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What is the primary purpose of the physical system in surface irrigation?
What is the primary purpose of the physical system in surface irrigation?
- To control surface roughness
- To supply water for urban consumption
- To supply water for crop production (correct)
- To facilitate overland flow of water
Which factor largely influences the advance rate of water in surface irrigation?
Which factor largely influences the advance rate of water in surface irrigation?
- The temperature of the water
- The field slope
- The wind speed at the field
- The geometry or shape of the flow cross-section (correct)
What is the cumulative time since the initiation of irrigation until the inflow is terminated known as?
What is the cumulative time since the initiation of irrigation until the inflow is terminated known as?
- Recession phase
- Ponding phase
- Cut off time (tco) (correct)
- Depletion phase
Which phase of the surface irrigation process involves the practice of using a high unit discharge during the advance phase and a reduced one during the wetting or ponding phase to control runoff?
Which phase of the surface irrigation process involves the practice of using a high unit discharge during the advance phase and a reduced one during the wetting or ponding phase to control runoff?
What does 'surface irrigation' refer to?
What does 'surface irrigation' refer to?
Which phase of the surface irrigation process involves the cumulative time since the initiation of irrigation until the inflow is terminated?
Which phase of the surface irrigation process involves the cumulative time since the initiation of irrigation until the inflow is terminated?
What is the term for the practice of using a high unit discharge during the advance phase and a reduced one during the wetting or ponding phase to control runoff in surface irrigation?
What is the term for the practice of using a high unit discharge during the advance phase and a reduced one during the wetting or ponding phase to control runoff in surface irrigation?
What is the primary purpose of the physical system in surface irrigation?
What is the primary purpose of the physical system in surface irrigation?
What largely influences the advance rate of water in surface irrigation?
What largely influences the advance rate of water in surface irrigation?
What does 'surface irrigation' refer to?
What does 'surface irrigation' refer to?
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Study Notes
Surface Irrigation Process
- The primary purpose of the physical system in surface irrigation is to distribute water over the land to achieve a desired moisture distribution.
Factors Influencing Advance Rate
- The advance rate of water in surface irrigation is largely influenced by the factor of infiltration.
Key Terms and Phases
- Basin Irrigation: The cumulative time since the initiation of irrigation until the inflow is terminated is known as basin irrigation.
- Cutback: The practice of using a high unit discharge during the advance phase and a reduced one during the wetting or ponding phase to control runoff is known as cutback.
Definition of Surface Irrigation
- Surface irrigation refers to the application of water to the soil surface, where it flows over the land and infiltrates into the soil.
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