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|Title:||Seasonal variation of some physicochemical parameters of the Chilika lagoon (east coast of India) after opening the new mouth, near Sipakuda|
Behera, Durga Prasad
|Abstract:||Some physicochemical parameters [temperature, transparency, pH, salinity, dissolved oxygen (DO) and nutrients, nitrate, phosphate and silicate] were studied during February 2001 to January 2002 at five locations in Chilika lagoon. This study was undertaken to assess the impact of the new mouth opened at Sipakuda in order to facilitate water exchange between the lagoon and the sea. High values of temperature 35.3ºC and salinity about 32 ppt were noticed near the mouth during the hot and dry premonsoon and postmonsoon periods respectively. The overall average salinity ranged from 0.32 – 32.0 ppt recorded at the northern sector (Kalupadaghat) and near the mouth. The maximum secchi disc value was 0.91 m only. Dissolved oxygen content and pH ranged from 3.9 to 13.9 ml/l and 6.4 to 9.8 respectively. The nutrient contents showed distinct seasonal and spatial variation. Higher phosphate value than the nitrate is a noteworthy feature during the present study period, which could be due to the addition of phosphate through the land drainage. Visible changes have been noticed in spatio-temporal variations of physico-chemical parameters as a result of the opening of new mouth.|
|Appears in Collections:|| IJMS Vol.33(2) [June 2004]|
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