EESB03H3 Lecture Notes - Lecture 10: Pluvial, Hydrograph, Baseflow
11 Oct 2016
School
Department
Course
Professor
Document Summary
With other factors in a watershed being considered: as in a storm or snowmelt, the hydrograph. Discharge: another word for streamflow; in m3/sec. Runoff: r; = q/a: over different time periods, but usually during one storm, but also an annual display. Different parts of the hydrograph: antecedent flow rate: base flow. Coming from groundwater if there is no precipitation rising limb peak flow rate: always after the peak rainfall falling limb groundwater recession: occurs for quite awhile then we can relate storm flow to rainfall. * time of rise (vs. basin lag): time from start of storm to peak flow rate * * vs. basin lag: from median point of storm to peak flow rate * ** some important questions/considerations: *: how big is peak flow, how much (water) is there, how long (time) to get to peak flow, how long (time) to get back to base flow, runoff ratio or coefficient (rc)
