Call For Paper Volume:8 Issue:12 Dec'2021 |

FEASIBILITY ANALYSIS OF ELEVATION DATA FROM DEM FOR STUDYING THE MORPHOLOGICAL CHANGES OF THE RIVER

Publication Date : 18/12/2021


DOI : 10.21884/IJMTER.2021.8043.GOFN3

Author(s) :

Ardra Wilson , Vishnu B , Ardra Wilson.


Volume/Issue :
Volume 8
,
Issue 12
(12 - 2021)



Abstract :

The study was undertaken to assess the feasibility of using remotely sensed elevation data in the form of DEM (Digital Elevation Model) for studying the morphological changes of the river. The river reach from Kuttippuram to Pattambi of Bharathapuzha was selected as the site for investigation as it is severely affected by sand mining which clearly depicts the morphological changes in the river cross section. The evaluation was done by finding the difference between the cross-sectional area of the river obtained by actual measurement and that obtained from DEM. The study utilised CARTOSAT DEM imageries of the year 2014 to evaluate the cross-sectional details. 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. Total station survey was conducted at 21 locations in seven Kadavus of the river in order to obtain the actual cross-sectional data. The cross-sectional areas of the river obtained from the DEM showed an average percentage deviation of 4.32 per cent with that obtained from the field measured values. The study revealed that elevation profile obtained from DEM’s have sufficient accuracy for use in morphological analysis of rivers.


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FEASIBILITY ANALYSIS OF ELEVATION DATA FROM DEM FOR STUDYING THE MORPHOLOGICAL CHANGES OF THE RIVER

December 8, 2021