THE EFFECTS OF RAINFALL INTENSITY, PAVEMENT CROSS SLOPE, SURFACE TEXTURE, AND DRAINAGE LENGTH ON PAVEMENT WATER DEPTHS

THIS REPORT CONTAINS AN EQUATION WHICH CAN BE USED TO PREDICT THE WATER DEPTH A PAVEMENT WILL HAVE WHEN THE TEXTURE DEPTH, DRAINAGE PATH LENGTH, RAINFALL INTENSITY, AND CROSS SLOPE ARE KNOWN. EQUATIONS THAT RELATE THESE VARIABLES AND THEIR RELATIVE EFFECTS TO WATER DEPTH ARE DEVELOPED. RESULTS ARE PRESENTED IN BOTH TABULAR AND GRAPHIC FORM. BACKGROUND INFORMATION AND PERTINENT PAST RESEARCH PERTAINING TO HYDRAULICS OF WATER FLOW OVER PAVED SURFACES ARE GIVEN. NINE DIFFERENT TYPE SURFACES WERE TESTED. THE SURFACES WERE PLACED ON INDIVIDUAL 28' X 4', DOUBLE TEE, PRESTRESSED CONCRETE BEAMS. RAINFALL OF UNIFORM INTENSITY WAS APPLIED TO THE SURFACE. WATER DEPTH MEASUREMENTS WERE TAKEN AT REGULARLY SPACED DRAINAGE LENGTHS FOR VARIOUS COMBINATIONS OF RAINFALL INTENSITY AND PAVEMENT CROSS SLOPE. MULTIPLE REGRESSION ANALYSES WERE USED TO DETERMINE THE BEST FIT OF THE DATA. PAVEMENT CROSS SLOPE WAS FOUND TO AFFECT WATER DEPTHS SIGNIFICANTLY. FOR A RAINFALL INTENSITY OF 1.5 IN/HR, A SURFACE TEXTURE OF 0.03 IN., AND A DRAINAGE LENGTH OF 24 FT., INCREASING THE CROSS SLOPE FROM 1/16 IN/FT (1:192) TO 1/4 IN/FT (1:48) DECREASED WATER DEPTHS BY 62 PERCENT IN THE OUTSIDE WHEEL PATH. CORRESPONDINGLY, INCREASES IN SURFACE TEXTURE DECREASED WATER DEPTHS; WHEREAS, INCREASES IN RAINFALL INTENSITY AND DRAINAGE LENGTH INCREASED WATER DEPTHS. /FHWA/

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Gallaway, B M
    • Schiller, R E
    • Rose, J G
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00204041
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Study No 138
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 27 1972 12:00AM