ch14studyguide.docx - Ch14 studyguide 14.1 Sketch a basic...

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Ch14 studyguide 14.1 : Sketch a basic drainage basin model. 14.2 : Describe different types of drainage patterns. 14.3 : Explain stream discharge calculation, measurement, and variation over space and time. 14.4 : Describe the processes involved in stream erosion and sediment transport. 14.5 : Explain stream gradient and discuss the processes by which streams adjust their gradient over time. 14.6 : Describe the depositional landforms associated with river systems. 14.7 : Explain flood probability estimates. 14.8 : Discuss floodplain protection using artificial levees. Fluvial - stream-related processes Erosion - in fluvial systems is the process by which water dislodges, dissolves or removes weathered surface material Deposition - process where weathered, wasted and transported sediments are laid down by gravity, wind, water and ice. Drainage basin - basic spatial geomorphic unit of a river system; a major drainage basin system is made up of many smaller drainage basins, each of which gathers and delivers its runoff and sediment to a larger basin, eventually concentrating the volume into the main stream; open systems. Sheet flow - surface water that moves downslope in a thin film as overland flow; not concentrated in channels large than rills Interfluve - the high ground that separates one valley from another and directs sheet flow Continental divides - a ridge or elevated area that separates drainage on a continental scale The ultimate outlet for most drainage basins is the ocean. Internal drainage - in regions where rivers do not flow into the ocean, the outflow is through evaporation or subsurface gravitational flow.
Drainage density - a measure of the overall operational efficiency of a drainage basin, determined by the ratio of combined channel lengths to the unit area Distinctive patterns can develop based on a combination of factors: 1. Regional topography and slope inclination 2. Variations in rock resistance 3. Climate and hydrology 4.

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