DRAINAGE OF WATER

DRAINAGE DE L'EAU

THE OBJECT OF THE STUDY IS TO GAIN A BETTER UNDERSTANDING OF THE LAWS GOVERNING PAVEMENT SURFACE RUN-OFF, FREE RUN-OFF OR RUN-OFF INDUCED BY TYRES FOR THE MOST COMMON GEOMETRIC CONDITIONS OF THE PAVEMENT, TAKING MACROROUGHNESS INTO ACCOUNT. A HIGH-OUTPUT APPARATUS FOR MEASURING A REPRESENTATIVE PARAMETER OF THE QUALITY OF THE RUN-OFF WILL BE STUDIED. THREE APPARATUS FOR STUDYING RUN-OFF CHARACTERISTICS ARE BEING DEVELOPED: "DRAINOROUTE" (ROAD DRAINAGE METER SIMPLE MEASURING DEVICE FOR SHORT SECTIONS), A.T.R. AND MICROWAVE MEASUREMENTS. RUN-OFF DATA PROCESSING SIMULATION HAS BEEN UNDERTAKEN. IN 1979 A COMPARATIVE STUDY OF MEASUREMENTS MADE WITH VARIOUS DEVICES WILL BE CONDUCTED TOGETHER WITH AN INVESTIGATION INTO THE PERFORMANCE OF THEORETICAL RUN-OFF MODELS FOR VARIOUS SURFACES AND AN IMPROVEMENT IN DATA COLLECTION.