Abstract
A field study was conducted to determine the role of hydrochemical influence on the abundance and distribution of urea‐nitrogen in a tropical estuary. The dissolved urea exhibited prominent features of seasonal estuarine build‐up during low flow conditions. At times of high biological production, this parameter was correspondingly lower. The paper further studies the influence of physical factors like temperature and salinity (estuarine hydrography) as well as chemical factors like pH, DO, DOC and Chlorophyll‐a to bring out the associated features. The uptake of urea as a preferred nutrient during biological activity is also reported. Industrial or urban waste discharges did not contribute significantly to the abundance of urea for this part of the waterbody. The tropicality of nutrient cycling as revealed from urea‐nitrogen distribution signatures the phenomenal regional diversity.
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