Water Reservoirs and Evapotranspiration Quiz
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Questions and Answers

What is the main difference between a confined aquifer and an unconfined aquifer?

  • A confined aquifer has impermeable layers above and below it, while an unconfined aquifer does not.
  • A confined aquifer contains saltwater, while an unconfined aquifer contains freshwater.
  • The groundwater in a confined aquifer is under pressure, while in an unconfined aquifer it is not. (correct)
  • A confined aquifer is deeper underground than an unconfined aquifer.

    • What does the term 'critical depth' refer to in the context of water flow?

  • The depth at which water flow velocity exceeds a specific threshold.
  • The depth at which water flow is at its maximum capacity.
  • The depth at which water flow causes erosion.
  • The depth at which no other backwater forces are involved in the flow. (correct)

    • What factor affects the application efficiency of irrigation?

  • The amount of water stored in the reservoir.
  • The salinity of the soil. (correct)
  • The type of crops being irrigated.
  • The size of the irrigation field.

    • What defines the term 'crop coefficient' in agriculture?

    <p>The ratio of actual crop evapotranspiration to potential evapotranspiration.</p> Signup and view all the answers

    What does 'algal bloom' in water indicate?

    <p>Overgrowth of algae producing dangerous toxins in water.</p> Signup and view all the answers

    What does 'conveyance efficiency' measure in an irrigation project?

    <p>The ratio of water received at the inlet to water released at the project's headwork.</p> Signup and view all the answers

    'Border irrigation' involves directing water flow down slopes along what?

    <p>Parallel border strips.</p> Signup and view all the answers

    'Cropping pattern' refers to what in agriculture?

    <p>Sequence of different crops grown in regular order on specific fields.</p> Signup and view all the answers

    'Dead storage volume' in a reservoir primarily accounts for what?

    <p>'Lost' water that cannot be utilized from a reservoir.</p> Signup and view all the answers

    'Design irrigable area' for an irrigation project depends on what factors?

    <p>% arable lands and available water supply.</p> Signup and view all the answers

    'Distribution uniformity' in agricultural irrigation systems relates to what aspect?

    <p>% difference in water application across an irrigated area.</p> Signup and view all the answers

    'Dam height' is defined as the vertical distance between what two points?

    <p>'Crest' of the dam and lowest ground line point.</p> Signup and view all the answers

    Border irrigation involves water flowing down the slope at varying depths.

    <p>False</p> Signup and view all the answers

    A dam is constructed to prevent water flow.

    <p>False</p> Signup and view all the answers

    Conveyance efficiency measures the ratio of water released at the project's headwork to that received at the inlet.

    <p>False</p> Signup and view all the answers

    Critical depth is the depth of water flow where no backwater forces are involved.

    <p>True</p> Signup and view all the answers

    Crop coefficient compares the potential evapotranspiration to actual crop evapotranspiration.

    <p>False</p> Signup and view all the answers

    An algal bloom in water indicates a lack of nutrients.

    <p>False</p> Signup and view all the answers

    Aquifers transmit water economically for pumping from artificially developed wells.

    <p>True</p> Signup and view all the answers

    Design irrigable area depends on the projected crop yield only.

    <p>False</p> Signup and view all the answers

    Dam height is measured from the top of the dam structure to the ground below.

    <p>False</p> Signup and view all the answers

    Contamination refers to making water more suitable for intended use.

    <p>False</p> Signup and view all the answers

    Crop water requirements include only evapotranspiration and consumptive use.

    <p>False</p> Signup and view all the answers

    Bearings in irrigation projects should produce shear failure in the soil.

    <p>False</p> Signup and view all the answers

    The afflux elevation refers to the rise in the maximum flood level due to the introduction of an obstruction like a dam.

    <p>True</p> Signup and view all the answers

    An aquifer is a geological formation that contains water and transmits it at a rate insufficient for economic development.

    <p>False</p> Signup and view all the answers

    Contamination of water involves the introduction of substances that make the water more desirable for intended use.

    <p>False</p> Signup and view all the answers

    The critical depth in water flow refers to the depth where no other backwater forces are involved.

    <p>True</p> Signup and view all the answers

    Conveyance efficiency measures the ratio of water released at the project's headwork to that received at the outlet.

    <p>False</p> Signup and view all the answers

    Crop evapotranspiration rate includes water loss through transpiration and vaporation.

    <p>True</p> Signup and view all the answers

    A dam's designed height refers to the actual height of the embankment after settlement.

    <p>False</p> Signup and view all the answers

    Border irrigation involves parallel border strips with uniform water flow depths.

    <p>True</p> Signup and view all the answers

    A basin irrigation type mainly involves applying water through a gap in the perimeter dike.

    <p>True</p> Signup and view all the answers

    Crop coefficient compares actual crop evapotranspiration to potential evapotranspiration

    <p>True</p> Signup and view all the answers

    Confined aquifers are groundwater layers that are not restricted by impermeable materials.

    <p>False</p> Signup and view all the answers

    Dead storage volume accounts for sediment accumulation over a 10-year period in reservoirs.

    <p>False</p> Signup and view all the answers

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