The Rosetta branch receives Greater Cairo's wastewater, while fertilizer industries discharge in the Damietta branch (MWRI, 2005).
A wide variation in EC and TDS is observed in samples during both the seasons indicating the influence of climatic factors including rock water interaction as well as anthropogenic activities, such as increase in pumping, excessive use of fertilizers, and discharge of industrial effluents on the hydrochemistry of the study area.
The widespread use of nitrogen fertilizers, following discharges of agricultural and industrial effluents resulted in the pollution of aquatic environment and is the main cause of eutrophication (Karthikeyan et al. 2010; Manimaran et al. 2011).
One such site is the Salton Sea in Southern California, into which over 10,000 tons of nitrogen and phosphate fertilizers are discharged annually by three small rivers draining large tracts of irrigated agriculture.
Fertilizer: Fertilize "weakly, weekly".
Most researchers have focused on As pollution characteristics in wetland soil/sediment [ 3, 5, 12, 13] and their influencing factors such as soil properties (e.g., SOM, pH value, and Eh) [ 14, 15] and anthropogenic activities (e.g., wetland reclamation, application of fertilizers, and sewage discharge) [ 13, 15].
One of the problems associated with organic fertilizer factories is the discharge of leachate containing solid wastes.
However, in order to achieve both high nutrient levels for the plants and low nutrient and particulate loading in the fish tanks, suspended matter in the aquaculture component needs to be discharged and fertilizer needs to be added to the plants continuously.
However, phosphorus accumulation in the environment due to runoff from land treated with fertilizers and to the discharge of industrial and domestic waste, is a global problem which causes eutrophication of lakes, bays, and other surface waters.
Runoffs from farms that use Zn fertilizers and industrial discharges are among the major sources of Zn [24].
