**7. Supporting urban aquifers via inter- sectoral water transfers**

Researchers are studying the business of rural–urban water transfers and aquifer recharge with wastewater to address the significant challenges that urbanization poses to aquifers and their management. In Bangalore, India, groundwater recharge is done by directing the urban wastewater into reservoir called peri-urban tank. The revitalization reservior had been dry for more than 18 years, now it is making groundwater accessible to peri-urban and urban users once again. The Llobregat delta near Barcelona in Spain and the Mashhad plain in Iraq follows the same trend, where the freshwater is exchanged with treated wastewater by farmers and city people, while wastewater also replenishes the city's aquifer. Researchers are investigating various models to increases the efficiency in exchanging the freshwater with treated water.
