GEOB 103 Lecture 6: Lecture 6 Notes
14 Sep 2018
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Document Summary
Drainage divide: the limit that defines the edge of the drainage basin. The boundary between two drainage basins is the boundary between where water flows away (the topographic high) Water is the most important resource in a drainage basin. Sediment budgets: describe the flux of sediment through a drainage basin, considering sources and sinks using a mass-conservation approach, there are 3 main things to consider: Transport network --> e. g. most of the time via upland erosion, landslides (could be added on in different parts of the sediment budget. Storage --> changes in storage is influenced by input and output. Upland erosion: sediment sources are dominated by hill slope erosion, episodic, short-term (but long-term can also exist, although they are very different), most sediment is being stored. Residence time: how long does the average sediment sit there in storage, not coming out of the drainage basin, dependent on. Streams in steep and narrow valleys usually have no.
