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TeachMeFinance.com - explain weir weir The term 'weir' as it applies to the area of reclamation can be defined as ' An overflow structure built across an open channel to raise the upstream water level and/or to measure the flow of water. A measuring or gaging weir is calibrated for depth of flow over the crest. A weir generally consists of a rectangular, trapezoidal, triangular, or other shaped notch, located in a vertical, thin plate over which water flows. The height of water above the weir crest is used to determine the rate of flow. See Cipolletti weir, rectangular weir, and v-notch weir. Other types of weirs include broad-crested weir, sharp-crested weir, drowned weir or submerged weir. See contracted weir and suppressed weir'. The term 'weir' as it applies to the area of coastlines can be defined as ' a low dam or wall across a stream to raise the upstream water level. termed fixed crest weir when uncontrolled'. Previous 5 Terms: Weight of one snowflake Weight of one thunderstorm weight on an edge Weighting factor (WT) Weighting of a slope Next 5 Terms: Weld well well (water) Well field Well graded About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.