Origin of Anastomosis in the Upper Columbia River - Department of ...
Origin of Anastomosis in the Upper Columbia River - Department of ...
Origin of Anastomosis in the Upper Columbia River - Department of ...
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Figure 5. Generic model <strong>of</strong> anastomos<strong>in</strong>g river with width/depth (W/D) ratios typical <strong>of</strong><br />
<strong>the</strong> <strong>Columbia</strong>. W/D progressively decreases with <strong>in</strong>creas<strong>in</strong>g number <strong>of</strong> channels.<br />
Figure 6. Air photo collage <strong>of</strong> <strong>the</strong> highly anastomose reach <strong>of</strong> <strong>the</strong> <strong>Columbia</strong> <strong>River</strong>.<br />
Measured cross sections are <strong>in</strong>dicated with a white mark; W/D ratio <strong>in</strong> paren<strong>the</strong>ses.<br />
Figure 7. Width-depth ratios <strong>of</strong> channels as a function <strong>of</strong> number <strong>of</strong> channels pass<strong>in</strong>g<br />
flow through any valley cross-section. Ma<strong>in</strong> channels are def<strong>in</strong>ed as those possess<strong>in</strong>g<br />
widths greater than 40 m.
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