00218167

Component

http://onlinepubs.trb.org...s/hrr/1967/161/161-012.pdf

INCREASING TRAFFIC AND PUBLIC DEMAND FOR ICE-FREE ROADS HAS LED TO INCREASED EMPLOYMENT OF ROCK SALT AND CALCIUM CHLORIDE FOR EFFICIENT AND ECONOMICAL DEICING OF ROADS. THESE RATES OF SALT APPLICATION, HOWEVER, ARE NOW SUSPECTED OF DAMAGING ROADSIDE VEGETATION. MEASUREMENTS ON TWO GROUPS OF SUGAR MAPLES WERE MADE TO ASSESS THE INFLUENCE OF SALT ON THE TREES AND ON TISSUE CONCENTRATIONS OF CHLORIDE, CALCIUM, POTASSIUM, MAGNESIUM, AND PHOSPHOROUS AND OF SODIUM. THE STUDIES REPORTED HAVE ESTABLISHED THAT TISSUE CONCENTRATIONS OF SODIUM AND CHLORIDE INCREASE WITH INCREASING EXPOSURE TO ROADSIDE DRAINAGE AND THAT EXPOSED TREES GENERALLY EXHIBIT MORE SEVERE SYMPTOMS OF DECLINING VIGOR AND CONTAIN LOWER CONCENTRATIONS OF SOME ESSENTIAL NUTRIENTS IN THEIR TISSUE. CONCENTRATIONS OF SODIUM AND CHLORIDE IN THE SAP SUGGESTED CHLORIDE UPTAKE BY MAPLES IS NORMALLY SLIGHT, BUT MAY INCREASE MARKEDLY AT TIMES, POSSIBLY REFLECTING EXPOSURE TO RUNOFF OF BRINE IN LATE WINTER OR EARLY SPRING.

Paper sponsored by Committee on Roadside Development and presented at the 45th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01410113

HS-000 708

pp 121-131

1967

Highway Research Record

Digital/other

Figures (5) ; References (10) ; Tables (8)

Calcium chloride; Concentration (Chemistry); Deicers (Equipment); Drainage; Halite; Hardwoods; Measurement; Protection against environmental damage; Roadside; Runoff; Trees

Concentration; Deicers

Design; Environment; Highways; Hydraulics and Hydrology; Maintenance and Preservation; Vehicles and Equipment

TRIS, TRB

Apr 27 1994 12:00AM

• AESTHETICS OF HIGHWAY DRAINAGE DESIGN
• CALIFORNIAS SCENIC HIGHWAY PROGRAM
• COMPARATIVE ANALYSIS OF FORCE ACCOUNT AND CONTRACT MOWING COSTS
• ENVIRONMENTAL VALUES IN REGIONAL HIGHWAY DESIGN
• HIGHWAYS AND OUTDOOR RECREATION
• OPTIMUM UTILIZATION AND SELECTION OF MOWERS FOR HIGHWAY RIGHTS-OF-WAY
• REGENERATION OF WOODY VEGETATION ALONG ROADSIDES
• REST AREA SANITARY DISPOSAL SYSTEMS
• ROAD SALT /SODIUM CHLORIDE/ INJURY TO KENTUCKY BLUEGRASS
• SCENIC ROADS AND PARKWAYS
• THE GREAT RIVER ROAD - A MODEL FOR AMERICA'S SCENIC ROUTES
• THE HIGHWAY-LANDSCAPE NEXUS
• TURF ESTABLISHMENT ON HIGHWAY RIGHT-OF-WAY SLOPES - A REVIEW