9:00–10:00 a.m. CET / 4:00–5:00 p.m. Manila

Planning of water resources development and allocation requires temporal and spatial information on water availability and consumption at the natural scale. Following the first webinar on water productivity, the ADB Water Sector Group, IHE Delft Institute for Water Education (IHE Delft), and the International Water Management Institute (IWMI) held a webinar on use of remote sensing for water accounting. This provides quantitative information and maps on major storages, flows, and fluxes of water resources within a river basin. This information is critical to ensure all major water demands can be sustainably met, including for environmental, domestic, agricultural and energy purposes.

The webinar introduced the concept of water accounting and the Water Accounting Plus (WA+) methodology, and provided examples on how water accounting can be used in decision-making, noting different ADB case studies part of the two phases of water accounting work done since 2017. Lastly, a vision for the future of remote sensing-based water accounting was presented.

(Part 2 of the Expanding Support to Water Accounting in River Basins and Water Productivity Measurement in Irrigation Projects)