NCHRP 25-25(85). Nutrient (Nitrogen/ Phosphorus) Management and Source Control. Project Overview. Goals and Objectives: Identify and critically evaluate DOT strategies for assessing nutrient concerns and reducing nutrient loads from highway runoff Document Organization: Introduction
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Nutrient (Nitrogen/ Phosphorus) Management and Source Control
Goals and Objectives:
Nutrient Regulations and Trends
Nutrients in the Environment
Sewage Treatment Plant Discharge
Source: Paerlet al. (2006)
Source: Nutrient Innovations Task Group (NITG, 2009)
Source: CDOT (2013)
Source: Driscoll et al. (1990).
Nutrient Removal Processes
BMP Types and Performance
PFC layer on Loop 360, Austin, Texas
Source: Bradley J. Eck.
Baffle BoxSource: Caltrans (2003)
Statistical significance of nutrient concentration reductions from BMP data contained in theInternational Stormwater BMP Database (Version 03 24 2013)
Note: Solids grey circles indicate statistically significant increase
Strategies and Designs for Nutrient Control
Source: WSDOT (2014)
Summary and Recommendations