very deep and large water body subject to significant seasonal water level fluctuations within a given hydrological year. At the present time, different sections of the reservoir have different trophic status and the upper portion of the reservoir, in particular, is eutrophic. In this regard, there is a need for the assessment of alternative strategies to be implemented for phosphorus and thus eutrophication control in this segment of the reservoir. In...
Determination of environmental quality standard -based discharge limits and mixing zones for tersakan sub-basin of Yeşilirmak river Çelebi, Sarp; Ünlü, Kahraman; Department of Environmental Engineering (2019) The control of point source discharges to rivers has become more elaborate since the establishment of environmental quality standards (EQSs). Many countries including Turkey have set EQS values for various contaminants of concern (CoCs) i.e. maximum concentration limits that would not cause detrimental effects on the health of the human-beings or the overall environment. One important challenge of achieving these EQSs is to reconcile the effluent limits that are technically and economically achievable with ...
Evaluation of heavy metal contents, polyaromatic petroleum hydrocarbons and some inorganic pollutants in the south Marmara rivers, Turkey Yılmaz, Ayşen; Yemenicioglu, S; Aksoy, S; Torunoglu, T (1998-05-01) Nilufer River is the main receiving body of water for the industrial and domestic wastes of 1.000.000 populated Bursa metropolitan area and it combines with Kocasu River before entering the sea at the south Marmara region, Turkey. Variations in concentrations of Na, K, Ca, Mg, Fe, Cl, SO4, PO4, NH4, NO3, NO2, BOD5, COD, polyaromatic petroleum hydrocarbons (PAH), pH and some heavy metals (Hg, Cd, Cr, Zn, Pb) were seasonally determined in 1991-94 period. The results showed that these rivers are included in th...
Evaluation of the best management practices in a semi-arid region with high agricultural activity Özcan, Zeynep; Kentel Erdoğan, Elçin; Alp, Emre (Elsevier BV, 2017-12) The arid and semi-arid regions with water scarcity are vulnerable to several stressors such as urbanization, high water demand created by agricultural and industrial activities, point and non-point pollution sources, and climate change. Hence, proactive policies and sustainable water management strategies that are based on decision support systems are crucial in arid and semi-arid regions. Because of large expenses and implementation difficulties associated with the diffuse pollution abatement plans, many a...
ASSESSMENT OF EUTROPHICATION FOR KEBAN DAM-RESERVOIR SOYUPAK, S; Gökçay, Celal Ferdi; YERLI, S; ERDEN, S; AKBAY, N; CILESIZ, AF (1994-03-01) Water quality properties and trophic status of Keban Dam Reservoir have been assessed in detail. The dissolved oxygen contours exhibited somewhat unusual behaviour of temporarily established intermediate layers of low dissolved oxygen concentrations. The phytoplankton species were identified and their composition was evaluated. The reservoir is eutrophic in general terms. However, lotic and limnetic zones of the reservoir have shown different trophic status.

Citation Formats

C. Ayyıldız, “Estimation of diffuse pollution loads of pesticides in tersakan sub-basin of Yeşilirmak river,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Environmental Engineering., Middle East Technical University, 2019.