Caribbean-Florida Water Science Center
Models of the Transport of Deep-Well Injectate at the North District Wastewater Treatment Plant, Miami-Dade County, Florida
Project Chief: Jeffrey N. King
Figure 1. North District Wastewater Treatment Plant, Miami-Dade County, Florida; injection wells IW-1, IW-2, IW-3, and IW-4; Floridan aquifer monitoring wells FA-1, FA-2, FA-3, and FA-4
The Florida Legislature found that "elimination of ocean outfalls as a primary means of domestic wastewater discharge are in the public interest." In response to regulatory requirements associated with this finding, the Miami-Dade Water and Sewer Department (MDWASD) is transitioning the primary means of treated, domestic wastewater discharge at the North District Wastewater Treatment Plant (NDWWTP) (fig. 1) from the existing ocean outfall to reuse and deep-well injection. The NDWWTP is in Miami-Dade County, Florida, near the City of North Miami Beach.
Figure 2. Counter-clockwise from upper left: Location map in the x-y plane for hydrogeologic sections A-A’ and B-B’ at the North District Wastewater Treatment Plant, Miami-Dade County, Florida. Axes are distance in meters from the origin of the Albers conical equal area projection. Location map is oriented 90 degrees clockwise, such that north is oriented to the right, along the y-axis. Vertical, south-north oriented section A-A’ in the y-z plane. Vertical, west-east oriented section B-B’ in the x-z plane. Hydrogeologic units are shown as horizontal colored regions, where the light blue unit labeled UFA is the Upper Floridan aquifer, the light green unit labeled APPZ is the Avon Park permeable zone, and the dark orange unit labeled BZ is the Boulder zone. Vertical sections show injection well cased intervals as vertical black lines, injection well open interval as vertical red lines, Floridan aquifer monitoring well cased intervals as vertical grey lines, and Floridan aquifer monitoring well open intervals as vertical red lines. Position within each section is expressed as elevation in meters relative to NGVD 1929, versus distance in meters from the origin of the Albers conical equal area projection.
The major objective of this project is to characterize flow paths that permit effluent to be transported from the Boulder zone (injection zone) to the Avon Park permeable zone (lower monitoring zone).
Study objectives are met by building models that show how effluent can be transported from the Boulder zone (injection zone) to the overlying Avon Park permeable zone (lower monitoring zone).
Not yet available.
A U.S. Geological Survey Scientific Investigations Report will describe project results.