A STUDY OF THE CHANNELIZATION OF THE WEBER RIVER, SUMMIT COUNTY, UTAH

CONSTRUCTION OF INTERSTATE 80 IN HENEFER VALLEY, UTAH RESULTED IN CHANNELIZATION OF 1.6 MILES OF WEBER RIVER. IN AN ATTEMPT TO ALLEVIATE SOME OF THE ADVERSE EFFECTS OF CHANNELIZATION, INSTREAM REHABILITATION STRUCTURES IN THE FORM OF DEFLECTORS AND CHECK DAMS WERE INSTALLED IN THE ALTERED SECTIONS. BECAUSE OF THESE STRUCTURES, HYDROLOGIC FEATURES IN THE CHANGED PORTIONS OF THE RIVER WERE SIMILAR TO THOSE OF THE UNCHANGED AREAS. HOLES WERE SCOURED AROUND THE STRUCTURES AND MATERIAL WAS DEPOSITED BELOW, FORMING RIFFLE AREAS. THERE WERE AS MANY HOLES AND RIFFLES IN THE CHANGED SECTIONS AS IN THE UNCHANGED. CHANNELIZED PORTIONS OF THE WEBER RIVER WERE RAPIDLY POPULATED BY MACROINVERTEBRATES. AFTER SIX MONTHS WITH SUBSTANTIAL STREAM FLOWS AND STABILIZATION OF THE SUBSTRATE, NO DIFFERENCE IN NUMBERS, WEIGHT, OR SPECIES DIVERSITY COULD BE DETECTED BETWEEN THE BENTHOS OF THE CHANGED AND THE UNCHANGED SECTIONS. FISH POPULATION ESTIMATES WERE DIFFICULT TO OBTAIN DUE TO THE SIZE OF THE RIVER, HIGH MOBILITY OF THE FISH, AND LOW SHOCKING EFFICIENCY EXPECIALLY AT HIGH DISCHARGES. HOWEVER, SHOCKING DATA DID INDICATE THAT FISH POPULATIONS WERE ESSENTIALLY THE SAME IN THE CHANGED AND UNCHANGED AREAS AS A RESULT OF THE REHABILITATION MEASURES TAKEN. DELURY POPULATION ESTIMATES COLLECTED IN 1972 INDICATE THAT THE FISH POPULATIONS WERE SMIMILAR IN CHANGED AND UNCHANGED AREAS AND THAT SHOCKING EFFICIENCY DECREASES AS THE NUMBER OF HOLES AND AMOUNT OF COVER INCREASE. REHABILITATION STRUCTURES DID PROVIDE HOLES AND RIFFLES IN THE CHANGED SECTIONS, NEVERTHELESS, CHANNELIZATION SHOULD BE AVOIDED IF AT ALL POSSIBLE SINCE OTHER DELETERIOUS EFFECTS STILL OCCUR SUCH AS LOSS IN STREAM LENGTH, LOSS OF COVER, LOSS IN STREAMSIDE VEGETATION AND LOSS IN AESTHETIC VALUE.

  • Supplemental Notes:
    • 3 APP
  • Corporate Authors:

    Bringham Young University

    ,    
  • Authors:
    • Barton, J R
    • Winger, P V
  • Publication Date: 1973-5

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 154 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00204534
  • Record Type: Publication
  • Report/Paper Numbers: Rinal Rept
  • Files: TRIS
  • Created Date: Jul 16 1974 12:00AM