Which irrigation method is most likely to result in significant water loss due to evaporation and runoff?

Which irrigation method is most likely to result in significant water loss due to evaporation and runoff?

• A. Drip
• B. Center-pivot
• C. Sprinkler
• D. Flood

Answer: (D)

Irrigation efficiency hinges on how much water stays in the root zone versus being lost from the field surface through evaporation or runoff. Flood irrigation floods the entire field with standing water, creating a large surface exposed to sun and wind. Water is often applied faster than the soil can absorb it, especially on certain soils or slopes, so a substantial amount sits on the surface, evaporates, or runs off the field edges. This combination leads to large losses before the water can infiltrate to plant roots. Other methods deliver water more directly to the root zone or apply it more evenly with less surface ponding, which minimizes evaporation and runoff. So flood irrigation is the one most likely to incur significant water loss due to evaporation and runoff.

Irrigation efficiency hinges on how much water stays in the root zone versus being lost from the field surface through evaporation or runoff. Flood irrigation floods the entire field with standing water, creating a large surface exposed to sun and wind. Water is often applied faster than the soil can absorb it, especially on certain soils or slopes, so a substantial amount sits on the surface, evaporates, or runs off the field edges. This combination leads to large losses before the water can infiltrate to plant roots. Other methods deliver water more directly to the root zone or apply it more evenly with less surface ponding, which minimizes evaporation and runoff. So flood irrigation is the one most likely to incur significant water loss due to evaporation and runoff.