UNESCO/IHE - Water value maps

UNESCO/IHE - Water value maps

Based on a detailed land use map, information on actual evapotranspiration and biomass production, and an innovative hydrological model, it is possible to develop water value maps of river basins, distinguishing economic, ecological and livelihood values. The amount of water that transpires and produces biomass are measures for either the economic value of a commercial crop (if the land use is agriculture), or the increase in value of ecosystem goods and services (if the land use is natural). Information on the origin of the water consumed, either directly from rainfall, or from groundwater, rivers and lakes, adds valuable information on the opportunity cost. Such a map is useful for planning and decision-making in river basins.

Contact: Pieter van der Zaag (p.vanderzaag@unesco-ihe.org)

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