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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 10, No. 2, 2013, pp. 221-230
Bioline Code: st13024
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 10, No. 2, 2013, pp. 221-230

 en Practical estimation and distribution of diffuse pollutants arising from a watershed in Turkey
Tanik, A.; Ozalp, D. & Seker, D.Z.


This study presents the diffuse pollution profile of a coastal watershed with respect to the dominating sector of agriculture including forestry. A rough estimation of the diffuse loads expressed by two major nutrients of nitrogen and phosphorous is realized by calculations based on unit loads obtained from literature for each land-use activity. The key concern is to rank the different diffuse loads arising from the watershed. The major diffuse nitrogen loads are estimated to arise from agricultural activities with 54%, followed by livestock breeding that contribute to the nitrogen budget by 11%. Almost 7% of the nitrogen loads come from meadows and pasture, and 5% from forests. In the distribution of diffuse phosphorus loads, it is estimated that 48% of the loads arise from agricultural activities, and 18% from livestock breeding. Almost 14% of the phosphorous loads come from septic tank effluents; however, 13% of the loads are due to rural run-off. The future loads for years 2028 and 2039 are also estimated; 30-40% decrease is foreseen in the agricultural pollutants and animal manure through the stepwise application of ecological agriculture and livestock breeding. The basic aim of this study is to put forth a practical methodology for estimating diffuse loads in a watershed for the decision-makers and local administrative authorities with limited available data especially. Through such, distribution of various diffuse loads becomes available among the administrative units composing the watershed.

Agricultural activities; Diffuse loads; Land-use distribution; Nitrogen and phosphorous; Population

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