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Title: | Water quality variation and nutrient characteristics of Kodungallur-Azhikode Estuary, Kerala, India |
Authors: | Jayachandran, P.R. Nandan, S. Bijoy Sreedevi, O.K. |
Keywords: | Water Quality;Eutrophication;Nutrients;Estuary |
Issue Date: | Apr-2012 |
Publisher: | NISCAIR-CSIR, India |
Abstract: | Present study focussed on the water quality status in relation to various anthropogenic activities in the Kodungallur-Azhikode Estuary (KAE). Average depth of the estuary was 3.6 ± 0.2 m with maximum of 4.3 ± 0.4 m in the estuarine mouth. Dissolved oxygen showed an average of 5.1±1 mg/l in the water column, whereas the highest BOD value was noticed during monsoon period (3.1 ± 0.8 mg/l) which could be due to high organic enrichment in the water column. pH displayed slightly alkaline condition in most of the stations and it varied from 7.2 ± 0.5 in Station 7 to 7.5 ± 0.5 in Station 1. Salinity in the estuary displayed mixo-mesohaline nature with clear vertical stratification. High river discharge could have resulted in nutrients and silt loading into the estuary, which makes a highly turbid water column particularly during the monsoon period, which limits light penetration and subsequent primary productivity. Turbidity in the water column showed an average of 20.2 ± 15.8 NTU. Estuary was nitrogen limited during post and pre monsoon periods. Nitrate-nitrogen content in the estuarine water gave negative correlation with ammonia. |
Page(s): | 180-187 |
URI: | http://hdl.handle.net/123456789/13774 |
ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
Appears in Collections: | IJMS Vol.41(2) [April 2012] |
Files in This Item:
File | Description | Size | Format | |
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IJMS 41(2) 180-187.pdf | 273.38 kB | Adobe PDF | View/Open |
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