Lab 11 LAB 11-Fluvial Geomorphology and Maps Key Ideas Drainage basin Stream ord
ID: 292638 • Letter: L
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Lab 11 LAB 11-Fluvial Geomorphology and Maps Key Ideas Drainage basin Stream order Meandering stream Drainage pattem Drainage divide Channel pattern Braided stream Alluvium Diseussion Stream Systems Fluvial landforms are those caused by flowing water. Most flowing water is quickly channelized into streams as it is pulled downhill by the force of gravity. Streams are organized into hierarchical systems of tributaries in which the smallest channels contribute their water and sediment load to medium-sized channels, which in tum drain into larger channels. The area in which an organized system of tributaries lies and from which it gathers its water is called the stream's drainage basin. The drainage basin is the region that contributes water to the stream system. The Miami campus, for example, is in the drainage basin of the Four Mile Creek. Any precipitation that falls on campus and becomes (and stays) overland flow will end up in the Four Mile Creek.But because stream systems are hierarchical, or nested, the Miami campus is also in the Ohio River drainage basin. Overland flow from campus that ends up in the Four Mile Creek will drain into the Great Miami River, which will drain into the Ohio River, unless it's evaporated en-route. A tributary's drainage basin is encompassed by, is a subbasin of, the drainage basin of the stream into which it flows A drainage basin is separated from an adjacent one by a drainage divide. This boundary between drainage basins occurs at the highest ground that lies between them. If on a topographic map we draw the drainage divide all around a drainage basin, we will also be outlining the perimeter of that basin Stream ordering is a way of keeping track of where an individual stream and its drainage basin lie in the hierarchy of tributaries and drainage basins (Fig. 10.1). First-order channels are not fed by other continuously flowing tributaries. They are the smallest channels in the drainage basin and tend to be found in the most distant upstream reaches of the drainage basin. Where two first-order channels join, a second- order channel is formed. Figure 10.1. An example of stream ordering and a third-order drainage system It takes two second-order channels to make a third-order channel regardless of how many first-order streams 87 GEO 121 D-G- Spring 2018Explanation / Answer
A) The Carter river system have trellis drainage pattern as primary tributaries flow parallel to each other and secondary tributaries joining them at right angles.
B) 'B' is most likely to has the higher elevation.
C) I disagree with the statement because the drainage pattern of the Carter river is trellis shaped in the Fig.10,3 ,which occurs in the folded mountain rocks. Dome shaped mountain sedimentary rocks can be found in case of radial drainahe pattern.
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