Watershed Approach to Mitigating Hydrologic Impacts of Transportation Projects: Conduct of Research Report (2022) / Chapter Skim
Currently Skimming:
Pages 17-25
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 17... ...
17 Chapter 3. Decision Framework for the Watershed Approach This chapter introduces a decision framework that summarizes the typical steps and decision points for a State DOT to apply a watershed approach for mitigating hydrologic impacts of transportation infrastructure.
|
From page 18... ...
18 Step 1: Identify project(s) for evaluation.
|
From page 19... ...
19 to evaluate off-site mitigation techniques using a watershed approach and continue with step 6 to investigate whether off-site mitigation offers advantages over on-site mitigation. The evaluation, using cost-benefit analysis or another approach, may provide insights to the State DOT and external partners and stakeholders whether using off-site mitigation techniques can meet or exceed minimum requirements or capture co-benefits available with off-site mitigation, but not with on-site mitigation.
|
From page 20... ...
20 the parties recognize that the benefits of proceeding with a watershed approach are better than the status quo even though the portfolio does not strictly achieve all objectives. If NO, the State DOT considers whether to continue with the watershed approach.
|
From page 21... ...
21 3.2. Mitigation Techniques within the Watershed This research project focused on mitigation techniques applied off-site rather than traditional onsite/in-kind mitigation based on the literature review.
|
From page 22... ...
22 considered a tool to mitigate hydrologic impacts elsewhere in a watershed. As with wetland restoration and creation, the choice of forest vegetation and the needed hydrology are essential to establish and maintain forest functions.
|
From page 23... ...
23 drainage including "gray" infrastructure such as paved ditches, inlets, storm drains, detention facilities, etc. Changes may also be achieved through "green" infrastructure such as green roofs, bioretention, infiltration trenches, grassed swales, etc.
|
From page 24... ...
24 is beyond the scope of this research to address the myriad requirements that may be applicable to a given transportation project or mitigation technique. However, the following considerations are relevant to the selection of a given mitigation technique: • Legal and regulatory barriers to implementation.
|
From page 25... ...
25 • Nongovernmental conservation organizations. NGOs, particularly land conservation organizations, are important potential partners.
|
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.