FDEP Temporal
Variability (Trend) Network
The basic
design units of the Temporal Variability (TV), or trend, monitoring network are
the state of Florida’s 52 United States Geologic Survey (USGS) eight-digit
surface water drainage basins.
The purposes of the TV network are to correlate Tier I, II, and III IWRM results
with seasonal climatic change (i.e., is sampling occurring during wet or dry
hydrologic condition?), to make best estimates of temporal variance of sampled
analytes within the USGS drainage basins, and to determine how these analytes
are changing over time. It is managed by the Watershed Monitoring Section of
DEP, which also manages the Status Network. The TV Network is subdivided into
surface water (SWTV) and ground water (GWTV) networks.
In both the SWTV and GWTV Networks, field analytes (pH, dissolved oxygen,
specific conductance, and temperature) are sampled on all site visits. In
addition, laboratory analytes such as Total Organic Carbon (TOC), chlorophyll,
bacteria, nutrients, metals, total dissolved solids (TDS), color, turbidity, and
alkalinity are collected monthly during SWTV site visits, and quarterly at GWTV
sites.
Surface
Water TV (SWTV) Network
The SWTV Network consists of 75 fixed location sites in streams and
rivers that are sampled on a monthly basis. The sites are usually
located at the lower end of a USGS drainage basin and are placed at or
close to a flow gauging station. These sites enable FDEP to obtain
chemistry, discharge, and loading data at the point that integrates the
land use activities of the watershed. In addition, some SWTV sites are
located at or near the Florida State boundary with Alabama and Georgia.
These stations are used to obtain chemistry and loading data for major
streams entering Florida.
SWTV sites are not designed to monitor point sources of pollution
since TV sites are located away from known outfalls or other regulated
point source inputs. The SWTV sites are sampled by personnel working for
the FDEP, the water management districts (WMDs), and county agencies.
All samples are analyzed in the FDEP Central Laboratory. Each site is
sampled on a monthly basis for physical, chemical and biological
analytes.
- Statewide SWTV data is available via the Department’s STORET
Web site (http://storet.dep.state.fl.us/)
using STORET org. ID 21FLGW. For further information, call us at
(850)245-8505.
Ground Water TV (GWTV) Network
The GWTV
consists of 46 fixed location sites (24 unconfined aquifer wells, 21 confined
aquifer wells, and one spring vent site). These sites were located so that each USGS drainage basin had a representative site for both the confined and
unconfined aquifer systems when both of these systems were present within the
drainage basin.
As with the SWTV Network, GWTV sites are sampled by personnel working for FDEP,
the WMDs, and county agencies, with all samples analyzed in the FDEP Central
Laboratory. Since the temporal variance of water chemistry in confined aquifers
is much less than that of unconfined aquifers, field analytes at confined sites
are sampled quarterly and unconfined ground water resources are sampled monthly.
Laboratory analytes at both confined and unconfined aquifers are sampled
quarterly.
We are grateful to the
citizens, county and city governments, and regulated facilities that provide us
access to sample for regional and statewide water quality.
2010 State of Florida