Abstract

Generation of Lake Bathymetry Using Sonar, Satellite Imagery, and GIS
Track: Water Resources
Author(s): Remco Dost, Chris Mannaerts

Bathymetric information on lakes and reservoirs has important value in hydrology. Besides water level - volume - lake area or stage curve relationships, multi temporal comparison between bathymetries is an indicator for environmental changes like lake or reservoir sedimentation. From this information, lake ecosystem functioning, life times of reservoirs or erosion - sedimentation rates of catchments can be derived. Monitoring lake bathymetry has become attractive using recent advances in Global Positioning Systems, portable sonar sounders, remote sensing data and GIS software analysis tools. A methodology for rapid bathymetric survey and map generation, developed by the International Institute for Geo-information Sciences and Earth Observation (ITC) is described based on surveys performed in Europe, Africa and South America.

Remco Dost
ITC
P.O.Box 6
Enschede , Overijsel 7500AA
Netherlands
Phone: +31(0)534874405
E-mail: dost@itc.nl

Chris Mannaerts
ITC
P.O.Box 6
Enschede , Overijsel 7500AA
Netherlands
Phone: +31(0)534874210
E-mail: mannaerts@itc.nl