International Journal of Ecology and Environmental Sciences

International Journal of Ecology and Environmental Sciences


International Journal of Ecology and Environmental Sciences
International Journal of Ecology and Environmental Sciences
2020, Vol. 2, Issue 4
Hydrographical studies along the coastal waters off Mangalore and Padubidri, southwest coast of India

Shruthi, Lakshmipathi MT, Padmanabha A, Daggula Narshivudu

In this paper, attempt has been made to study the spatial and temporal variations of hydrographical parameters in the coastal waters off Mangalore and Padubidri, Southwest coast of India from September 2014 to May 2015. The air and water temperature ranged from 24.1 to 28.90C and 25.7 to 32.30C respectively, light extinction coefficient varied from 0.31 to 1.48m, total suspended solids ranged between 32 and 164mg/l, pH varied from 7.36 to 8.49, salinity fluctuated from 15 to 35PSU, dissolved oxygen ranged from 4.08 to 7.76mg/l. Concentrations of nutrients, viz. ammonia, nitrite and nitrate ranged from 0.78 to 20.32µg-at NH3-N/l, 0.06 to 11.70µg-at NO2-N/l and 0.08 to 39.77µg-at NO3-N/l respectively, phosphate and silicate varied from 0.10 to 2.80µg-at PO4-P/l and 8.35 to 52.35µg-at SiO3-Si/l respectively were recorded. The higher values of temperature, pH, ammonia and salinity were recorded during pre-monsoon season, nitrite and nitrate higher values were observed during post-monsoon season. In contrast, an increase in dissolved oxygen and silicate were observed during monsoon season. The studies revealed that the hydrographical parameters in the coastal waters off Mangalore and Padubidri exhibited considerable seasonal and spatial variations and are greatly affected by the monsoon system for southwest monsoon.
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How to cite this article:
Shruthi, Lakshmipathi MT, Padmanabha A, Daggula Narshivudu. Hydrographical studies along the coastal waters off Mangalore and Padubidri, southwest coast of India. International Journal of Ecology and Environmental Sciences. 2020; 2(4): 358-367.