Develop land set aside by creek and claim through adverse possession (Maryland)?

There is a creek behind our row of houses. My land ends before the creek so there is about a 50-75 yards of grassland/trees. Another development was built in the 90's from the other side of the creek. Both developments have the land sloping toward the creek. I was told that no one can build on the land because that land was set aside for storm water runoff control/to protect the creek and that it couldn't be developed- My county's definition of development includes- mowing and cultivating.

Following the rules of adverse possession in my state (20yrs, etc etc) if you were to develop this land would you then be able to claim the land- even if your development (which was a stipulation of Adv. Pos.) was in violation of the original non development because of the creek?

my neighbor seems to think he will be able to claim the land under the homestead act (which is superseded by 1976- didn't tell him but it made me think more in regards to Adv. Pos.)

Since the land was set aside as no development on purpose (where do I find a definitive answer on that?) can you still take it by claiming it and developing it?

I do not think that will work- I think he will try to get the land and get charged for destroying the grassland