True or False: Effluent from an upslope trench must flow to the downslope trench in a serial distribution system.

In a serial distribution system, effluent from an upslope trench flows to the downslope trench. This is a fundamental characteristic of such systems, which are designed to effectively manage the treatment and distribution of wastewater. The flow from one trench to another allows for an organized method of dispersing the effluent in a manner that promotes adequate treatment and prevents system overloads.

The design aims to ensure that the effluent is treated as it moves through the sequential trenches, where soil and microbial activity further break down contaminants. In this configuration, gravity plays a significant role in guiding the flow of effluent downhill from one trench to the next, aligning with the principles of natural drainage and soil absorption.

Considering this, stating that effluent from an upslope trench must flow to the downslope trench is indeed true, reflecting the necessary functioning of a serial distribution system in managing wastewater effectively.