I have 60 rural acres in arizona that is to be developed into a RV park. Site is table flat. Parcel is surrounded by two lane roads with no where to route storm run-off, so it will have to be handled on-site. The town has said they would allow retention ponds, but I don't want to create mosquito breeding ponds. The new train of thought for storm water control is not just to create impervious conveyance channels to a detention pond, but to create pervious conveyance channels that help the run-off to infiltrate back into the ground as it is going to a detention pond, thereby reducing the volume of run-off needed to be contained. This development is a P.A.D. requiring 25% of land to be allocated for open space, so I will have areas where I could create grass covered park or play areas. I thought I could put gentle swales through these areas with sand or porous rock beds to collect the storm run-off and infiltrate back into the ground. I am concerned of clogging that might happen on the top of the sand or rock bed. Any thoughts or comments on similar projects?