roof on field lines to protect it from heavy recent rains in atl

[Gp G.]

Due to heavy rains in Atlanta septic field lines are becoming wet and not peculating water any more. Is there is a way i can put some cheap roof(asbestos or plastic shed etc.

https://www.google.com/search?safe=active&rlz=1C1CHZL_enUS736US736&sxsrf=ALeKk02Eeqyrv3nkLf9pFsWsqXTjKuwa4A:1582656290329&q=asbestos+shed&tbm=isch&source=univ&sa=X&ved=2ahUKEwio9vGPru3nAhXBm-AKHeFxAA0Q7Al6BAgIEDk&biw=1366&bih=657

) on top of field lines in my backyard so that rain water does not fall on the field lines.  Do I need city or county permission for this type of shed in back yard. Please advise

Thanks in advance