Both stormwater control and stream restoration are proven ways to reduce erosion along water channels.
Often, though, each method is managed by a different urban land-management department, measuring different success values. Efforts are rarely coordinated due to funding and other constraints.
Rod Lammers and his colleagues at the University of Georgia looked at some computerized models to see if coordinating these land management practices with common goals might have a greater positive impact on erosion. The good news? It does.
First, let’s take a look at why stormwater management systems are necessary. In nature, precipitation falls onto forests, prairies and other soil-based areas. The water is soaked into the soil, down into the water table, and out into water bodies. Eventually, through evaporation, that water gets back into the atmosphere – until the next precipitation event.
In cities, though, pavement, rooftops, and other structures break the water cycle. City managers and engineers develop stormwater management systems to collect and move water in long tunnels, under buildings, and out to waterways. The more impermeable structures and the larger the area, the more complex the system must be.
Continue reading at American Society of Agronomy
Image via Rod Lammers, University of Georgia