Delaware Sea Grant-funded researchers John Callahan, Kevin Brinson and Tina Callahan organized a workshop on Delaware high water marks at the Delaware National Estuarine Research Reserve (DNERR) St. Jones Reserve Training Center in Dover on June 23. The workshop included an update on current progress to catalog, display, and distribute high water mark data collected in Delaware for past flooding events from 1960-present, and discussed plans for regional coordination of pre-storm deployment of water level sensors at temporary monitoring locations for future storms. Callahan, an associate scientist with the Delaware Geological Survey, subsequently shared a similar update on the project with the Delaware State Hazard Mitigation Council at the Delaware Emergency Management Agency’s main offices in Smyrna on June 30 to help assess the impacts from past storms and better prepare for future events.
The Delaware Geological Survey released a new technical report entitled “Groundwater Quality and Monitoring of Rapid Infiltration Basin Systems, Theory and Field Experiments at Cape Henlopen State Park, Delaware” which was prepared by A. Scott Andres and Changming He of the Delaware Geological Survey, Edward Walther of the South Water Management District, Florida, Müserref Türkmen of the Izmir Water and Sewerage Administration, Turkey, and Anastasia Chirnside and William Ritter of the University of Delaware. DGS Bulletin 21C documents the results of a detailed study of groundwater quality at a rapid infiltration basin system.
A rapid infiltration basin system (RIBS) consists of several simple and relatively standard technologies; collection and conveyance of wastewater, treatment, and discharge to an unlined excavated or constructed basin. By design, the effluent quickly infiltrates through the unsaturated or vadose zone to the water table. During infiltration, some contaminants may be treated by biological and/or geochemical processes and diluted by dispersion and diffusion.