Watershed Approach to Mitigating Hydrologic Impacts of Transportation Projects: Guide (2022) / Chapter Skim
Currently Skimming:
Pages 72-82
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 72... ...
72 Site-specific ecological and socioeconomic factors contribute to the provision and value of ecosystem services, respectively. This appendix summarizes common factors for co-benefits related to wetland restoration and creation (Table C.1)
|
From page 73... ...
Site-Specific Factors Related to Co-Benefits 73 Climate stabilization • Newly created freshwater wetlands may serve as a net source of carbon due to methane emissions, or a net benefit by reducing carbon emissions by restoring disturbed or degraded wetlands • Newly created and restored saltwater wetlands can provide a net carbon benefit (reduced carbon emissions) • Carbon sequestration potential of wetland and timeframe anticipated (available biomass, soil carbon, standing dead carbon)
|
From page 74... ...
74 Watershed Approach to Mitigating Hydrologic Impacts of Transportation Projects: Guide Table C.2. Site-specific factors for forest restoration and creation mitigation.
|
From page 75... ...
Site-Specific Factors Related to Co-Benefits 75 Co-benefit Site-specific ecological factors that contribute to the provision of ecosystem services Site-specific socioeconomic factors that contribute to the value of ecosystem services Timber and forest product harvest benefits (resource harvesting) • Specific mix of tree species • Connectivity of forest to larger forested tracts • Potential for targeted resources to grow/live in forest • Some resource harvesting benefits associated with more mature forests may be long-term benefits that increase as the forest matures but may not be substantial in the short-term • Potential for resource harvesting (i.e., hunting)
|
From page 76... ...
76 Watershed Approach to Mitigating Hydrologic Impacts of Transportation Projects: Guide Co-benefit Site-specific ecological factors that contribute to the provision of ecosystem services Site-specific socioeconomic factors that contribute to the value of ecosystem services Improved drinking water quality • Baseline water quality: existing upstream or downstream water quality impairments (where water quality is already high, further improvements may be less likely or less valuable) • Extent of streambank stabilization and erosion prevention elements of the mitigation (e.g., nature and extent of riparian planting)
|
From page 77... ...
Site-Specific Factors Related to Co-Benefits 77 Co-benefit Site-specific ecological factors that contribute to the provision of ecosystem services Site-specific socioeconomic factors that contribute to the value of ecosystem services Water supply maintenance • Ability of landscape to transport clean water toward drinking water catchments or promote infiltration relative to prerestoration land cover • Ability of landscape to enhance base flow and aquifer recharge • Designated use of hydrologically connected water bodies (e.g., connection to existing or potential drinking water sources or irrigation water sources) • Availability of substitute water sources (value is increased where substitutes are scarce)
|
From page 78... ...
78 Watershed Approach to Mitigating Hydrologic Impacts of Transportation Projects: Guide Table C.4. (Continued)
|
From page 79... ...
Site-Specific Factors Related to Co-Benefits 79 Co-benefit Site-specific ecological factors that contribute to the provision of ecosystem services Site-specific socioeconomic factors that contribute to the value of ecosystem services Water supply maintenance • Potential of modified agricultural practices to reduce demand for external sources of irrigation (e.g., diverted flows, groundwater, etc.) • Potential of modified agricultural practices to result in reduced overland flows, increased infiltration of precipitation, and more consistent flows of water for drinking water purposes • Designated use of hydrologically connected water bodies (e.g., connection to existing or potential drinking water sources)
|
From page 81... ...
Abbreviations and acronyms used without denitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America's Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration GHSA Governors Highway Safety Association HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012)
|
From page 82... ...
ISBN 978-0-309-68731-7 9 7 8 0 3 0 9 6 8 7 3 1 7 9 0 0 0 0 Transportation Research Board 500 Fifth Street, NW Washington, DC 20001 ADDRESS SERVICE REQUESTED
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.