BREE 217 Study Guide - Final Guide: Impact Assessment, Field Capacity, Perennial Stream
11 Apr 2017
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Document Summary
Bree 217 hydrology and water resources 2017 final review. Precipitation is the single strongest variable driving the hydrological process. Snow, sleet or freezing rain, hail, rain. Measures the weight of air molecules per unit area: density of air molecules decreases with elevation, ap decreases with elevation. High- intensity rainfalls: - have larger diameter raindrops as well as a wider range of raindrop diameters. Standard rain gauge: a funnel attached to a graduated cylinder or bottle, fits into a larger container, the outsider container will catch he overflows. Weighing recording gauge: a spring scale beneath the collecting bucket platform, calibrated to show rainfall depth on a paper chart, does not underestimate intense rain, it can measure other forms of precipitation including rain, hail and snow. Tipping bucket rain gauge: a funnel that collects and channels the precipitation into a seesaw-like container, dumping the collected water and sending an electrical signal, less expensive, require less maintenance, less accurate.
