Thermal Imagery-Derived Surface Inundation Modeling to Assess Flood Risk in a Flood-Pulsed Savannah Watershed in Botswana and Namibia
Abstract
:1. Introduction
- (1)
- Can thermal imagery be utilized successfully to determine the seasonal and inter-annual patterns of inundation in the Chobe River Basin and how have they changed over the past 15 years?
- (2)
- What are the driving forces that control the magnitude of flooding of the Chobe River, do different variables have more of an impact on the flooding magnitude than others and how do these variables differ between years that experience average flooding and years with unusual (high or low) flooding magnitude?
- (3)
- Where in the Chobe River basin are large populations of people most susceptible to high magnitude floods?
2. Materials and Methods
2.1. Study Area
2.2. Materials
2.2.1. Thermal Imagery (Land Surface Temperature)
2.2.2. Discharge and Stage Data
2.2.3. Precipitation
2.2.4. Population and Ancillary Data
2.3. Methods
2.3.1. MODIS Pre-Processing and Image Differencing
2.3.2. Image Threshold Segmentation
2.3.3. Inundation Mapping Validation
2.3.4. Regression Analysis of Flood, Discharge and Precipitation Patterns
2.3.5. At-Risk Population Analysis
3. Results
3.1. Regional Inundation Duration
3.2. Inundation Duration 2000–2014
3.3. Typical Seasonal Inundation Dynamics
3.4. Regression Analysis of Flood and Precipitation Patterns
Chobe River Basin Statistics
3.5. Population-Flood Risk Mapping
4. Discussion
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Burke, J.J.; Pricope, N.G.; Blum, J. Thermal Imagery-Derived Surface Inundation Modeling to Assess Flood Risk in a Flood-Pulsed Savannah Watershed in Botswana and Namibia. Remote Sens. 2016, 8, 676. https://doi.org/10.3390/rs8080676
Burke JJ, Pricope NG, Blum J. Thermal Imagery-Derived Surface Inundation Modeling to Assess Flood Risk in a Flood-Pulsed Savannah Watershed in Botswana and Namibia. Remote Sensing. 2016; 8(8):676. https://doi.org/10.3390/rs8080676
Chicago/Turabian StyleBurke, Jeri J., Narcisa G. Pricope, and James Blum. 2016. "Thermal Imagery-Derived Surface Inundation Modeling to Assess Flood Risk in a Flood-Pulsed Savannah Watershed in Botswana and Namibia" Remote Sensing 8, no. 8: 676. https://doi.org/10.3390/rs8080676