The plan was developed to assist the
American Samoa Environmental Protection Agency (ASEPA) with the
implementation of earlier recommendations presented in its
regional Watershed Protection Plan. The plan was primarily to
evaluate potential opportunities and develop conceptual site
- stormwater detention that
could help improve nearshore water quality; and,
- conservation of fish,
wildlife, and unique vegetation.
Pedersen Planning Consultants (PPC)
initially performed field surveys of approximately 10 wetlands
and five riparian areas that were selected by ASEPA. These
surveys delineated wetland boundaries, documented existing fish,
wildlife, and vegetative resources, and located long-term
resource monitoring stations. The survey used a combination of
global positioning system (GPS) and geographical information
system (GIS) technologies to integrate update digital files and
establish new databases for long-term resource management.
Potential stormwater detention opportunities were documented.
Specific opportunities for the conservation of fish, wildlife,
and unique vegetation were also identified. A digital photo
library was established for all sites to facilitate long-term
comparisons of wetland and riparian conditions.
Potential stormwater detention
opportunities were further evaluated through the modeling of
2,10,50, and 100-year storm events. Conceptual site plans were
prepared which depicted proposed improvements for achieving
greater stormwater detention in selected wetlands.
Similarly, conceptual site plans
also outlined recommended conservation sites. These
conservation sites included opportunities for the replanting of
vegetation that would foster improved stream hydrology and/or
increase fish and wildlife habitat. Other conservation
proposals included potential recreational opportunities that
would promote increased public education and appreciation for
wetland and riparian areas. The preservation of selected sites
was also given consideration where unique vegetative, fish and
wildlife resources were identified.