Özet:

ABSTRACT The water as a vitial need in Life is also very important for a country or region. The amount and regime of the water is dependent upon the pltyscal fatures of the region. The need in water is increased duo. to growing industry and population. Further more, the transfer of the water to far region becomes easy by developing technology. These factors in return increase the usage but also lead to pollution of water. In this study, we investigated the potantial of the Karasu river (the resource of the Firat) and evaluated the physical factors effecting the charecter ofthe stream means offlow valus. The field of study is a techtonically compressed region in the east of Turkey. The field was raised as a result of compression on one hand and accumulation ofthe Lava eruption one the other hand. The field has gained a rough structure due to destruction by streams andfault. The study consist of three main sections. Section one descrides beifly the borders and general factures ofthe field while in section two the quantitative valuse of the stream and the factors effecting thes valuse have been investigated. Additronaly, the variation in run of values by the time have been analysed in order to defermine the risk factors. The conclusion and suggestions have been given in section three. Key Words : Hydrography, Hydrology, stream.rain-flow, Karasu, Erzurutn, Erzincan.

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