Environmental Indicators
Environmental Indicators
6.3- Nutrients in Freshwater

The state indicator is used to show the current nutrient intensity and the time-wise trends in geographic variations. Widespread nitrogen and phosphorus entry from urban, industrial and agricultural sources to the water bodies can cause eutrophication.

Laboratory, Measuring and Monitoring Department of the Ministry of Environment and Urbanisation carried out Domestic and Industrial Pollution Monitoring Programmes in 2012, 2013, 2014, 2015, 2016 and 2017. Seasonal monitoring studies have been done in the basins: Ergene, Küçük Menderes, Gediz, North Aegean, Sakarya and Susurluk that have the highest pollution loads. As a result of the studies, rivers in these basins were found out to be at the class IV quality (highly polluted) water according to the By-Law on Surface Water Quality Management for all these years of monitoring.

GRAPH 36- NORTH AEGEAN (BAKIRCAY) BASIN NITRATE NITROGEN (mg/L)

In North Aegean Basin from 2013 to 2016, Ammonium Nitrogen, nitrite and nitrate has decreased.

 

GRAPH 37- ERGENE BASIN NITRATE NITROGEN (mg/L)

Sources: Domestic and Industrial Pollution Monitoring Programme Monitoring Reports (2017).

 

GRAPH 38- GEDIZ BASIN NITRATE NITROGEN (mg/L)

 

 

GRAPH 39- KUCUK MENDERES BASIN NITRATE NITROGEN (mg/L)

Sources: Domestic and Industrial Pollution Monitoring Programme Monitoring Reports (2017)

 

GRAPH 40- SUSURLUK BASIN NITRATE NITROGEN (mg/L)

Sources: Domestic and Industrial Pollution Monitoring Programme Monitoring Reports (2017)

 

GRAPH 41- SAKARYA BASIN NITRATE NITROGEN (mg/L)

Comparing yearly trends of the averages of the stations within the basins, generally a decrease is observed in 2017 in Nitrate.

 

GRAPH 42- AVERAGE NITRATE NITROGEN IN THE BASINS WITH HIGHEST POLLUTION LOADS (mg/L)

Notes:

1) Basin averages are arithmetic mean of the values from the stations in the basin.

2) Values below detection limits are asumed as zero.

3) No measurements were done in Susurluk and Sakarya Basins for 2013.

 

Sources: Domestic and Industrial Pollution Monitoring Programme Monitoring Reports (2017).