Green infrastructure: a solution to storm water management and urban resilience?
The urban landscape as it currently exists cannot optimally manage the effects of heavy rain and storms. The abundance of impervious surfaces in urban areas affects the local hydrology, reducing infiltration and groundwater recharge, and increasing dirtied runoff into surrounding bodies of water. In many cities, particularly in the U.S. Northeast, antiquated combined sewer systems collect all household and industrial wastewater and storm water in one pipe, funneling it all to a treatment facility. However, during severe rain events, high volumes of water inevitably overwhelm the system, creating a serious health hazard when the sewers overflow into public waterways. The changing climate will only exacerbate existing problems: climate reports predict that rainfall will only get heavier in New England. In addition, the American Society of Civil Engineers (ASCE) has given the infrastructure of the United States a grade of “D+”. While it is a dismal rating, there are creative ways to simultaneously improve both infrastructure and urban resilience.