GROUNDWATER CONTAMINATION BY HIGHWAY SALTING

AN ABRIDGEMENT IS PRESENTED OF THE PHENOMENA INVOLVED IN GROUNDWATER CONTAMINATION BY HIGHWAY SALTING. OF THE SALT APPLIED TO THE HIGHWAYS A PART EVENTUALLY LODGES IN OR ON NEARBY SOIL. SUBSEQUENT RAINFALL AND SNOWMELT THAT ENTER THE GROUND CARRY SOME SALT DOWN TO THE WATER TABLE IN WAVES OR PULSES AND INJECT IT INTO THE CONTINUOUS SLOW UNDERFLOW OF GROUNDWATER IN THE SATURATED ZONE BELOW THE WATER TABLE. IN THE SATURATED ZONE, THE SALT MOVES LATERALLY ALONG WITH THE GROUNDWATER WHICH, IN GENERAL, ULTIMATELY DISCHARGES INTO SURFACE STREAMS. IN SHALLOW UNCONFINED AQUIFERS IN UNCONSOLIDATED RELATIVELY PERMEABLE MATERIALS, THE CHLORIDE CONCENTRATIONS IN GROUNDWATER CYCLICALLY FLUCTUATE ANNUALLY AND THE CHLORIDE CONTENT INCREASES ONLY UNTIL A BALANCE IS REACHED BETWEEN SALT RECHARGE AND THE CONTINUOUS FLUSHING AND DILUTION BY GROUNDWATER.

Media Info

  • Media Type: Print
  • Pagination: p 34
  • Monograph Title: Environmental considerations in use of deicing chemicals
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00234190
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jan 16 1994 12:00AM