huge mesh 400x400


mesh 400x400

hi…
i have fine mesh 400x400, i built this mesh by manual just define the point, connectivity, offset etc
when i saw the result look some problems in my mesh
On the y-axis above 250, my result is not in order as what I am expected, trying to solve it but struggling
how to solve in order of topology

hope anyone could help me

thank you
andy