Accession Number:

ADA615402

Title:

Flow Control and Design Assessment for Drainage System at McMurdo Station, Antarctica

Descriptive Note:

Final rept.

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB

Report Date:

2014-11-24

Pagination or Media Count:

104.0

Abstract:

Runoff at McMurdo Station is driven primarily by the melting of snow and glacier ice. Snowmelt runoff passes through McMurdo via a system of drainage ditches, gullies, and culverts. Ultimately, the snowmelt runoff discharges into Winter Quarters Bay and McMurdo Sound through several discharge points. Although the most extreme runoff, during heavy flow has not been measured, we have observed that the runoff mobilizes sediment, erodes the drainage channels and embankments, and overflows onto roads. The objectives of this study were to manage flow to minimize erosion and to improve the drainage system by modeling high flows, designing control measures, and evaluating existing culvert and snow dump locations at McMurdo Station. Flow modeling and structural analyses were conducted to determine design parameters for control measures, including rock and wooden weirs to evaluate various design alternatives against erosion control metrics to evaluate culvert conditions and to investigate an alternative flow path and sediment ponds. A qualitative review of culvert conditions and snow dump locations was also performed. This report identifies specific mitigation recommendations using these control measures, which will help prevent future overflow and deterioration of the McMurdo drainage system.

Subject Categories:

  • Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE