flooding rate
4.Pilot experiment of removing COD Cr in water in Guanting Reservoir by aeolian sand system was carried out. The result shows that, when the hydraulic loading rate is 1.0~1.5 m/d and flooding drying ratio is 12 hrs∶12 hrs, the average removal rate of COD Cr is 61%, and the COD Cr concentration becomes less than 15 mg/L which satisfies the quality standard GHZB1 1999 for surface drinking water.
5.For the heterogeneous models under confined pressure 2 MPa higher than that in the system, the ratio of flow rate in higher and lower zones is in range 3.00—3.17 in water flooding phase, decrease to 1.44—1.67 in 1.0% LH-1 solution+N_2 injection phase and increases to 2.08—2.23 in successive water flooding phase;

