What angle of slope requires a special engineering study according to environmental standards?

The angle of slope that requires a special engineering study, according to environmental standards, is 8 percent. This is significant because an 8 percent slope translates roughly to a 4.6-degree angle. Slopes at this gradient can lead to increased erosion, runoff issues, and potential instability of the land, which is why they necessitate a more thorough analysis.

In environmental engineering and land use planning, slopes exceeding 8 percent are often viewed with caution. This threshold triggers the need for engineering studies to assess potential impacts on soil stability, vegetation, and the hydrology of the area. These studies aim to ensure that any construction or land alteration does not adversely affect the environment or cause safety hazards.

In contrast, other angles provided, while they may involve considerations for construction and land use, do not trigger the same level of scrutiny or specific engineering study requirements under environmental standards. Understanding the implications of slope gradients allows environmental health specialists to make informed decisions regarding land use and resource management.