Flood flows and channel conveyance in the Athabasca River Delta, Canada

Autor: Peter R. B. Ward, Hassen A. Yassien, Stephen J. Burges
Rok vydání: 2010
Předmět:
Zdroj: International Journal of River Basin Management. 8:161-172
ISSN: 1814-2060
1571-5124
DOI: 10.1080/15715121003714951
Popis: Channel conveyance, channel size and water levels in the Athabasca River Delta were investigated in detail during three summer seasons. The Athabasca Delta is between 58°N and 59°N, in Alberta, Canada, and is formed immediately upstream of where the river enters Lake Athabasca. Ice-free flow rates in the river and in the various distributary channels were measured by acoustic Doppler profiler, and water surface elevations by differential GPS and pressure transducer recorders. Approximate values were measured for river bank heights, and a profile of elevation for the river bank for a distance of 80 km upstream of the lake was established. Computed bankfull flows for cross-sections starting at the delta apex were found to reduce significantly in the downstream direction. High values for bankfull conveyance at the head of the delta, equivalent to 50-year return period flood flows, were noted. For medium Athabasca River flows (about 800–1100 m3/s), a comparison was made of water surface elevations at the delt...
Databáze: OpenAIRE
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