MAN-MADE CHANNEL ALTERATIONS IN THIRTEEN MONTANA STREAMS AND RIVERS

A STREAM CHANNEL ALTERATIONS INVENTORY WAS TAKEN IN MONTANA TO MEASURE THE AMOUNT OF STREAM CHANNEL CHANGED BY MAN, THE TYPE OF CHANNEL ALTERATIONS AND THE PARTY RESPONSIBLE FOR THE ALTERATION. FOR COMPARATIVE PURPOSES, STANDING CROP ESTIMATES OF THE FISH POPULATION WERE CENSUSED IN BOTH NATURAL AND ALTERED CHANNELS IN THE STREAMS SURVEYED. AERIAL PHOTOGRAPHS WERE USED TO MEASURE THE ORIGINAL LENGTH OF THE STREAM CHANNEL. BLUEPRINTS OF CONSTRUCTION PROJECTS ADJACENT TO RIVERS AND STREAMS WERE OBTAINED FROM THE MONTANA HIGHWAY DEPARTMENT AND FROM RAILROAD COMPANIES. THERE WERE 1,987 INDIVIDUAL ALTERATIONS IN THE 768 MILES OF STREAM CHANNEL INVENTORIED. AS A RESULT OF THE MAN-MADE ALTERATIONS, THE LENGTH OF THE CHANNELS WAS SHORTENED BY 68 MILES. AGRICULTURAL ACTIVITIES ACCOUNTED FOR THE GREATEST LENGTH OF CHANNEL ALTERED FOLLOWED IN ORDER BY RAILROAD CONSTRUCTION, ROAD CONSTRUCTION, AND URBAN AND INDUSTRIAL DEVELOPMENT. RELOCATED CHANNELS ACCOUNTED FOR THE GREATEST LENGTH OF CHANNEL ALTERED FOLLOWED IN ORDER BY RIPRAPPING, DIKING, AND CHANNEL CLEARANCE. STANDING CROPS OF GAME FISH WERE SEVERAL TIMES MORE ABUNDANT IN NATURAL, MEANDERING CHANNELS THAN IN ALTERED CHANNELS.

  • Supplemental Notes:
    • pp 93-102, 4 TAB, 4 REF
  • Corporate Authors:

    Wildlife Management Institute

    ,    
  • Authors:
    • Peters, J C
    • Alvord, W
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00229870
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 26 1970 12:00AM