THE DEPTH OF RAIN WATER ON ROAD SURFACES

THE DEPTH OF WATER RESULTING FROM STEADY RAINFALL ON PLANE ROAD SURFACES OF BRUSHED CONCRETE AND ROLLED ASPHALT WITH CHIPPINGS IS DISCUSSED. THE SURFACES WERE STUDIED WITH THE AID OF A LARGE TILTING PLATFORM WHICH COULD BE SPRAYED WITH WATER TO SIMULATE RAINFALL OF VARIOUS INTENSITIES. THE DISTRIBUTION OF WATER ON THE SURFACES OF ROLLED ASPHALT WITH CHIPPINGS AND ON THE BRUSHED CONCRETE WERE SIMILAR, INDICATING THAT AS FAR AS THE HYDRAULICS OF RAIN WATER FLOW IS CONCERNED, THE SURFACES CAN BE CONSIDERED TO HAVE SIMILAR ROUGHNESS. THIS IS PROBABLY DUE TO THE RAINDROP IMPACT BEING THE SIGNIFICANT FACTOR AFFECTING THE SHALLOW WATER FLOW. INCREASING THE SLOPE OF A ROAD PAVEMENT FROM 1 TO 60 TO 1 IN 30 DECREASES THE DEPTH OF WATER ON THE ROAD BY ONLY 11 PERCENT AND IT CONCLUDED THAT THE MAJOR BENEFIT OF A STEEP CROSSFALL IS THE REDUCED VOLUME OF WATER WHICH CAN POND IN DEFORMATIONS OF THE PAVEMENT. /AUTHOR/

  • Supplemental Notes:
    • Rrl Rept Lr 236, 19 PP
  • Corporate Authors:

    Road Research Laboratory /UK

    ,    
  • Authors:
    • Ross, N F
    • Russam, K
  • Publication Date: 1968

Subject/Index Terms

Filing Info

  • Accession Number: 00204231
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jan 12 1970 12:00AM