Population. Development. Migration TPL 2. Migration TPL. Health. Book Summary. PLC. Physical. Cold Environment. Formation of a corrie. Rivers. Rejuvenation. Changing Channel characteristsics. Width and depth are simple variables and generally increase downstream as more water is added from tributaries. Width can be derived either from the water surface width (occupied channel width) or from measuring from bank to bank, giving the bank full width. We can calculate the stream order from source to mouth too, and this gives us an indication of the size and shape of river channels. The stream order is calculated as follows; Stream order 1 streams have NO tributaries feeding into them, they are the original streams that start at springs up in the source. Stream order 2 streams occur where two stream order 1 rivers come together at a confluence Stream order 3 streams occur where two stream order 2 rivers come together at a confluence (not a stream order 2 with a 1, it must be the SAME stream order meeting) The stream order continues like this.
Wetted Perimeter is the measure of how much water contact there is with the bed and the banks of a river. Source. Formation of a delta. River Landforms - The British Geographer. River Landforms Changing River Profiles Changing River Profile Before looking at specific river landforms it is important to look at how the river channel itself changes downstream. We have already looked at how the river channel in the upper course is shallow and narrow with large bedload that disrupts the efficiency of flow. The bedload is derived mainly from mass movements from the valley sides and eroded rock from the bed and banks of the channel.
The valley profile is really just an extension of the channel itself; it follows a symetrical v-shaped form. This narrow valley and river channel is caused by vertical erosion as a result of the high potential energy of the river. Upper Course Landforms V-shaped Valleys and Interlocking SpursRivers are constanlty modifying their channel and surrounding landscape. 2012 CLEO (Cumbria and Lancashire Education Online) Potholes Wind turbulence over a building similar to river eddie development Rapids Waterfalls Variations in Waterfalls Braided Channels. Deltas.