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Mixing Zones (n):
1. Mixing zones are
limited regions in
rivers, lakes and coastal
areas where the initial
dilution (dispersion) of
point-source
wastewater discharges
occur


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CORMIX
Licensing

Consulting

Technical
Support

Mixing Zone
Field Studies


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CTD
 Conductivity, Temperature, Depth
 Used to find plumes

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ADCP
 Acoustic Doppler Current Profiler
 Uses sonar to determine water
velocities

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DGPS
 Differential Global Positioning
System
 Provides sub-meter location data

Source:
rdinstruments


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Differential GPS

Location ±15m from
satellites

Station
broadcasts offset between
known coordinates and satellite
coordinates.

Illustration: Nathan Hinkle


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Forward Looking InfraRed
Uses infrared to measure spot temperatures

Source: mixzon.com


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FLIR system on a telescoping mast

FLIR system on a tethered balloon


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Commercial
Processing
Software

Internally
developed
software

Photos: mixzon.com


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Riverboat
Sensors

WiFi
Bridge

WiFi Access
Point

Laptop

GPS

Commercial
processing
tools

Source: mixzon.com

Internally
developed
processing
tools


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CTD = Conductivity,
Temperature, Depth
sensor
Used to find plumes
and determine mixing
zones
Data collected as text
files
Photo: mixzon.com


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Sensor is dropped in
 Downcast

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…then pulled up
 Upcast

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We only want upcast
data
We only want the data
points for the maximum
values


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Data saved as raw text
Interns and employees
manually find upcast
Maximum values
manually found
 Slow, inefficient


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Designed an algorithm
Wrote an application to
implement algorithm
Used C++/CLI
programming language


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Output as smaller text
files
Output to GIS shapefile
 GPS coordinates make
points
 Attribute data attached
to coordinate points
 Maps can be created
from these points


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User can select
multiple files

Output is shown
while processing

Maximum values
are shown with lines
and in text

Status strip shows
sensor information

Graph is shown for each
of the measurements

User can select which
file’s graph to look at


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Helped with field data
collection


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Redesigned MixZon’s intranet site
 New UI
 Platform-independent, w3c-compliant code
 Used PHP, HTML, CSS


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Microsoft C++/CLI
 New programming language

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Mixing zone terminology
Understanding of GPS/GIS
Environmental science in the field
Experiencing a professional work situation


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Other interns’ sections of the ppt have been
redacted


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Thank you to all of the people who made our
internships such a great experience:
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Dr. Robert Doneker – MixZon’s President
Our mentors
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Adi Ramachandran
Dr. Todd Sanders
Frank Opila
Kent Thompson
Thomas “Legacy” Lovett

The ASE staff