| |
MARMARAY Immersed
Tunnel Project
Hydrological
and Meteorological Survey
Project
Overview
DERINSU
provides hydrological and meteorological monitoring services for MARMARAY Tunnel
Project. The monitoring includes acoustic current speed and direction, water
temperature, salinity, water level, wind speed and direction and atmospheric
pressure. |
|
Equipment
in Use
DERINSU
uses a 600 kHz based Recording Doppler Current Profiler for bottom mount
installations.
It
measures:
|
Features
-
Multiple
profile columns
-
Surface
or bottom cell reference
-
Full
range of quality control data
-
Large
storage capacity
-
Real-time
output
-
Windows
based embedded configuration
-
RDCP
Studio data viewer and post-processing software
|
  
Figure
2: Final Checks Before Installation
  
Figure
3: Installation Photos
Figure
4: Sketch of Bottom Mooring and Diving Operation for Mounting the Instrument on Sea Bottom
 |
The ADP (Acoustic Doppler Profiler)
is a high-performance 3D water current profiler that is accurate, reliable,
and easy to use. The ADP
uses state-of-the-art transducers and electronics
designed to reduce side-lobe interference problems that plague other current
profilers.
This allows the ADP to make the very near-boundary
(surface or
bottom) current measurements critical to shallow water applications. |
Features
|
Applications
-
Boat-mounted
with complete positioning, including bottom-tracking and DGPS
interface for transects
-
Real-time
systems for near-shore, port, and harbor monitoring
-
Autonomous
systems complete with batteries and recorder for offshore buoy or
bottom-mounting
|
 |
CTD
is a conductivity, temperature and depth profiler with internal datalogging and battery power. The instrument basically collects high precision
salinity data. Any one or more of the measured parameters, along with the
calculated parameters, which are salinity and sound velocity, can be selected
for output and storage. The time and date on which the parameters are output
and stored can also be recorded for each sample. The instrument can output the
selected parameter data in real time or it can be deployed autonomously under
its own battery power and store the data in its own internal memory for later
retrieval. A Microsoft Windows® based software program enables user to
configure the instrument; acquire, graph and save to a file in real time the
selected parameter data obtained by the instrument during a cast; or download
the data from internal memory after a cast. |
Features
-
Power
requirements: 7–30 VDC @ 85 mA
-
Depth
rating: 500 m standard
-
Sample
rate: 1.83, 2.58, 3.03, 4.08, and 4.50 S/sec, selectable
-
Resolution:
18 bits
-
DC
channels: 8 unipolar, 0–5.0 VDC, 1.22 mV resolution (12 bits)
-
Communication
interface: RS-232 or RS-485
-
Baud
rate: 300, 1200, 9600, and 19,200
-
Data
format: 8 data bits, 1 stop bit
-
Real
time clock stability: ±12 ppm/year
-
Warm
up: 3 seconds after power up
-
Internal
memory: 2 MB
-
Memory
requirements: 2 bytes/channel, 7 bytes for time and date
-
Conductivity
-
Sensor
type: Inductive cell
-
Range:
0–7 S/m (0–70 mS/cm)
-
Accuracy:
±0.0005 S/m (±0.005 mS/cm)
-
Stability:
±0.00005 S/m/month (±0.0005 mS/cm/month)
|
Conductivity
-
Sensor
type: Inductive cell
-
Range:
0–7 S/m (0–70 mS/cm)
-
Accuracy:
±0.0005 S/m (±0.005 mS/cm)
-
Stability:
±0.00005 S/m/month
-
(±0.0005
mS/cm/month)
-
Resolution:
0.00001 S/m (0.0001 mS/cm)
-
Response:
5.0 cm @ 1 m/sec flow
Temperature
Pressure
-
Sensor
type: Precision micro-machined silicon
-
transducer
-
Range:
Customer specified
-
Accuracy:
±0.02% of full scale, higher accuracies
-
available
-
Stability:
±0.01% of full scale/month
-
Resolution:
0.001% of full scale
-
Response:
25 msec
|
- Meteorological
Monitoring System
DERINSU conducts
meteorological surveys for Marmaray Project in order to monitor air pressure,
wind direction
and
speed by use of below equipment and sensors:
 
System
Elements
 |
By
use of Datalogger, a variety of field datalogging applications such as
Automatic Weather Stations, Road Weather Stations, Wind Monitoring Systems
and Water Level Measuring Systems can be performed.
If
connected directly to a PC, or via modem it displays realtime data. |
It
uses monolithic technology enabling the sensor to be produced in very
small size with small hysteresis and a very low rate of ageing.
Ttemperature drifts are also prevented in this design.
Additionally, it is insensitive to mechanical acceleration and can
be operated in any position other than explained application.
The
sensor is waterproof.
|
|
The
Wind Speed Sensor consists of a three cup rotor on top of an aluminum
housing.
The
sensor can be fitted directly onto the sensor arm of Weather
Stations or used separately if a connecting cable is used. The
sensor has 2 output signals; average and maximum wind speed (gust).
Sampling interval is between 4 seconds and 3 hours.
|
|
This
sensor consists of a light wind vane pivoted on top of a housing in
which a compass exists magnetically coupled to the vane. The sensor
can be mounted directly on the Sensor Arm of the Weather Station,
or on different types of sensor brackets and on a 25 mm O.D.
vertical aluminum tube.
The
compass reads out the average reading since the last reading was
taken. 4 Hall elements measure the direction every second and a
micro controller on the electronic card calculates the average direction in
the measuring period.
|
|
Wind
Speed
|
Wind
Direction
|
Air
Pressure
|
Conductivity,
Temperature and Depth
|
|
|
