Non Uniform load on 3D shells. Please help.

Dear all,

I ask for your support on an issue I have with a project I am involved. The seismic excitation can be modeled as effective seismic pressures acting on the shell .The profile of the force is somekind three dimensional as the pressure is not uniform varying with the depth of the elevation we consider, in addition we have to count the degrees deviation from the x-axis. You can find a pic below with a graphical representation of the force. My question is:  How can I model this type of force with non-uniform force in solidworks in a 3D case starting from defining a local reference system on the shell’s inside surface and High Liquid Level.

SolidworksSimulation