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Tidal cycle and the environmental features of Cochin backwater (a tropical estuary)

DRS at CSIR-National Institute of Oceanography

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Title Tidal cycle and the environmental features of Cochin backwater (a tropical estuary)
 
Creator Qasim, S.Z.
Gopinathan, C.K.
 
Subject Aquatic Ecology, Productivity
primary production
chlorophylls
alkalinity
nutrients (mineral)
seston
pH
dissolved oxygen
salinity
temperature
backwaters
tidal cycles
ISW, India, Kerala, Cochin
 
Description In the Cochin Backwater, Kerala, India the tides are of a mixed, semidiurnal type with a maximum range of about 1 m. Two high and two low water-marks occur each day, with an appreciable difference in range and time. The various environmental features such as temperature, salinity, dissolved oxygen, pH, seston, nutrients, alkalinity and chlorophyll are greatly influenced by the tidal rhythm. The differences in almost all these parameters are more marked at the surface than at the bottom. The magnitudes of variation are not consistent and largely depend upon the time of the year. Diurnal changes in dissolved oxygen followed the course of daily sunlight intensity. Gross primary production gave a similar day and night cycle. Because of high turbidity in the estuary, the primary production was much higher at the surface than at 1 m
 
Date 1993-12-12T09:56:28Z
2017-09-29T13:47:23Z
1993-12-12T09:56:28Z
2017-09-29T13:47:23Z
1969
 
Type Journal Article
 
Identifier Proceedings of the Indian Academy of Sciences B, vol.69; 1969; 336-348
http://drs.nio.org/drs/handle/2264/5955
 
Language en
 
Relation P Indian Acad Sci B
SCI
 
Publisher Indian Academy of Sciences, Bangalore