HYDROLOGIC RECONNAISSANCE OF THE DELTA RIVER AND ITS DRAINAGE BASIN, ALASKA

A ONE-YEAR RECONNAISSANCE STUDY WAS MADE OF A LARGE BRAIDED GLACIAL RIVER AND ITS DRAINAGE BASIN (DRAINAGE AREA 1665 SQ M; ELEVATION RANGE 1000 - 10,000 FT) FOR WHICH A MINIMUM OF HYDROMETRIC AND METEOROLOGIC DATA EXISTED. THE REPORT INCLUDES ESTIMATES OF THE WATER BALANCE, FLOW- DURATION CURVES, SEDIMENT CHARACTERISTICS, AND DESCRIPTIONS OF STREAM RESPONSE TO GLACIAL MELT AND RAIN, CHANNEL GEOMETRY AND CHANNEL PROCESSES. MEAN ANNUAL BASIN PRECIPITATION IS ESTIMATED AT 40.4 IN. AND MEAN ANNUAL LOSS OF PERMANENT GLACIAL STORAGE IS ABOUT 1 IN. ABOUT 30% OF THIS LEAVES THE BASIN AS EVAPO-TRANSPIRATION, 50% AS STREAM FLOW, AND 20% AS GROUNDWATER FLOW. CHARACTERISTICS OF RESPONSE TO GLACIAL MELT ARE OUTLINED. FLOW PEAKS, NEAR THE MOUTH, OCCUR WITHIN 24 HOURS OF RAINFALL GREATER THAN 0.5 IN./DAY AT THE FOOTHILLS METEOROLOGICAL STATIONS; RAINS LESS THAN THAT AMOUNT DO NOT GENERALLY PRODUCE DISCERNIBLE STREAM RESPONSE. STREAM CHANNEL GEOMETRY IS DESCRIBED IN DETAIL. MOST CHANNELS ON THE LOWER FLOODPLAIN ARE ASYMMETRICAL AND ARE ROUGHLY TRIANGULAR OR PARABOLIC, AND HAVE HIGH WIDTH/DEPTH RATIOS. HYDRAULIC GEOMETRY IS DESCRIBED FOR A PARTICULAR STATION. SURVEYS AND GROUND AND AERIAL PHOTOGRAPHY ARE USED TO DESCRIBE CHANNEL CHANGES. /AUTHOR/

  • Supplemental Notes:
    • Rr 262, 83 PP, 40 FIG, 21 TAB, REFS, 4 APP
  • Authors:
    • Dingman, S L
    • Samide, H R
    • Saboe, D L
    • LYNCH, M J
    • Slaughter, C W
  • Publication Date: 1971-2

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Filing Info

  • Accession Number: 00204383
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 29 1971 12:00AM