A new study by the U.S. Environmental Protection Agency focuses on areas of the United States where groundwater is a significant contributor to urban and agricultural uses, and where water shortages may occur in the future under different climate change scenarios.
The study was commissioned to estimate groundwater recharge benefits from applying small stormwater retention practices on new development and redevelopment nationwide.
The results suggest applying green infrastructure practices to new development and redevelopment can save hundreds of millions of dollars in groundwater resources. If retrofitting or increased retention were to occur, the groundwater benefits would be even more significant.
Broad assumptions, national datasets, and simplified recharge calculation and monetization approaches were used to provide general insight into the monetary benefits of small stormwater retention practices. The assumptions and limitations are listed in the study to facilitate the efforts of future researchers.