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28問 • 1年前

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Racial between water received at the inlet for a block of fields to that release at the projects headwork

Conveyance efficiency

Amount of water used in producing crops, which is the sum of a evapotranspiration or consumptive views, plus C page and percolation losses

Crop water requirement

Rate of evatranspiration from a reference surface, which is hypothetical reference crop with an assumed crop height of 0.2 m fixed surface resistance of 72nd per meter and an albedo of 0.23

Reference crop evapotranspiration

Channel which conveys irrigation water from the tornado to the Paddy field

Farm ditch

Downward movement of water below ground surface

Percolation

Lateral movement of water below ground surface

Seepage

One of the methods used to measure the convenience losses in open channels were a section of the selected channel shall be analyzed, using the water balance

Inflow – outflow

An overflow structure, built, perpendicular and open channel access to measure the rate of flow of water

weir

In line structure with a geometrically, specified construction built in an open channel, such that the centerline coincides with the centerline of the channel in which the flow is to be measured

Flume

Measuring device with a well-defined sharp edged opening in a wall, through which flow occurs such that the upstream water level is always well above the top of this opening

Orifice

Velocity measuring device used in a sample point through which the partial discharge can be obtained

Current meter

Average sprinkler pressure of a lateral

Average pressure

Pressure required overcome the elevation difference between the water source and the sprinkler nozzle to counteract friction losses and provide adequate pressure at the nozzle for good water distribution

Design pressure

Numerical value on the uniformity of application for agricultural irrigation system

Distribution uniformity

Time required to cover an area with one application of water

Irrigation period

Delivers water from the source to the pipe system at an adequate capacity

Pump unit

Consist of screen openings considerably lower than the nozzle diameter to prevent nozzles from clogging

Filtration system

Device of various nozzle sizes which sprays water over the ground or crop

Sprinklers

Pipes which can be water from the pump to the laterals

Mainline and sub main lines

Deliver water from the main lines or sub main lines to the sprinklers

Laterals

Volume below the intake structure computed as V equals 20,900 times a race to the power of 0.687 were a S equal to drainage area with a unit of square kilometers sediment volume based on 25 years of accumulation on in the reservoir

dead storage

Vertical distance, measured from the top of the dam down to the bedrock rock

Structural height

Ratio of the storage capacity to the total earth volume required for the embankment construction, which indicates the relative cost of the different types of reservoir

Storage ratio

Internal erosion induced by aggressive, erosion of particles from downstream, and along the upstream line towards an outside environment

Piping

Damn, that relies on rock either dumped and lift or compacted in layers as a major structural element, where an impervious membrane is used as the water barrier, and can be placed either within the embankment or an upstream slope

rockfill dam

Small barrier built across the direction of water, flow and shallow, rivers and stream intended to convey runoff during peak flow and the slow and hold surface water long enough for the water to deposit sediment it is carrying

Check dam

Stones wrapped in wire fence, mashes for added, stability and strength

gabion

Pumping of water from a fully developed well at the controlled rate, and I’m serving with respect to time the draw down into two or more observations well in order to determine the aquifer hydrologic properties

Pumping test

Materials

ユーザ名非公開 · 100問 · 2年前

Materials