The added value is the profit out of a production process. It is calculated by the output, economically and socially, minus the input, e.g. material, work and costs of capital. To use scarce resources in the economic and social most efficient way the added value has to be maximized. For water use it means to gain as much as possible from the input water.
Possible measures to increase the added value for water savings are:
- Reduce water losses during transport and delivery together with energy savings, e.g. by detecting leakages and illegal off-takes
- Build up specialised knowledge and financial means to implement efficient water use, e.g. in agriculture the allocation of water to plants at the right time and amount
- Develop political instruments to create incentives for water savings, like water pricing
- Foster the paradigm shift to demand-oriented management instead of supply-driven management to improve efficient water allocation
- Reuse of irrigation and waste water, not only to save costly treated water, but also to save fertilizer by getting embodied nutrients
- Reduced nutrient loads from agriculture by accurate fertilisation reduce treatment costs of wastewater
GIZ (2010): Water-Saving Irrigation. Briefing Note.
GIZ (2011): Water-Saving Measures to Adapt to Impacts of Climate Change in Bolivia.