The number of saddle trenches built in the fields is determined by what factor?

The number of saddle trenches built in the fields is primarily influenced by the size of the unit. This is because the size of the unit directly correlates to the amount of waste and the specific requirements for wastewater management. Larger units often generate more water and sewage, necessitating a greater number of saddle trenches to effectively manage the drainage and ensuring that the water system remains functional and prevents overflow. Therefore, the planning for saddle trenches is a reflection of the operational scale of the unit, making it an essential consideration in the design and implementation of water and fuel systems maintenance.

Other factors such as location, prosperity, and groundwater depth can have roles in the overall systems design, but they do not dictate the quantity of trenches needed as clearly as the size of the unit does.