Channel networks in the glaciated mountain basins of Coastal and southern interior British Columbia (Ashnola River Basin) offer opportunities for morphometric studies relating the parameters of the flow area (A) - discharge (Q) relationship to readily available channel and basin parameters.
Steady flow conditions in rough channels are approximated by equations of the form A = a[formula omitted]Q[formula omitted] . The parameters, a[formula omitted] and b[formula omitted], vary individually with each channel and are related to channel dimensions; a[formula omitted] = .94 W[formula omitted]·⁴⁷ and b[formula omitted] = .3 W[formula omitted]·¹⁷. These results are independent of climate and under normal conditions give excellent predictions of the Q-A relations for rough channels in both regions.
The systematic variation of channel dimensions within a basin are related to drainage area:W[formula omitted] = 3.7 DA·[formula omitted] for coastal basins and W[formula omitted] = 1.3 DA[formula omitted] for Ashnola basins. The influence of climate is reflected in the constants, with areas of higher precipitation having larger constants. Drainage area can replace W[formula omitted]: a[formula omitted] = 1.74 DA[formula omitted] and b[formula omitted] = .37 DA[formula omitted]. These relations are applicable only within a climatically homogeneous region.
In rough channels the Q-A relations are considered independent of slope, a result of energy dissipation through frequent hydraulic jumps.
The hydromorphological equations developed here are valid only for rough channels where tumbling flow predominates. / Arts, Faculty of / Geography, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/34941 |
| Date | January 1969 |
| Creators | Day, Terence James |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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