Traditionally costs for irrigation services are based on the concept to cover the infrastucture maintenance and personel involved (including overheads) and a fee based on different unit (per surface, per crop, per cubic meter,....), that could be quantified with classical economics tools. Novel policies (i.e the Article 9 of the EU Water Framework Directive (WFD) introduce the concept of the full cost recovery that internalizes environmental (positive and negative) and resource costs (ERC), which are not easy to quantify.
Pasquale
this is a very good question, considering the fact that the environmental impact is both positive and negative, both on the long term (lifecycle) and in the short term (seasonal).
I am sure you must have seen the report from the World Bank Cost Recovery and Water Pricing for Irrigation and Drainage Projects
http://siteresources.worldbank.org/INTARD/Resources/Cost_Recovery_final.pdf
It also studies cost recovery within the limits of having the ability to pay.
the case studies in the Annexures may help with your question.
thank you
FC
well Princsloo is right. The other way of looking at it is to also relate it to a control. For instance, farm gross revenue without and with irrigation. then Profits comparison will give you some evidence of full cost recovery. I did similar studies in Ghana and the title is: Impact of small scale irrigation technologies on poverty alleviation among peri-urban and urban farmers. You may check it out to see if it can contribute to what you seek.
Regards
Banson
Dear FC and Kwamina, many thanks for the material provided, I will read it carefully and let you know
regards
Pasquale
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