Use of ICESat-2 ground and water level elevation data towards establishing a seasonal and flash flood early warning system in the lower Ganges-Brahmaputra-Meghna River Basin.
Water resource management; observation of freshwater storage change
The Ganges-Brahmaputra-Meghna (GBM) river basin covering India, Nepal, China, Bhutan, and Bangladesh is prone to massive flooding events due to transboundary monsoonal rainfall and a synergy with alpine glacier/snow melt. How to manage water resources has become a critical issue at this densely populated region, where the complication includes a decrease in groundwater storage, excessive surface water in rainy season, arsenic contamination in freshwater, and saltwater intrusion at coastal region. From the socio-economic perspective, a timely observation of freshwater storage change is imperative for local end-users to build mitigation and adaptation processes in response to natural hazards. Hence, our aim in this project is to use ICESat-2 ground and water elevation data as the major input for our observation network providing a near real-time monitoring of seasonal and flash floods, towards establishing an early-warning system for people living in the lower GBM delta. The capability of ICESat-2 water elevation data (ATL13) detecting narrow tributaries far upstream will outperform current radar altimeter approach and will be utilized to our model prediction of river discharge and water storage change. Our international science team, consisting of geodesists, hydrologists, and remote sensing scientists including local end-users and stakeholders, will leverage upon ongoing social and environmental projects in this region.
- Faisal Hossain, University of Washington, Dept. of Civil & Environmental Engineering; Responsible for providing hydrologic model simulation using ICESat-2 data and validation with in situ data
- Stéphane Calmant, Insititut de recherche pour le developpment (IRD), LEGOS, France; Responsible for validating ATL13 at Bangladesh (or other test regions) river network and will work on calibration of ATL13 with other radar altimetry data products and hydrological models.
- C.K. Shum, Ohio State University; Provide advice on pre-launch data processing using MABEL and MATLAS relevant to the GBM and Bangladesh watersheds, and post-launch data validation.
- Institute of Water Modelling (POC: Zahirul Haque Khan)
- Bangladesh Water Development Board (POC: Engr. Zahirul Islam)
- Bangladesh Inland Water Transport Authority (POC: Md. Mahbub Alam)