Determination of Physical & Chemical Properties of Water of Khersan River & Investigation on Its Yearly Changes

Subject Areas : environmental management

Majid Abbaspour ¹ , Amir Hossein Javid ² , Avin Habibi ³

1 - Professor, Faculty of Mechanic, Sharif Industrial University
2 - Associate Professor, Faculty of Energy and Environment, Science and Research Unit, Tehran Islamic Azad University
3 - M.Sc. Environment (Pollution), Faculty of Energy and Environment, Science and Research Unit, Tehran Islamic Azad University

Received: 2012-01-10 Accepted : 2012-02-20 Published : 2014-02-20

Keywords: Khersan, Physical and Chemical Paramete, Water,

Abstract :

Background and Objective: Rivers are one of the most important water resources with a wide scopeof applications. On the other hand, any entrance of polluting items into rivers may cause differentphysical and chemical changes. Therefore it is necessary to have a good knowledge of theseparameters and changing process of them. Meanwhile Khersan River is one of the greatest headbranchof Karoon as the most important of State’s rivers. This is due to supplying of major part ofrequired water for civil, rural, agricultural purposes. The present paper intends to specify any physicaland chemical parameters of Khersan River (including Nitrate, Phosphate, Liquid oxygen, BiochemicalOxygen demand, Temperature & pH). It is accompanied with a study of annual changes of it. Sincethere was not a real research on Khersan River with such dimensions, therefore it could be useful inthe field of different applications most of which is dam construction on the concerned river.Method: In order to perform some physical and chemical tests, we performed 12 steps of sampling onmonthly basis. All water samples belonged to 6 stations through the river way. We applied standardsampling method and test procedures.Findings and Discussion: According to the findings, there is maximum rate of water temperaturechanges at concerned stations through July & August. Therefore it may find a reducing process andminimum rate in February as well. pH rate of water was in optimized scope in all stations and throughall months of the year (6.5-9.5 mg/liter). It was at minimum rate at all stations through the September& October. The quantity of liquid oxygen in water was in optimized scope (more than 5 mg/liter) inall stations and all months of the year. Then it may reach to the minimum rate through July & Augustand then to its maximum amount in winters. Biochemical oxygen demand of water had the maximumrate at station No. 1 in the middle of October. Generally we had biochemical oxygen demand morethan permitted maximum rate. The process of nitrate changes in all stations was in optimized scope inall months of the year.Conclusion: Any agricultural activities and distribution of agricultural lands besides this river andalso presence of neighboring villages and civil areas, have great roles in pollution of the river water.

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