Green Water Credits can be seen as an investment mechanism for upstream farmers to practice soil and water management activities that generate benefits for downstream water users, which are currently unrecognized and unrewarded. FutureWater coordinated and carried out the biophysical assessment that quantified the impact of Green Water Credits practices on the green and blue water and sediment fluxes in the Upper Tana basin. The analysis lead to identification of potential target areas for GWC pilot operation on biophysical grounds.

Green Water Credits can be seen as an investment mechanism for upstream farmers to practice soil and water management activities that generate benefits for downstream water users, which are currently unrecognized and unrewarded. This initiative is driven by economic, environmental and social benefits. The implementation of GWC has the potential of enhancing overall water management by reducing damaging runoff, increase groundwater recharge, simulate a more reliable flow regime, and reduce harmful sedimentation of reservoirs.

Green Water Credits: the concept.

FutureWater coordinated and carried out the biophysical assessment that quantifies the impact of Green Water Credits practices on the green and blue water and sediment fluxes in the Upper Tana basin. The analysis leads to identification of potential target areas for GWC pilot operation on biophysical grounds. This required a distributed modeling approach (SWAT) accounting for the heterogeneities in the basin in terms of precipitation regime, topography, soil characteristics and land use. The developed tool quantifies the benefits of the management practices on erosion reduction and green and blue water flows in the basin.

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Related publications

  • 2019 - Ecosystem ServicesWillemen, L., N.D. Crossman, D. Newsom, D. Hughell, J.E. Hunink, J.C. Milder. 2019. Aggregate effects on ecosystem services from certification of tea farming in the Upper Tana River basin, Kenya. Ecosystem Services (38). https://doi.org/10.1016/j.ecoser.2019.100962X

    Aggregate effects on ecosystem services from certification of tea farming in the Upper Tana River basin, Kenya

    Willemen, L., N.D. Crossman, D. Newsom, D. Hughell, J.E. Hunink, J.C. Milder

  • 2012 - Journal of Environmental ManagementHunink, J.E., P. Droogers, S. Kauffman, B.M. Mwaniki, J. Bouma. 2012. Quantitative simulation tools to analyze up- and downstream interactions of soil and water conservation measures: Supporting policy making in the Green Water Credits program of Kenya. Journal of Environmental Management 111: 187-194X

    Quantitative simulation tools to analyze up- and downstream interactions of soil and water conservation measures: Supporting policy making in the Green Water Credits program of Kenya

    Hunink, J.E., P. Droogers, S. Kauffman, B.M. Mwaniki, J. Bouma

  • 2009 - FutureWater Report 84Hunink, J.E., W.W. Immerzeel, P. Droogers. 2009. Green Water Credits for the Upper Tana Basin, Kenya. Phase II - Pilot Operations: Biophysical assessment using SWAT. FutureWater Report 84X

    Green Water Credits for the Upper Tana Basin, Kenya. Phase II – Pilot Operations: Biophysical assessment using SWAT

    Hunink, J.E., W.W. Immerzeel, P. Droogers

  • 2006 - FutureWater Report 54Droogers, P., J.H. Kauffman, W.W. Immerzeel. 2006. Green and blue water services in Tana river basin, Kenya, exploring options using an intergrated modeling framework. Green Water Credits Report 3. FutureWater Report 54X

    Green and blue water services in Tana river basin, Kenya, exploring options using an intergrated modeling framework

    Droogers, P., J.H. Kauffman, W.W. Immerzeel

  • 2006 - ISRIC report 2006/04Droogers, P., J.H. Kauffman, J.A. Dijkshoorn, W.W. Immerzeel, J.R.M. Huting. 2006. Green Water Credits: Basin identification. Green Water Credits report 1. ISRIC report 2006/04. ISRIC, WageningenX

    Green Water Credits: Basin identification

    Droogers, P., J.H. Kauffman, J.A. Dijkshoorn, W.W. Immerzeel, J.R.M. Huting

  • 2006 - FutureWater Report 53Droogers, P., S. Mantel, J.H. Kauffman. 2006. River basin models to support Green Water Credit Assessment. FutureWater Report 53X

    River basin models to support Green Water Credit Assessment

    Droogers, P., S. Mantel, J.H. Kauffman