Evaluation of the best management practices to control agricultural diffuse pollution in lake mogan watershed with swat model

Download

index.pdf

Date

2016

Author

Özcan, Zeynep

Metadata

Show full item record

Item Usage Stats

364
views

176
downloads

Lake Mogan which is located in Gölbaşı County, Ankara, Turkey is one of the most important wetlands of Turkey and it was declared as Special Environmental Protection Region in 1990. Total area of semi-arid Lake Mogan watershed is 970 km2 and dry farming is practiced approximately in 40% of the basin. Therefore, agricultural diffuse source pollution is a serious concern in the watershed. In the context of this thesis, the effects of implementation of different agricultural best management practices on sediment, total nitrogen and total phosphorus loads were evaluated by using Soil and Water Assessment Tool (SWAT). Meteorological data, digital elevation model (DEM), land use/land cover (LULC) map, soil properties and the information on agricultural practices are required to build SWAT model. The model was calibrated with SWAT-CUP for streamflow, sediment, nitrogen and phosphorus by using monthly data (2007 – 2010) from Yavrucak monitoring station. The model validation was carried out in Sukesen monitoring station for the same time period with calibration. With the calibrated and validated model, 11 different agricultural best management practice (BMP) scenarios were developed. The most efficient scenario in terms of pollutant load reduction was the one in which 30% reduction in fertilizer, no tillage and terracing were combined. This study aimed to help decision-makers to decide on the most efficient BMPs and thus to develop sustainable watershed management plans in Lake Mogan watershed and in watersheds showing similar characteristics with Lake Mogan.

Subject Keywords

Pollution., Water, Agricultural pollution., Agriculture

URI

http://etd.lib.metu.edu.tr/upload/12620154/index.pdf
https://hdl.handle.net/11511/25775

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Determination of nutrient loads in Mogan watershed through modelling approach Özcan, Zeynep; Kentel Erdoğan, Elçin; Alp, Emre (null; 2015-09-12) Lake Mogan which is located in Gölbaşı County, 20 km south of Ankara, Turkey is one of the most important wetlands of Turkey and it was declared as a Special Environmental Protection Region in 1990 because of its ecological value. Mogan Watershed which has an area of 970 km2 is dominated by agricultural land use. The ecological integrity in Lake Mogan is under threat due to high level of urbanization, industrial and agricultural activities. In this study, unit diffuse pollution loads resulting from differen...
Integrated Watershed Management for Lake Mogan with the focus of Agricultural Diffuse Pollution Özcan, Zeynep; Başkan, O; Düzgün, Hafize Şebnem; Kentel, Elçin; Alp, Emre (2015-09-25) Lake Mogan located 20 km south of Ankara, Turkey has a watershed area of 970 km2, and it is dominated by areas with dry agricultural practices (50%) and graze lands (31%). Intense agricultural activities and fast urbanization rates are the most important factors affecting the water quality in Lake Mogan. There has been several management alternatives suggested to improve the water quality in Lake Mogan. In 2008, the municipality implemented lake augmentation strategy to increase the water level since it dro...
Ranking of pesticides according to leaching potentials to groundwater for the selected river basins in Turkey – index-based approach Akay, Ayşe Ece; Yetiş, Ülkü; Dilek, Filiz Bengü; Department of Environmental Engineering (2016) Recently, identification of pollutant parameters in river basins of Turkey has been greatly concerned by the Ministry of Forestry and Water Affairs (MoFWA).In this respect, the intention of MoFWA is to identify the pollutants which would be included in monitoring programs as required by the regulations toward the protection of water sources, both surface and groundwaters. Among these identified pollutants, various pesticides appeared as important group of pollutants to be monitored. Given the fact that pest...
A review of plastic pollution in aquatic ecosystems of Turkey Çevik, Cem ; Kıdeyş, Ahmet Erkan; Tavşanoğlu, Ülkü Nihan ; Kankılıç, Gökben Başaran ; Gündoğdu, Sedat (2021-12-01) Turkey is one of the major plastic pollution sources in the Mediterranean and the Black Sea. This review summarizes present information, data, and legislation on plastic pollution in Turkish aquatic ecosystems. According to results derived from reviewed studies, both macro- and microplastic pollutions were documented in Turkish aquatic ecosystems. Most of the studies on plastic pollution in Turkish waters were performed in the marine environment while only four were conducted in freshwater environments. Spa...
Modelling and forecasting snowmelt runoff process using the HBV model in the eastern part of Turkey ŞORMAN, ALİ ARDA; ŞENSOY ŞORMAN, AYNUR; Tekeli, A. E.; Sorman, A. Ue.; Akyürek, Sevda Zuhal (Wiley, 2009-03-30) Snowmelt runoff in the mountainous eastern part of Turkey is of great importance as it constitutes 60-70% in volume of the total yearly runoff during spring and early summer months. Therefore, determining the amount and timing of snowmelt runoff especially in the Euphrates basin, where large clams are located, is ail important tusk in order to use the water resources of the country in an optimal manner.

Citation Formats

Z. Özcan, “Evaluation of the best management practices to control agricultural diffuse pollution in lake mogan watershed with swat model,” M.S. - Master of Science, Middle East Technical University, 2016.