Measuring river water discharge

Apr 15th, 2015
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Dongguk Royal University
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In hydrology, discharge is the volume rate of water flow, including any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms), which is transported through a given cross-sectional area. Frequently, other terms synonymous with discharge are used to describe the volumetric flow rate of water and are typically discipline dependent. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system might define discharge as outflow, which is contrasted with inflow.

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Measuring river water dischargeRiver Gauging1.1IntroductionWhat is gauging?What is stream flow?What constitute stream flow?Stream flow measurementThe common terms in stream flow measurementRiver or stream gauging; HydrometryWater level/stageDischarge measurementWater level measurementMeasurement of stream velocityComputation of dischargeStream gauging stations Site selection criteria1.2Stage measurementWater levels of rivers, lakes and reservoirsStage measuring instrumentsStaff gaugesManually operated weight/electric sensorsFloat operated stage gaugesDepth sensorsProcedures for stage measurementFrequency of stage measurements 1.3 Discharge measurementVelocity Area methodControl structuresDilution gauging1.3.1Velocity Area methodDetermination of cross-sectional area of streamMeasuring velocity of flow

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