How to use hexahedral mesh to divide land with small round slopes


how to cut it, so I can use hexahedral mesh to divide land with small round slopes, need your help


this is the model, I mesh it several times,but it's not correct.
It's not so complicated. So share your model?

Here's my test:
Splitting solid by two circles
Splitting more
Make surface mesh
Solid map to get 3D mesh.
HM model:


thanks a lot. Can I use the same method to mesh this?
I cut it like this.
<?xml version="1.0" encoding="UTF-8"?>
<?xml version="1.0" encoding="UTF-8"?>
But some elements have no common nodes.
<?xml version="1.0" encoding="UTF-8"?>


Is this good mesh for you?
It can be calculate.But not so that good.


You know the cause, so try to fix that!
OK,I will fix it. I thought I had cut it in a wrong way. Thanks for your guidance and time. It's very fruitful.
It's not so complicated. So share your model?