The following is an excerpt from City Parks, Clean Water, a report by the Trust for Public Land’s Center for City Park Excellence that examines the role of urban parks in managing stormwater. This is the twelfth installment in a series of 19 posts.
In all considerations of urban stormwater management, space is a factor. A prime difficulty with liberating a stream from a fortified channel is that it then requires a wider footprint – but over the years that historic floodplain has usually been covered with housing, shops or industry. Mountains Recreation and Conservation Authority Landscape Architect Brian Baldauf has calculated that the present 50- to 100-foot-wide riparian corridor of the Los Angeles River and its tributaries (including Tujunga Wash) would need to be five to seven times wider to be naturally resilient against flooding. The problem is more severe in arid regions with their wider fluctuations between droughts and deluges, but the challenge reaches from coast to coast. In the Charlotte, North Carolina area, which has seen rapid recent development (including a widespread increase in new pavement) and higher water levels, Mecklenburg County has an aggressive program to buy out willing sellers in the flood zone, remove built structures, and turn the land into open space (often resulting in the construction of a natural greenway to be maintained by the parks department). Austin and El Paso similarly have created broad swaths of parkland from former residential neighborhoods decimated by floods.
Filed under: facilities, green infrastructure, maintenance/management, partnerships, planning | Tagged: Canal Park, Center for City Park Excellence, City Parks Clean Water, green infrastructure, rain gardens, stormwater, stormwater management, Trust for Public Land, urban parks | Leave a comment »