Volume No. 8 Issue No.: 4 Page No.: 997-1004 April-June 2014

 

STUDY FOR RESTORATION USING FIELD SURVEY AND GEOINFORMATICS OF THE KOLONG RIVER, ASSAM, INDIA

 

Bora Minakshi* and Goswami Dulal C.

Department of Environmental Science, Gauhati University, Guwahati (INDIA)

 

Received on : December 25, 2013

 

ABSTRACT

 

River engineering and the subsequent loss and fragmentation of Riparian habitats during recent centuries have had serious impacts on aquatic ecosystem. The Kolong River of Nagaon, Assam, India has also faced serious penalty of one of such radical engineering approach where the mouth of the river in Jakhalabandha was permanently closed during the year 1964 by constructing an earthen embankment across it, viz. the Hatimura dyke, with the chief objective of protecting Nagaon town against flood. The act of blocking has shattered the natural flow regime of the entire river leaving it in a moribund state. Here we briefly summarize the existing scenario of the study area with an emphasis on a possible river restoration technique. Seven well distributed sampling stations were selected for the study purpose. Water quality and hydrological parameters were determined using standard procedures. Base map, drainage map and landuse/ land-cover map of the study area were prepared (Database: Survey of India Topological sheets, LANDSAT satellite imagery and IRS LISS-III satellite imagery) for acquiring a broad apparition about the geo-environmental setting of the study area. Results of the present study reveal the fact that a restoration paradigm is essential for management of the riverís health and ecosystem. A framework of the restoration program is discussed.

 

Keywords : River engineering, Aquatic ecosystem, Kolong River, Earthen embankment, Flow regime, River restoration, LANDSAT

 

 

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