PLAN341 Study Guide - Midterm Guide: Baseflow, Evapotranspiration, Water Balance

• School: University of Waterloo
• Department: Planning
• Course: PLAN341
• Professor: Mike Stone

Document Summary

Occurs when the soil becomes saturated, and any additional precipitation or irrigation causes runoff. This is in contrast with hortonian infiltration-excess runoff generation, which depends on soil type (infiltration rate vs. rain intensity) but is independent of position in the landscape, with the runoff generating area always the same. Causes a change in hydrographs, found in many urban systems. Water runoff is more quick with less concentration time. It influences drainage in a system by a: Decrease in groundwater coming into the system, so baseflow is lower. Used to express contributions of hydrologic processes to stream flow. ** variables are measured in mm over time. For at a watershed scale: r = p-e-gs. G = losses to regional groundwater (water that leaves the watershed as groundwater) W = change in soil water storage. F = infiltration (f=p-i-o) p = precipitation, i = interception, o = overland flow.