This report from earlier in 2020 is relevant to the latest issue of TR News (#328, on stormwater management).
The infiltration approach to stormwater management involves the design, construction, and operation of engineered systems that infiltrate stormwater runoff into soils. These systems, referred to as “infiltration best management practices (BMPs),” are intended to reduce the volume of stormwater runoff and associated pollutants that discharge to stormwater systems and receiving waters via surface runoff.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 922: Stormwater Infiltration in the Highway Environment: Guidance Manual supports evaluation, selection, siting, design, and construction of infiltration BMPs in the highway environment. It is also intended to identify limitations on the use of infiltration and determine the need for alternative non-infiltration-based stormwater management approaches.
Additional resources for the guide include:
Table of Contents
|Chapter 1 - Introduction and Orientation||1-14|
|Chapter 2 - Planning Framework for Early Decision-Making and Tentative BMP Selection||15-60|
|Chapter 3 - Confirmation of BMP Selection Through Prioritized Analyses and Investigations||61-78|
|Chapter 4 - Key Considerations for Design, Construction, and Maintenance of Infiltration BMPs||79-98|
|Chapter 5 - BMP Selection and Sizing Case Studies||99-109|
|Glossary of Key Terms||111-118|
|Appendix A - Infiltration BMP Fact Sheets||120-209|
|Appendices B through J||210-214|
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