What do contour lines represent in site plans?

Contour lines on site plans are utilized to indicate the elevation and slope of the terrain. These lines connect points of equal elevation, which helps in visualizing the topography of the land. Understanding the elevation changes is crucial in various aspects of site planning, including site drainage, landscape design, and construction planning. The spacing of the contour lines also provides insight into the steepness of slopes; closer lines suggest a steeper incline, while wider spacing indicates a gentler slope. This information enables architects, engineers, and planners to make informed decisions regarding grading, water runoff, and the overall usability of the land. Other choices do address important aspects of site planning, but they do not relate specifically to the role of contour lines, which are primarily focused on conveying information about the elevation and slope of the landscape.