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Paper Information

Journal:   IRANIAN SCIENTIFIC FISHERIES JOURNAL   Spring 2003 , Volume 12 , Number 1; Page(s) 1 To 20.
 
Paper: 

THE EFFECTS OF DAM CONSTRUDION ON TEMPERATURE, PH, SALINITY, ALKALINITY AND HARDNESS OF WATER ALONG HANNA RIVER CONTINUUM

 
 
Author(s):  ESTEKI A.A.*
 
* Oman Sea Fisheries Research center, Bandar Abbas, Iran
 
Abstract: 

The variations of pH, alkalinity, salinity and hardness were measured and compared in different sampling sites in headwaters of Hanna river and Hanna reservoir and its outflow.
The results showed that the headwaters were saline and hard and had relative higher alkalinity with stable pH. But due to extended biological activities exerted by lentic condition, the salinity, hardness and alkalinity were modified in the reservoir. The pH of the water column of reservoir were not constant and showed significant daily and annual changes and reached to a high mean value of 9.7 in mid summer. The magnitude values of above mentioned chemical parameters in the Hanna river, or in the other hand, in outflow of reservoir were usually lower than reservoir and higher than headwaters.
Apart from existence of hot summer and very cold winter days, there were no observed thermal stratification in the water column of the reservoir. In summer, the stratification was eliminated by the blowing of severe winds in addition to hydraulic pressure exerted by waves of larger and shallower area of the reservoir on smaller and deeper part and on the other hand, in winter the stratification of water temperature can be observed because of calm weather and freezing the reservoir surface.

 
Keyword(s): TEMPERATURE, PH, SALINITY, ALKALINITY, HANNA RIVER, ISFAHAN PROVINCE IRAN
 
References: 
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