concept design san antonio river improvements project

APPENDIX
• Glossary of Fluvial Geomorphologic & Other Relevant Terms
• Economic and Market Overview
• Recommended Plant List for Restoration of Riparian Corridors
• Plant List for Use on the San Antonio River
• A Brief Study of Archaeologically Sensitive Areas
• HEC-RAS Model
• Hike and Bike Pathways
• Fluvial Geomorphology Design Criteria
• Master Cost Analysis and Gant Chart
• Naming and Dedication Rights
• Summary of Community Participation
• Brooklyn Avenue Dam
• Operations and Maintenance Requirements
106 SAN ANTONIO RIVER DESIGN GUIDELINES
Recommended Plant List for Restoration of Riparian Corridors
on the San Antonio River
prepared by PBS&J
Recommendations for planting incorporate the native species that already thrive at or near the
site because their presence in that location confirms their suitability to the local physical
environment. Additional plant species were included in the list because they are native to the
region and have physiological requirements similar to the resident species. Bexar County
includes three of the ten vegetational areas in Texas: Edwards Plateau, Blackland Prairie and
South Texas Plains, so a diversity of species are native and appropriate for the area. The sitespecific
plant communities were described in a previous document, the Technical
Memorandum on Baseline Habitat Conditions and Recommendations for Increasing Habitat
Value along the San Antonio River, San Antonio, Texas.
Although Chinese tallow (Sapium sebiferum), Chinaberry (Melia azedarach), Japanese
ligustrum (Ligustrum sp.) and privet (Ligustrum sinense) thrive in the project area, they are
introduced species. Tallow and privet are nuisance species and should be eradicated where
possible because they, especially tallow, commonly displace native species.
As was also stated in the previous document, the preservation and/or planting of native mast,
seed and fruit producing species (e.g., oaks, pecan, walnut) will encourage wildlife to forage
within these areas. In addition, the planting of native understory species (i.e., small trees and
shrubs) will provide stratification, which is an important element in a healthy and diverse
community. This stratification will attract species that would otherwise not utilize the area if
only overstory canopy species were present.
The following table includes a general list of plants species that are suitable for the restoration
of riparian habitats within the project area, habit (tree, shrub, herbaceous), canopy level
information (overstory, understory, groundcover, or aquatic), and additional notes about
habitat requirements. These species are generally available throughout Central and South
Texas nurseries and seed companies. The Lady Bird Johnson Wildflower Center, Austin, Texas,
provides extensive regional lists of local sources (with contact information) for native plants
and seeds. Many species will naturally recruit and are generally not available through nurseries.
For that reason, they are not on this list. They include mesquite (Prosopis glandulosa), retama
(Parkinsonia aculeata), huisache (Acacia smallii), hackberry (Celtis laevigata), and black willow
(Salix nigra). Also, sedges, rushes and other species typical of depressional and fringing
(streamside) wetlands were not included in the list because they generally are not available
through nurseries and will naturally colonize sites with the appropriate hydrogeomorphic
characteristics (i.e., shallow water with low flow regime). If broad, shallow, streamside areas
are created these wetland species will volunteer. They will not be recruited to areas with steep
slopes where water depths exceed their tolerance.
Recommendations for planting in this area