Dear @huwsnursery. In case you do have to much water and need to divert it, it is reasonable to invest in a one in a lifetime solution by sopling your diversion drains very gently at 1:300 to1:500 and zig-ziging them through your plot with level sill spillways on the direction changes, so that you don't have soil loss through erosion and having to repair them after every bigger rainfall.