GEG 3102 Lecture Notes - Lecture 4: Baseflow, Thalweg, Hydrograph
17 Oct 2016
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Document Summary
The term is not well defined/standardized, can lead to miscommunication. Central in the study of hydrology (benchmark special unit) Def. the drainage area of a lake/river and its tributaries, and is separated from other watersheds by drainage divides. Defined by its outlet (where the water exits the watershed) and by its drainage divides. Interfluves highest point; thalweg lowest point of the river. Effective: includes water gained from other watersheds, and excludes water lost in the same way (underground flow) Watersheds can be modified, both by natural changes and by human activity. Can have a large impact on erosion, transport and deposition of material, as well as on the ecology of the region. Nechako plateau: a dam was built which flooded the area and changed the output of the drainage basin (used to drain east into the fraser, now drains to the west. It is important to understand the base conditions of a watershed.
