New Catalyst Project website: ARIGA

ARIGA is the Assessing Risk of Investment in Groundwater Resources in Sub-Saharan Africa project being led by the World Forestry Centre in Kenya/ICRAF:

This project aims to find a more holistic way of assessing risks around the development of groundwater resources. The Wajir pipeline project was taken as a case study to measure the value of taking such an approach.

You can now find out more about the project and what is emerging from the research on their dedicated website:

Fluoridation vs. fluorosis: two faces of the same medal

reposted with permission from

Posted by Sara Datturi
June 30, 2014

Fluorine (F2 of F) is the element  # 9 in the Periodic Table. Due to its high reactivity, it is not found freely in nature, but it often combines with other elements. For instance, F represents 0.064% of the earth crust’s mass.  In nature, F is common found as fluoride anion in several minerals particularly in fluorite. 

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Africa Groundwater Literature Archive – beta version now online


This archive of groundwater literature for Africa is being developed as part of the Africa Groundwater Atlas project, through the Unlocking the Potential for Groundwater for the Poor (UPGro) research programme.

The Africa Groundwater Atlas project will make available

  • an archive of groundwater literature related to Africa, searchable by country and keywords
  • a web-based atlas summarising the hydrogeology of each African country in maps and text
  • a printed atlas of the hydrogeology of Africa

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One Bridge, Multiple Functions

re-blogged from: thewaterblog

Posted by Rossella Alba
May 22, 2014

In Megab, a rather small village in the semi-arid Tigray region in northern Ethiopia, one bridge provides multiple functions to the local community. The bridge is located along the road that connects Hawzien to Abreha-we-Atzeha and Wukro. At first sight, it appears to be just a bridge. But when you look carefully,  you can see it combines multiple functions: access, connection and water harvesting 

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New Paper – Roads for water: the unused potential


A new paper by Diego Garcia-Landarte Puertas, Kifle Woldearegay, Lyla Mehta, Martin Van Beusekom, Marta Agujetas Peréz and Frank Van Steenbergen from the Catalyst Project: Optimising Road Development for Groundwater Recharge and Retention

Download the open access Waterlines paper from Practical Action.


“Roads are generally perceived as infrastructure to deliver transport services, but they are more than that. They are major interventions in the hydrology of areas where they are constructed – concentrating runoff and altering subsurface flows. At present, water-related damage constitutes a major cost factor in road maintenance. Using ongoing research from Ethiopia, this article argues to reverse this and turn water from a foe into a friend and integrate water harvesting with road development.

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