Render clipping issues when working at a large scale

I’m working at large scales due to working with geographic coordinates and I’m having issues with clipping. In the image you see weird artifacts where the water plane is intersecting with the heightmap of the landscape. I need these to intersect because I’m letting the water plane rise during animation. At smaller zoom scales I managed to solve these artifacts by kind of randomly tweaking the start and end clip distances, at this scale however I’m unable to solve it.

The dimensions of the plane are 109826.117, 71686.352, 50.000

Anyone have any tips as to what is going on and how to solve it?