NDLI: The Coleroon river flow and its effect on the Pichavaram mangrove ecosystem

Content Provider	Springer Nature Link
Author	Sathyanathan, R. Thattai, D. Selvam, V.
Copyright Year	2014
Abstract	The fresh water reaching an estuary fluctuates on many scales and the fluctuation in the flow over a time period is also due to the anthropogenic activities like construction of dams, diversions and upstream withdrawals. These fluctuations may have profound effects on the estuarine ecosystem, which usually has remarkable biological productivity and diversity. A desktop analysis is carried out by compiling historical records of discharge and other hydrological information to study the dynamics of the river Coleroon, a distributary of the Cauvery River, Tamil Nadu, India. Remote sensing analysis was carried out on images ranging from the years 1977 to 2008 and the changes in the Pichavaram mangrove areas adjoining the Coleroon were studied by comparing the results with the freshwater flow into the ecosystem. Environmental flow analysis indicates that the minimum flow needed for a healthy mangrove system in Pichavaram is 750.75 cumecs; however, this is currently achieved only 12 % of the time. The reduction in freshwater flow over the years has resulted in loss of species diversity and degradation of the mangroves; this needs to be corrected immediately to conserve the Pichavaram mangrove ecosystem.
Starting Page	309
Ending Page	322
Page Count	14
File Format	PDF
ISSN	14000350
Journal	Journal of Coastal Conservation
Volume Number	18
Issue Number	4
e-ISSN	18747841
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-03-30
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environmental flow Coastal ecosystem Mangroves Flow duration curve Pichavaram Geography (general) Coastal Sciences Oceanography Nature Conservation Remote Sensing/Photogrammetry
Content Type	Text
Resource Type	Article
Subject	Ecology Nature and Landscape Conservation Oceanography

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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