Abstract
Pakistan is reported to be one of the top ten, most water stressed, countries in the world. In this research, the potential to use renewable energy-based seawater desalination and improved irrigation systems to overcome the water stress in Pakistan is evaluated. It was observed that increasing the country's overall irrigation efficiency to 90% by 2050, results in a 54% and 80% reduction in total water and desalination demand, respective to a business as usual scenario. In a moderate scenario, where the maximum increase in irrigation efficiency is 1% per year, the 2050 total water and desalination demand are reduced by 21% and 40% respectively. The projected desalination demand growth, across the three scenarios, can be powered solely by renewables by 2050, at an average cost of water production of 0.6 €/m3. This includes the cost of water transportation in Pakistan and is reported to be an attractive water cost for farmers. Solar photovoltaics and battery storage drive the low cost electricity generation production in Pakistan. Thus, the results show how Pakistan can use improved irrigation efficiency systems and the low cost renewable electricity to achieve water security for the country.
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