Catchment-Scale controls of River Geomorphology
Map of the Logan River Watershed
Longitudinal Profile
Above is the general longitudinal profile as provided by Google Earth Pro.
The base-level control of the Logan River today can be seen in the accumulation zone at 4403 feet elevation, pictured above and indicated with a red arrow.
The total length of the mainstream of the Logan River is about 82 kilometers.
In figure 1, concavity has been calculated to be 0.2700 m.
Figure 2 shows us the active knickpoints of the Logan River. The first knickpoint (near mile 20), is likely due to Third Dam. The second knickpoint (past mile 45), likely has a slightly increased slope. We won't be able to know for sure unless the site is visited.
Catchment Morphometrics
Table 1. The catchment length of the Logan River Watershed is 184000m. Catchment area is 646.03 square kilometers or 646030042.13 square meters. The catchment perimeter length is 67.96 km making the circularity ratio 0.3 and the elongation ratio 0.4. I wasn't able to calculate the correct form factor, as I kept getting an answer of 0.4. Catchment relief is 1125.3 meters making the relief ratio 0.017. Drainage density is 0.32 km km-2. The drainage pattern of the Logan River is dendritic.
Stream Order
Figure 3. Beaver Creek order of stream
Stream order for Logan River at it's mouth is 5. Beaver Creek is stream order 3 at it's mouth (drawn out in Figure 3 below). Temple Fork's stream order is 4 at it's mouth.
The Logan River follows the first and second laws of Horton's Laws of Network Composition. However, it doesn't seem that catchment area increases as the stream order gets larger. It appears to stay the same until the mouth of Logan Canyon, where catchment area becomes more narrow even after entering Cache Valley.