Digging a hole around 6 inches deep for human waste disposal is an appropriate depth primarily because it allows for adequate decomposition and helps prevent contamination of the water table while still being shallow enough to facilitate natural processes. At this depth, microorganisms in the soil can effectively break down waste without overwhelming the organic layer, which is vital for sustaining this process.
Maintaining the depth near the organic layer of soil ensures that the necessary bacteria and other microorganisms, which are crucial for decomposition, are actively engaged without being too deep to function effectively. This balance helps in minimizing any potential environmental impact while promoting proper sanitation practices in wilderness and outdoor settings.
The depth of 6 inches is especially practical in many natural environments, as it is generally manageable for individuals to dig and abide by health and safety guidelines regarding waste disposal.