36 Questions
What is the main difference between a confined aquifer and an unconfined aquifer?
The groundwater in a confined aquifer is under pressure, while in an unconfined aquifer it is not.
What does the term 'critical depth' refer to in the context of water flow?
The depth at which no other backwater forces are involved in the flow.
What factor affects the application efficiency of irrigation?
The salinity of the soil.
What defines the term 'crop coefficient' in agriculture?
The ratio of actual crop evapotranspiration to potential evapotranspiration.
What does 'algal bloom' in water indicate?
Overgrowth of algae producing dangerous toxins in water.
What does 'conveyance efficiency' measure in an irrigation project?
The ratio of water received at the inlet to water released at the project's headwork.
'Border irrigation' involves directing water flow down slopes along what?
Parallel border strips.
'Cropping pattern' refers to what in agriculture?
Sequence of different crops grown in regular order on specific fields.
'Dead storage volume' in a reservoir primarily accounts for what?
'Lost' water that cannot be utilized from a reservoir.
'Design irrigable area' for an irrigation project depends on what factors?
% arable lands and available water supply.
'Distribution uniformity' in agricultural irrigation systems relates to what aspect?
% difference in water application across an irrigated area.
'Dam height' is defined as the vertical distance between what two points?
'Crest' of the dam and lowest ground line point.
Border irrigation involves water flowing down the slope at varying depths.
False
A dam is constructed to prevent water flow.
False
Conveyance efficiency measures the ratio of water released at the project's headwork to that received at the inlet.
False
Critical depth is the depth of water flow where no backwater forces are involved.
True
Crop coefficient compares the potential evapotranspiration to actual crop evapotranspiration.
False
An algal bloom in water indicates a lack of nutrients.
False
Aquifers transmit water economically for pumping from artificially developed wells.
True
Design irrigable area depends on the projected crop yield only.
False
Dam height is measured from the top of the dam structure to the ground below.
False
Contamination refers to making water more suitable for intended use.
False
Crop water requirements include only evapotranspiration and consumptive use.
False
Bearings in irrigation projects should produce shear failure in the soil.
False
The afflux elevation refers to the rise in the maximum flood level due to the introduction of an obstruction like a dam.
True
An aquifer is a geological formation that contains water and transmits it at a rate insufficient for economic development.
False
Contamination of water involves the introduction of substances that make the water more desirable for intended use.
False
The critical depth in water flow refers to the depth where no other backwater forces are involved.
True
Conveyance efficiency measures the ratio of water released at the project's headwork to that received at the outlet.
False
Crop evapotranspiration rate includes water loss through transpiration and vaporation.
True
A dam's designed height refers to the actual height of the embankment after settlement.
False
Border irrigation involves parallel border strips with uniform water flow depths.
True
A basin irrigation type mainly involves applying water through a gap in the perimeter dike.
True
Crop coefficient compares actual crop evapotranspiration to potential evapotranspiration
True
Confined aquifers are groundwater layers that are not restricted by impermeable materials.
False
Dead storage volume accounts for sediment accumulation over a 10-year period in reservoirs.
False
Test your knowledge on water reservoir terminology and crop evapotranspiration concepts including actual vs predicted rates. Explore terms like afflux elevation and factors affecting evapotranspiration in agriculture.
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