The Pollution Load by Nitrogen and Phosphorus IN the Jadro River
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The objective of the investigations of the Jadro River, located in Croatia, was to estimate the nitrogen and phosphorus loads in the Jadro River spring and its streamflow by calculating the load in kg/day or tons/year and to compare this with the load for the maximum allowed concentrations (MAC) for drinking water (Official Bulletin, No 46/94) expressed in kg/day or tons/year.
Daily pollution loads at the Jadro River spring for total N ranged from 0 to 304 kg, for NH3-N from 0 to 38 kg, for NO3-N from 0–1321 kg and for PO4-P from 0–92 kg in the period from September 1993 to September 2003. When compared with MAC loads the results prove that the Jadro River spring is not polluted by nitrogen compounds and phosphorus.
The average annual load for total N ranged from 10 to 33 t, for NH3-N from 0.25 to 5.15 t, for NO3-N from 40 to 190 t, and for PO4-P from 0.3 to 11.5 t. The nitrogen compounds and phosphorus loads vary from one year to another without any constant decreasing or increasing trends. The annual average loads compared with the average annual MAC loads (especially for NH3-N and PO4-P) show that there were no threats of constant pollution of the spring.
The loads for total N and PO4-P along the Jadro River flow from the spring to the fishpond entrance were monitored over a five year period from September 1999 to September 2004. The results show no regularities. The highest annual total nitrogen load of 45 t was recorded at the entrance to the fishpond during the 2002/2003 period. The highest annual PO4-P load of 10 t was measured at the Vidović Bridge during the 2003/2004 period; however, the concentrations of N and P did not exceed the MAC concentrations which are prescribed for drinking water.
According to the investigation results of the daily and average annual loads compared with MAC loads for drinking water, it can be concluded that the Jadro River spring and its streamflow are not polluted by nitrogen and phosphorus.
Keywordstotal nitrogen ammonia nitrate total phosphorus Jadro River Croatia
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- AWWA: 1995, Standard Methods for the Examination of Water and Wastewater, American Public Health Association, Washington, DC.Google Scholar
- Benedetti, J., Francaviglia, R., Canali, S. and Sequi, P.: 1995, ‘Preventive measures under the italian code of good agricultural practice for the protection of waters from nitrates’, Croatian Waters 3(12), 283–288.Google Scholar
- Berbenni, P. and Galassi, G.: 1978, Chemica ed ecologica delle acque, Elas libri, Milano 43–46, 180–184.Google Scholar
- Bonacci, O.: 1987, Karst hydrology with special to the Dinaric Karst, Springer-Verlag, 184 pp.Google Scholar
- Coccosis, H., Burt, T. and Van der Weide, J.: 1999, Conceptual Framework and Planning Guidelines for Integrated Coastal Area and River Basin, Management United Nations Environment Programme Mediterranean Action Plan Priority Actions Programme Regional Activity Centre Split, Croatia, 85 pp.Google Scholar
- Graham, A. L.: 1995, ‘The Code of good agricultural practice for the protection of water with particular reference to form waste management plans’, Croatian Waters 3, 309–312.Google Scholar
- Jovanović, S., Bonacci, O. and Anelić, M.: 1986, Hidrometrija, Graevinski fakultet Univerziteta u Beogradu, Beograd, 35 pp.Google Scholar
- Niemi, J. S.: 1998, ‘The quality of river waters in Finland’, Eur. Water Management 1, 36–40.Google Scholar
- OECD (Organisation for Economic Cooperation and Development): 1982, Eutrophication of Waters Monitoring, Assessment and Control, OECD, Paris.Google Scholar
- Official Bulletin of Croatia: 1994, Croatian Standard for Drinking Water. No. 46. Government Printing Office, Zagreb.Google Scholar
- Štambuk-Giljanović, N.: 1994, Waters of Dalmatia, Institute for Public Health Split, Split, 254 pp.Google Scholar
- Štambuk-Giljanović, N.: 1998, Waters of Cetina River and its Catchemnt Area, Institute for Public Health Split, Split, 814 pp.Google Scholar
- Stanners, D. and Bourdeau, P. (eds): 1995, Europe's Environment. The Dobris Assessment Compiled by Eurostat together with other organisations, 455 pp.Google Scholar
- Statistical Compendium for the Dobris Assessment, Europe's Environment: 1995, Statistical Compendium for Dobris Assessment, Compiled by Eurostat together with other organisations, 455 pp.Google Scholar
- Urlich Hege and Heino Scaupp.: 1996, ‘Effects of agricultural laud use on the nitrate content of leakage and measures to avoid them’, Croatian Waters 4, 97–102.Google Scholar
- USEPA.: 1997, Monitoring Guidance for Determining the Effectiveness of Non Point Source Controls, Report EPA 841-B-96-004, U.S. Environmental Protection Agency, Office of Water, Washington, D.C.Google Scholar
- USEPA.: 1995, Compendium of Tools for Watershed Assessment and TMDL Development, Draft U.S. Environmental Protection Agency, Office of Water, Washington, D.C.Google Scholar
- Várallyay György.: 1995, ‘Soil and agrochemical aspects of sustainable development’, Croatian Waters 3, 277–282.Google Scholar