THE EFFECTS OF URBANIZATION ON UNIT HYDROGRAPHS FOR SMALL WATERSHEDS HOUSTON, TEXAS 1964-1967 AND APPENDICES-DATA COMPILATION

THE PAST AND FUTURE EFFECTS OF URBANIZATION ON SEVERAL SMALL WATERSHEDS IN HOUSTON, TEXAS, WAS DETERMINED AND EQUATIONS DEVELOPED TO DESCRIBE THE EFFECTS OF URBANIZATION ON THE UNIT HYDROGRAPH. RAINFALL AND RUNOFF DATA FROM 11 URBAN AND 6 RURAL WATERSHEDS IN HOUSTON WERE REDUCED AND THE THIRTY-MINUTE UNIT HYDROGRAPHS OBTAINED. THIS DATA WAS COMBINED WITH PREVIOUSLY REDUCED DATA FOR 22 URBAN AND 11 RURAL WATERSHEDS. MULTIPLE LINEAR REGRESSION ANALYSIS WAS THEN PERFORMED TO DEVELOP EQUATIONS WHICH DESCRIBE THE THIRTY-MINUTE UNIT HYDROGRAPH FOR BOTH URBAN AND RURAL CONDITIONS. THESE EQUATIONS WERE THEN COMPARED TO PREVIOUSLY DERIVED EQUATIONS AND THE EQUATIONS OF BEST FIT WERE DETERMINED. THE EQUATIONS OF BEST FIT CAN BE USED TO PREDICT THE EFFECTS ON THE UNIT HYDROGRAPH OF CHANGES IN IMPERVIOUS COVER, CHANNEL CONDITIONS AND SECONDARY DRAINAGE FACILITIES DUE TO URBANIZATION. THE EQUATIONS WERE APPLIED TO WATERSHEDS IN HOUSTON, TEXAS, AND INDICATE THAT IN CHANGING FROM A RURAL TO A HIGHLY URBANIZED WATERSHED THE THIRTY- MINUTE UNIT HYDROGRAPH MAY EXPERIENCE AN INCREASE IN PEAK DISCHARGE OF UP TO 500 PERCENT AND A DECREASE IN TIME OF RISE OF UP TO 90 PERCENT. /AUTHOR/

  • Supplemental Notes:
    • Doc No 68-975-U & 68-1006-U, PP 1-70, 19 FIG, 8 TAB, 8 REF,
  • Corporate Authors:

    Tracor

    ,    
  • Authors:
    • Espey, W H
    • Winslow, D E
  • Publication Date: 1968-9-25

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Filing Info

  • Accession Number: 00204196
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 10 1994 12:00AM