In much of the region, the sewage networks are combined with the overflow systems for storm water.

The chief culprit is the combined sewage overflow system.

The city has attempted to recreate the natural shoreline in some areas and is working to phase out the antiquated sewer overflow system.

Water quality is further reduced by the use of combined sewer overflow systems, in which storm water and raw sewage share pipes.

Every year, after heavy rains, it receives an astounding 2.7 billion gallons of raw sewage from the city's combined sewer overflow system.

(Both Trump and the city say the odor might be caused by the river, the storm overflow system or geese droppings.)

Furthermore, the storm overflow system may well operate if the sewers are overloaded, discharging some of their contents directly into the rivers.

Overflow systems make use of alternative routing circuit groups or paths to transfer excess traffic and thereby reduce the possibility of congestion.

Alternatively, overflow systems make use of alternative routes to divert calls via different paths - even these systems have a finite traffic carrying capacity.

The aeries have their catchment areas, inward-sloping skins on all levels, channelling rain water into great barrels with overflow systems into other barrels.

Seven of the lakes have been incorporated in an artificially regulated overflow system providing both for flood mitigation and as storage for domestic use, livestock and irrigation downstream.

But not this month, when the overflow system discharged enough waste to create the huge garbage slick, which was not detected until it reached the shore in northern Monmouth County.

The cause of the burst was not clear however it was likely that no overflow system was provided and a summer storm caused the dam to overtop and erode the earth embankment.

Factors working against the further return of wildlife include residual industrial contaminants, spillage from the sewer overflow system into the creek, and the seawall that constrains much of the shoreline with little habitat value.