Ridges and hills that separate two watersheds are called the drainage divide.
Surface water catch basin.
The word watershed is sometimes used interchangeably with drainage basin or catchment.
The watershed consists of surface water lakes streams reservoirs and wetlands and all the underlying groundwater.
County road crews keep outfalls flowing culverts draining catch basins catching and surface water managed.
Unless constructed with permeable bottoms to let water infiltrate into underlying soil this subterranean basin can become a mosquito breeding area because it is cool dark and retains.
Larger watersheds contain many smaller watersheds.
Diversified drainage can create a drainage system that directs storm water and surface water runoff into catch basins also known as a storm drain or curb inlet and discharge it into the municipal storm water system or natural wetlands through.
It usually consists of surface drain that leads to an enlarged box beneath that is then tied to an underground drainage system that finally leads to downspout drains or storm sewers.
It stands to reason that if you want to remove surface water you remove the water at the surface and not wait for it to saturate the ground.
Island county owns and maintains over 3700 culverts and over 1700 catch basins nearly all associated with county roads.
Additionally the county manages drainage easements across hundreds of properties.