Ammonium and Nitrate Quality Simulation in GarGar rivers using QUAL2KW Model

For the determine the expected reactions of pollutants entering the river by the use of mathematical models is essential. These models are able to simulate the effects of existing and future loads and Help managers in their decision making. in the other words, Since the river water quality protection need to additional investments For the wastewater treatment or the collection systems and controls to create a drainage And may lead to limit the development activities in the river basin. Conservation of GarGar River, one of the branches of the Karun River and the water supply for domestic use, drinking, agriculture and aquaculture is the most important. The first step in managing water conservation awareness of the qualitative change them. Therefore, in this study a QUAL2KW mathematical model to simulate GarGar river quality was used. In order to model implement the necessary data for the years 91-1389 of Water and Power Authority, was prepared and In order to model implement the data divided into two categories: The first category (in Persian date Mehr 1389 -esfand 1390) in the calibrated model and The second category (in Persian date Ordibehesht 1391 -esfand 1391), available information was used for testing and verification. NO₃ and ₄NH parameters in GarGar river the simulation by model. validation results indicate The model have a good agreement with reality And according to studies conducted, The main sources of pollution in the river GarGar centers and villages can be named track wasteeffluent and sewage fish ponds inns and fish farming and agricultural drains.