01752528

Component

http://www.trb.org/Main/Blurbs/181815.aspx

This article summarizes new tools developed via the National Cooperative Highway Research Program (NCHRP) that can assist stormwater practitioners in evaluating infiltration best management practices (BMPs) for highway infrastructure projects. Highlighted are special considerations for utilizing infiltration BMPs in karst landscapes characterized by caves, sinkholes, swallets (i.e., stream-to-sinkhole features), underground streams, and springs. NCHRP Report 802: Volume Reduction of Highway Runoff in Urban Areas—Guidance Manual provides an overview of issues in infiltration as well as its benefits. The accompanying volume performance tool is an Excel-based application that calculates planning-level estimates of long-term volume reduction—including the amount of runoff that is infiltrated, evapo-transpired (i.e., surface- or soil-evaporated or transpired via plants), and discharged to surface conveyances—from user-provided location and planning-level project information. NCHRP Research Report 922: Stormwater Infiltration in the Highway Environment—Guidance Manual provides more-detailed guidance that is based on a decision-making framework oriented around the phases of the project design and delivery process. This framework is intended to help state departments of transportation make early and efficient decisions about the use of infiltration, including identifying favorable, marginal, and clearly unsuitable sites.

English

pp 30-35

2020-7

TR News

Digital/other

Figures; Photos; References

Best practices; Decision making; Guidelines; Highways; Infiltration; Karst; Runoff; Urban areas; Water quality management

National Cooperative Highway Research Program

Environment; Highways; Hydraulics and Hydrology

TRIS, TRB, ATRI

Sep 15 2020 10:48PM

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