New Hampshire Estuaries
Stormwater Management
Category: Wetland and Upland
Cost: $18,000 NHEP; $18,000 Portsmouth
Description: Various stormwater management techniques are used: sediment
basin, grass strip, shallow water wetland and wet pond (deep basin) construction,
wildlife openings, turf grass perimeter, outflow riprap, vegetation control, fencing,
bird boxes, silt fencing. Pre- and post-monitoring is conducted, including aerial
photos.
Outcome: Hydrologic and biological functions improved. Dissolved oxygen
readings are favorable, submerged aquatic vegetation is thriving, water absorption
has increased, no flooding of adjacent properties have been recorded, sediment
load is lower, and native plants are replacing invasives.
Contact: Steve Parkinson, City of Portsmouth
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