Accession Number:

AD0722217

Title:

Hydrologic Reconnaissance of the Delta River and its Drainage Basin, Alaska,

Descriptive Note:

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Report Date:

1971-02-01

Pagination or Media Count:

92.0

Abstract:

A one-year reconnaissance study was made of a large braided glacial river and its drainage basin for which a minimum of hydrometric and meteorologic data existed. The report includes estimates of the water balance, flow-duration curves, and 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 evapotranspiration, 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 foothills meteorological stations rains of 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 widthdepth ratios. At-a-station hydraulic geometry is described. Surveys and ground and aerial photography are used to describe channel changes. Author

Subject Categories:

  • Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE