Inversion of Lake Bathymetry through Integrating Multi-Temporal Landsat and ICESat Imagery
Yuannan Long1,2,3, Shixiong Yan1, Changbo Jiang1,2,3
1School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China.
Sensors (Basel, Switzerland)
|July 3, 2019
Summary
This study integrates satellite imagery and laser altimetry to accurately map lake bathymetry. The novel approach overcomes limitations of traditional methods, achieving precise depth measurements for improved lake management.
Area of Science:
- Earth Observation
- Geospatial Analysis
- Hydrology
Background:
- Traditional lake bathymetry methods (sonar, unmanned ships) are accurate but time-consuming and difficult.
- Optical remote sensing offers ease of use but lacks accuracy, especially in turbid waters.
Purpose of the Study:
- To enhance the accuracy of lake bathymetry measurements.
- To develop an integrated approach combining multiple data sources for precise depth mapping.
Main Methods:
- Utilized Landsat Thematic Mapper imagery for lake boundary extraction.
- Incorporated Ice, Cloud, and Land Elevation Satellite's Geoscience Laser Altimeter System (ICESat/GLAS) data for topographic information.
- Integrated hydrological station water level data for bathymetric interpolation.
Main Results:
- Successfully derived lake boundaries using advanced image processing techniques.
- Generated lake topography by correcting and interpolating ICESat/GLAS data.
- Achieved accurate lake bathymetry (±1 m) through interpolation of water level data.
Conclusions:
- The integrated approach significantly improves lake bathymetry accuracy.
- This method offers a more efficient and precise alternative to traditional bathymetric surveys.
- Accurate bathymetry data supports crucial lake management and environmental protection efforts.
Keywords:
ICESat/GLAS datalake bathymetryoptical remote sensingsounding techniquewater level inversionMore Related Videos
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