Description: This layer depicts the generalized topographic slope for the continental US. Data highlights where topographic relief maybe limiting for siting locations of UFD. Topography and topographic relief (represented here as smoothed slope) is a siting consideration for several reasons. Steep topography is a primary indicator of recent uplift and tectonism, high erosion rates, and increased landslide hazard from steep slopes (e.g., Montgomery and Brandon, 2002), Topography also exerts a primary control on hydraulic flow and groundwater recharge and discharge.
Description: Continental US map of derived geophysical subsurface aeromagnetic response. Data displays the magnetic response of subsurface geological structure. In particular, this data is believed to depict the basement structure in the earth continental crust.