WaPOR, remote sensing for water productivity

Methodology

The Water Accounting Plus (WA+) framework was developed by IHE Delft and its partners, FAO and IWMI, to fill in demand of deriving information from open-access public-domain datasets to account for water consumption, flows, fluxes and storages by land and water use class and quantifying green and blue evapotranspiration per land use type. The approach makes a distinction between beneficial and non-beneficial, and consumptive and non-consumptive uses of water. The framework also calculates global indicators such as the water use efficiency and water productivity. WA+ is meant to support decision makers in the long-term planning of land and water management using Open Access Remote Sensing data. Open-source tools in Python programming to automate the collection of open-access remote sensing data and computation of WA+ sheets has been developed and distributed here.

In addition, a Rapid Water Accounting essentially based on WaPOR data (WAPORWA) was developed and applied in 4 river basins: Jordan, Awash, Niger and Nile. WAPORWA provides a rapid computation of the first WA+ sheet (Sheet 1 Resource Base) from the available WAPOR database. The WA+ Sheet 1 shows the water balance of the entire river basin and accounts for inflow, outflow, consumption and non-consumed outflow. Moreover, a number of key performance indicators (Basin ET fraction, stationarity index, basin closure, managed water fraction) can be derived from WA+ Sheet 1 to help the basin planners to understand the key information on water management in the basin. The WAPORWA tool is open-source and can be found here.