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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.

To quantitatively evaluate the anti-clogging performance of labyrinth channel emitters, literary data were used to study the clogging of different emitters under different conditions. The results showed that the emitter clogging comprehensive evaluation index (I a ) can be used as an inherent property of labyrinth flow channel emitters, denoted as the anti-clogging ability characterization index, which is affected by flow channel structure parameters and dimensions. The larger I a is, the more likely it is for the emitter to be clogged and for clogging to be more serious. The emitter anti-clogging ability is affected by the emitter discharge (Q), flow path length (L), width (W), depth (D), crosssectional area (A, which equals W Â D), minimum sectional size (min(D, W)), etc. The I a value with Q, W, D, A and min(D, W) increases first decreases and then increases, and with L increases first increases and then decreasing, and a critical threshold range exists. I a can be estimated by Q, W, D, A and min(D, W) and can be used as an effective indicator to quickly estimate emitter anticlogging ability and emitter configuration in drip irrigation systems. In practical applications, an emitter with x < 0.47 (flow index) should be selected, and an emitter with I a < 0.45 has a better hydraulic performance and anti-clogging ability. To obtain a better anti-clogging ability, Q, W, D, A and min(D, W) should be 1.33-2.13 L/h, 0.71-0.90 mm, 0.55-0.71 mm, 0.33-0.68 mm 2 and 0.60-0.75 mm, respectively. When L is 26.47-58.31 mm, the emitter anticlogging ability is relatively low. K E Y W O R D S anti-clogging ability, characteristic parameters, evaluate, influencing factors, labyrinth channel emitter Résumé Pour évaluer quantitativement la performance anti-colmatante des buses individuelles à canal labyrinthe, des données littéraires ont été utilisées pour étudier le colmatage de différentes buses individuelles dans différentes conditions. Les résultats ont montré que l'indice d'évaluation globale du colmatage Article title in French: Facteurs d'influence et methodes de caracterisation de la capacite anti-colmatante des buses individuelles a canal labyrinthe.