National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Rivers have been a subject of study by engineers and scientists who have been fascinated by their self-formed geometric shapes and their responses to changes in nature and human interference. Among various types of human interventions, indiscriminate extraction of sand and gravel is the most disastrous one, as it threatens the very existence of the riverine ecosystem. Bharatapuzha is a great victim of illegal sand mining. The mining activity is particularly very high in the stretch between Pattambi and Kuttippuram of Bharathapuzha river. The study was undertaken to assess the morphological changes utilising DEM imageries. The analysis and assessment of satellite imageries were carried out using the ArcGIS 10.3 software. The Elevation Profile add-in toolbar was utilised to create profile graphs by taking sections across the river course in ArcGIS and the morphological changes of the river were calculated by comparing the cross-section profiles for the time period 2000 to 2014. Profile graphs revealed an average change in river bed depth of 0.25 m and an average change of cross-sectional area of about 134.66 m2. The main cross-sectional changes in the river reach of Kuttippuram to Pattambi were channel deepening and channel widening.
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