Partly Confined - Planform Controlled 

Logan River: 41°55′08.73″ N, 111°33′50.51″ W 

Provisional Name: 

Partly-confined, planform controlled, anastomosing, discontinuous floodplain, low sinuosity,  gravel bed

Possible beaver activity with anthropogenic confinement on one margin.  

Confinement: 

Confinement was measured by dividing the length of the confining margins by the total length of the channel. 108 m (confining margins) / 904 m (channel length) = 0.11. 

This reach is 11% confined. Which makes it Partly- Confined, Planform Controlled. 

Constriction: 

This reach is minimally constricted because it only has confining margins on one side of the river at each section and doesn't feature a significant channel narrowing where constriction would be occurring. 

Site Length: 

This reach is 878 meters from top to bottom. 

Riverscape Width: 

The widest part of the channel in this section is about 19.5 meters (this is the widest part of the active channel). The rest of the channel is relatively similar with an average width of about 11 meters. 

Total area of valley bottom: 168,318.32 square meters 

Proportion of Valley Bottom Channel: 

Area of active channel / area of valley bottom = 11,760 sq meters / 168,318 sq meters = 0.07

7% of the valley bottom is active channel 

Proportion of Valley Bottom in Active Floodplain: 

Area of active floodplain  / area of valley bottom = 55,071.84 sq meters / 168,318.32 sq meters = 0.327

33% of the valley is active floodplain 

Proportion of Valley Bottom Inactive: 

Area of inactive floodplain  / area of valley bottom = 101,486.48 sq meters / 168,318.32 = 0.60

60% of the valley bottom is inactive floodplain