There are many lands across the globe that are situated on areas not close to the water, I believe LandDao would focus on those areas for a start, it's not like they might not decide to consider lands to the a river or so but for a start they'll consider the cost of sandfilling swampy areas and focus on other lands that doesn't need sandfilling.
Whether a land is situated close to the river or it's a water filled area like swamp, all these landsmust have an essential purposes that will be suitable for them. LandDAO have already specified in their white paper that they are going to tokenize lands for agricultural purposes and also residential areas so that investors can have lot of options to consider. This project could expose traders tona redefined real world asset community that tokenized real lands as a form of ownership.