Quality Assesment of Physical and Chemical Indices of Seasonal River Dams Water (Case Study, Kerman Ghadruni Dam)

The aim of this study is to investigate water pollution in the reservoirs of seasonal river dams and to provide management suggestions to reduce pollutions. In order to establish future management strategies, we examined the quality control of water parameters in seasonal rivers. Ghadruni dam basin is one of the sources of supplying the drinking water of two cities and has a special geographical position. With the increase in the population of the region due to its industrial nature, pollution can enter the reservoir in the near future. Due to using large amounts of chemical fertilizers in the lands around the seasonal rivers, we expect that runoffs from agricultural lands, which flow into seasonal watercourses, affect the quality of their water more than permanent rivers. Rural residential areas are located near these two rivers (Hotkan and Ghadruni). For this purpose, sampling of 6 stations on the dam feeding streams and the reservoir itself has been done. We measured the biological and chemical properties of the water; because they may change due to the entry of agricultural runoff. We measured chemical and biological parameters such as dissolved solids, Temperature, EC, PH, Turbidity, chloride, sulfate, nitrite, nitrate, ammonium, DO, COD, and nitrogen for one year, The obtained results were evaluated and analyzed. The results of studies show that the most important reasons for pollution in the Ghadruni dam basin is the impact of agricultural effluents and domestic and industrial sewage left in the system. Parameters such as EC - dissolved solids, nitrite, nitrate, sulfate, and chloride at the sampling stations had relatively high values. Also, PH values and water temperature were highly different, The problem of pollution in the dam, which is fed by the Ghadrun and Hotkan rivers, can be solved by collaboration between the respected organizations and water resources management plan in this basin.