How are the trench widths determined for mound systems?

Trench widths for mound systems are determined primarily by considering soil permeability and the design flow rates. This approach ensures that the system can adequately handle the expected volume of wastewater and allows for proper absorption into the surrounding soil. The permeability of the soil influences how quickly water can infiltrate, which in turn affects how wide the trenches need to be to maintain effective treatment and prevent over-saturation or pooling of effluent.

Inadequate trench widths could lead to inadequate drainage and potential system failure, which is why understanding the relationship between soil characteristics and flow rates is essential in the design process. The use of permeability and flow rates allows for a tailored design that meets the specific site conditions and wastewater loading requirements.