Water problems around the world are increasing; however, information useful for decision makers within the water sector and related to the water sector seems to be decreasing. Solving water problems requires information from many disciplines, and the physical accounts (describing sources and uses of water) are the most important foundation. The information has to be coherent and harmonized in order to provide an integrated picture useful for the assessment of the problems. The current hydrological data democracy does not provide all required data necessary for a proper water consumer communication, which hampers the development of good water stewardship.


Water accounting integrates hydrological processes with land use, managed water flows and the services that result from water consumption in river basins. Its objective is to strive to achieve equitable and transparent water governance for all water users and a sustainable water balance. Users can provide value assessments of certain process, and more accurate data sets, that replaces the default data collected from open access sources that represent “best estimates”. Water accounting has been developed originally by Dr. David Molden from the International Water Management Institute (IWMI) and has been modified and upgraded with inputs from the Delft University of Technology.


The current website provides the framework and results of a new Water Accounting methodology that is based on global scale public domain datasets (WA ). It is a multi-institutional effort from international knowledge centers (IWMI, UNESCO-IHE and FAO) that are neither politically or geographically connected to a given river basin. WA provides independent estimates of water flows, fluxes, stocks, consumption and services, that in the near-future becomes certified. More information on the international knowledge centers can be found here.

WLE and IWMI International Water Management Institute

UNESCO-IHE Institute for water education          FAO Food and agriculture organization






Water accounting

Water accounting is the process of communicating water resources related information and the services generated from consumptive use in a geographical domain, such as a river basin, a country or a land use class, to users such as policy makers, water authorities, managers, etc.


Water Accountingaccounting sheets