1. What are two differences between the mouth and the source of a river?
source: where the river begins, usually at elevation, from a glacier or spring or rain run off. It is usually a steeper gradient and the river is less wide, more larger boulders etc...
mouth: where the river ends and meets an ocean, another river or a lake. Usually flow is slower and river is wider here. Sometimes creates a delta or estuary here. Lower elevation and more small rocks, not really large boulders.
2. What are some things that characterize a young river?
Steeper, rapids, waterfalls and canyons, flow is pretty straight, less tributaries as drainage basin is less developed, V shaped, narrow valley, stream bed is lined with boulders, cobbles, rock
3. List two drainage patterns of a river (or sketch them).
dendritic, trellis, parallel, radial, deranged
4. What are the four ways that a river erodes a landscape?
Erosion happens via Abrasion, Attrition, Hydraulic Action & Solution
Abrasion: causes river bed to become deeper through the action of scraping or wearing away
Attrition: stones and rocks knock together breaking into smaller particles so the bedload is breaking itself apart or by hitting the bed
Hydraulic Action: the ability of moving water to dislodge and transport rock particles, breaking up the banks
Solution: Water dissolved soluble materials
5. List two ways that humans try to manage river flow?
Dams, reservoirs, levees, dykes, hydroelectric power stations, dredging
