A Beginner's Guide to ASCE 705 Chapter 4  H: Soil Loads & Hydrostatic Pressure © 2007, T. Bartlett Quimby 

Section 4.1 Pressure Computations Last Revised: 11/04/2014 Loads computed from soil and/or hydrostatic pressure are designated as "H" in the load combination equations. ASCE 705 3.2 treats both lateral soil loads and hydrostatic pressure similarly. Both increase linearly with depth according to the equation lateral pressure at h = g h Where:
For water, you must also consider the upward buoyancy force, g_{w} h_{wmax}, as well (see ASCE 705 3.2.2). Figure 4.1.1 illustrates the application of the loads. Figure 4.1.1 