Landlocked Basins

Landlocked basins do not have low level outlets; the only way for water to leave is through evaporation, infiltration, transpiration, and/or pumping. Because there is no outlet structure, landlocked basins are prone to high water levels during wet years and can hold water long after a storm ends.

When making decisions about adding storm sewer outlets to these basins, we must consider downstream impacts and the trade-offs of transferring flood risk. We use 2-dimensional stormwater models to test infrastructure options so that we can understand how flood exposure changes, where the benefits accrue, and where and when options cause impacts.

This map shows landlocked basins and areas that drain to landlocked basins in the neighborhood.