GEOG453 Midterm: GEOG 453 - Study Sheet "Quiz" 1.docx

• School: University of Waterloo
• Department: Geography and Environmental Management
• Course: GEOG453
• Professor: Mike Stone

Document Summary

Total length of all the streams and rivers in a drainage basin divided by the total area of the drainage basin. Measures how well or how poorly a watershed is drained by stream channels. Increased dd = increased discharge peak, decreased lag time: coefficient of runoff. Fraction of rainfall that is converted into runoff: design storm. A selected storm event that is described in terms of the probability of it occurring once in a given number of years (e. g. 1/50 year flood, 1/100 year flood, 1/500 year flood). It is the basis for designing appropriate drainage and flood control: idf curve. Intensity duration frequency curve graphical representation of the probability that a given average rainfall intensity will occur. Involves rainfall intensity (mm/hr), rainfall duration (hours at the specific intensity), and rainfall frequency (how often it repeats: subsurface moisture zones. Areas below the surface with increasing saturation levels.