Aerated drip irrigation increased the emitter clogging risk of the Yellow River water drip irrigation

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Abstract

Abstract The influence of aeration on the emitter clogging of Yellow River water drip irrigation was evaluated, and reasonable measures to slow down the emitter clogging were investigated. A short‐cycle intermittent irrigation test and sediment settlement test were performed under the conditions of aeration and no aeration. The results showed that aeration accelerated the settlement of sediment at the inlet of the flow channel, increased the clogging rate of the flow channel inlet and exacerbated the clogging of the emitter. With the decrease of sediment particle size, aeration increased sediment deposition and emitter clogging. With the increase fencing inlet area, the effect of aeration on sediment settlement and emitter clogging decreased. Under aeration conditions, the upward position of the emitter outlet significantly reduced the mass of emitter blockage and increased the emitter flow compared with the downward positioning of the outlet. Thus, the recommendation is to select an emitter with a large area of fencing inlet, and the outlet of the emitter should be positioned upwards in order to improve the anticlogging performance of the emitter for Yellow River water aerated drip irrigation.

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