Unit 2: Introduction to Irrigation and Drainage Principles
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Questions and Answers

What determines the extent of the total service area of national irrigation systems?

  • Crop water requirements
  • Soil texture
  • Canal capacity (correct)
  • Leaching requirements
  • What is the process by which water vapor escapes from living plants?

  • Canal capacity
  • Leaching
  • Evapotranspiration
  • Transpiration (correct)
  • Which factor improves soil structure and soil productivity?

  • Soil texture
  • Leaching requirements (LR)
  • Crop water requirements (CWR)
  • Drainage (correct)
  • What increases water infiltration into soils and favors the growth of soil bacteria?

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

    What fraction of irrigation water must be leached through the root zone to control soil salinity at a specified level?

    <p>Leaching requirements (LR)</p> Signup and view all the answers

    What is an example of a satellite-based instrument used for remote sensing to gather data on river discharge and water levels?

    <p>Radar altimeters</p> Signup and view all the answers

    What is the sum of transpiration and water evaporated from the soil or exterior parts of plants?

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

    In the context of the text, what is NOT considered essential after accurately measuring flowing water?

    <p>Object modeling</p> Signup and view all the answers

    Which of the following techniques is highlighted in the text as crucial for analyzing flow data and generating meaningful reports?

    <p>Data visualization techniques</p> Signup and view all the answers

    Who created the presentation template mentioned in the text?

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

    Which of the following is NOT a discussant mentioned in the text?

    <p>John Smith</p> Signup and view all the answers

    Why is moisture measurement important in irrigated soil?

    <p>To optimize water use and irrigation scheduling</p> Signup and view all the answers

    Which method of moisture measurement involves measuring the change in dielectric constant between two conducting plates buried in the soil?

    <p>Capacitance Sensors</p> Signup and view all the answers

    What is the primary advantage of moisture measurement in terms of water management?

    <p>Optimal irrigation scheduling</p> Signup and view all the answers

    What does Irrigation Diversion Requirement (IDR) refer to?

    <p>Replenishing lost water during diversion</p> Signup and view all the answers

    Which device measures soil moisture by injecting a neutron source into the soil?

    <p>Neutron Moisture Gauges</p> Signup and view all the answers

    How do Capacitance Sensors measure soil moisture?

    <p>By sensing the change in dielectric constant between two conducting plates buried in the soil</p> Signup and view all the answers

    What is the main objective of understanding farm irrigation and drainage?

    <p>To create favorable conditions for plant growth</p> Signup and view all the answers

    How is irrigation generally defined?

    <p>Application of water to soil for plant growth</p> Signup and view all the answers

    What is precipitation in meteorological terms?

    <p>Product of atmospheric water vapor condensation that falls from clouds</p> Signup and view all the answers

    How does atmospheric water, other than precipitation, reduce plant water needs?

    <p>By reducing forces causing water transpiration</p> Signup and view all the answers

    What is the purpose of flood water in relation to plants?

    <p>To absorb water for subsequent use by plants</p> Signup and view all the answers

    How does drainage contribute to crop growth?

    <p>By reducing soil moisture content</p> Signup and view all the answers

    Why is planning and implementing water-saving practices during nondrought periods important?

    <p>To contribute to increased resilience during dry spells.</p> Signup and view all the answers

    What is the primary purpose of addressing water distribution equity among different users?

    <p>To ensure fair allocation of water resources.</p> Signup and view all the answers

    Which type of irrigation channel is most commonly excavated in natural material without artificial lining?

    <p>Earth canal</p> Signup and view all the answers

    Why should irrigation channels be stable according to the text?

    <p>To eliminate sediment deposition.</p> Signup and view all the answers

    What is the main consequence of low velocities in irrigation channels according to the text?

    <p>Greater sediment deposition</p> Signup and view all the answers

    Why are water-saving practices important for increasing resilience during dry spells?

    <p>To conserve water resources for times of scarcity.</p> Signup and view all the answers

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