In the light of a practical example, this article points out the existing problems with the design standards of horizontal flow type grit chamber, and discusses the factors affecting the grit deposit.

Establish the transient flow model of the horizontal well for the uniform flux and infinite conductivity wellbore type.

The intake with inclined culvert horizontal-tube is only suitable for reservoirs with relatively small intake depth and flow, but the shaft type is applicable to deep reservoir with big intake flow.