Give geographical reasons:

Salinity is less in the Bay of Bengal than in the Indian Ocean.

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1 Answers

Salinity is less in the Bay of Bengal than in the Indian Ocean because- 

1. The salinity of ocean water is a measure of the concentration of dissolved salts, which are mostly sodium chloride, but also include salts containing magnesium, sulphur, calcium and potassium. It is expressed as parts per thousand (%). 

2. The factors that affect the salinity of ocean water are rate of evaporation and quantitative supply of fresh water (primarily from rainfall and stream discharge) is being added to the ocean. 

3. The average salinity of sea water is 35% But salinity in the Bay of Bengal is as low as 31%. 

4. This is because huge discharge from the Ganga river system, the Peninsular River (Godavari, Krishna, etc.) and Irrawaddy enter the Bay of Bengal, thereby reducing its salinity.

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