Here is the sixth set of UD Citizen Monitoring Program Reports for 2014 covering the period from July 30 to Aug 15. Temperatures were below normal, and rainfall was above normal, with very heavy rains falling on Aug 2-3.
- Low Dissolved Oxygen readings (< 4.0 ppm) were widespread, but severely low readings (< 2 ppm) were limited to a few dead-end canal systems in the Inland Bays, and Old Mill Creek in the Broadkill watershed.
- Accumulations of Nuisance Aquatic Vegetation were limited. The floating mat of algae in Diamond Pond appeared to have been mostly flushed downstream, but a bed of Hydrilla remained underwater. There was a major accumulation of decaying algae in the water at the Milton tidal pond.
- Total Enterococcus Bacteria (TE) levels were elevated in some canals and tributaries a few daysÂ after the heavy rains, although levels at some sites were below average for the season. Note that some sights were not sampled in this period, so data from the last period is shown.
- In the estuaries, cell densities of the usual marine potentially toxic algae were generally lower with the exception of a bloom of Chloromorum toxicum in South Bethany. High densities of the potentially toxic, fresh water, blue-green algae, Aphanizomenon, were apparently flushed from Red Mill Pond into Old Mill Creek. In the ocean, Karenia papilionacea, Dinophysis acuminata, and Pseudo-nitzchia spp. were consistently present at background cell densities.
As usual, these reports will be archived here. Maps of dissolved oxygen at shoreline sites have been updated, and maps of dissolved oxygen boat transects of the bays will be updated shortly here.