In furrow irrigation, surge irrigation serves what purpose?

• A. Intermittent application of water in furrow irrigation for the purpose of improving down furrow efficiency and reducing deep percolation
• B. Continuous flood irrigation for maximum coverage
• C. Increasing water temperature
• D. Eliminating deep percolation entirely

Answer: (A)

Surge irrigation in furrow systems uses intermittent water application—delivering water in short bursts rather than a continuous flow. This pacing lets the soil absorb water during each burst and then pause, which helps the wetting front advance more efficiently along the furrow and reduces water bypass deep into the profile. As a result, more water infiltrates into the root zone and less is lost to deep percolation, improving down furrow efficiency. It can also cut runoff and tailwater by preventing over-saturation during a single long flow. It doesn’t raise water temperature, and while it reduces deep percolation, it doesn’t eliminate it entirely.