About Us

„Baltijas jūras ģeoloģijas centrs” (BJGC) is a fast growing company that unites intellectual capabilities of Riga Technical University, design firm “L4” and hydro-technical construction experience of “BGS” Ltd.    BJGC is fitted with the large amount of scientific measurement equipment, software and a laboratory to provide the solutions to the most complex problems in engineering design and ecological research within the water based environment. We also provide the cartography services and underwater object detection and search (pipelines, wreckage etc.).  Our company has several employees that specialize in hydrography, geology and geophysics.

Areas of activity

The company’s main operational and research directions

  • Marine geological studies
  • Geomorphological process and coast erosion process studies
  • Underwater current measurements
  • Hydrological data gathering and analysis for further numerical modelling (sediment transport, accretion and erosion)
  • Bathymetric research
  • Chute, pipeline and other object detection underwater
  • Underwater works and port water area research using ROV
  • Field sample gathering, express-analysis and laboratory research
  • Environmental Project execution

Multi-purpose geotechnical rig

LX ™ 6 manufactured by Boart Longyear is a compact multi-purpose geotechnical rig capable of wireline and conventional coring, as well as DTH, rotary and auger drilling methods. Equipped with automatic SPT hammer for testing and sampling.

The rig is equipped with powerfull steel crawlers, 220 mm double clamp and 1000 mm mast dump for improved positioning on rough terrain.

drilling rig

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SyQwest Stratabox Sub-bottom profiler

Measuring equipment complex based on the StrataBox Sub-bottom Profiler that allows  to detect and measure the thickness of dredged material deposits, detect hard substrate that has been covered by sedimentation, identify buried objects (such as cables and pipelines), and define the basement (or bedrock) layer for potential confined aquatic disposal sites for dredged material. This high-resolution marine sediment-imaging instrument is capable of delivering 6 cm of marine sediment strata resolution with bottom penetration of up to 40 meters in water depths of up 150 meters.

Thesystemconsistsof:

  • StrataBox Sub-bottom Profiler manufactured by “Sy-Qwest”
  • GPS system, “TRIMBLE” Geo Explorer PRO

Features

  • Strata Resolution: 6 cm with up to 40 meters bottom penetration.
  • Depth Accuracy: ± 0.5%
  • Geographic Position Input, NMEA Compatible
  • Data Storage and Playback
  • Zoom Modes
  • Event Marks
  • Portable or Bulkhead  Installation

strata1

 

 

EdgeTech 3100 Sub-bottom profilers

The EdgeTech 3100 Portable Sub-Bottom Profiling System is a towed portable sub-bottom profiler system. It uses Full Spectrum (“chirp”) pulses to create high definition image slices of sub-bottom structure below the bottom. The equipment is suited for use in rivers, lakes, ponds, and other waterareas.

The system comes with a choice of two towfish: either the SB-424 or SB-216S. These towfish operate at different frequency ranges and selection between the two depends on the type of application.

The 424 operates at 4-24 kHz and will provide slightly higher resolution but less penetration.

The 216S operates at 2-16 kHz and provides slightly less resolution but greater penetration.

Application:

  • Geo-technicalsurveys
  • Hazardsurveys
  • Environmentalsite investigations
  • Geological studies
  • Buried object location
  • Sediment classification
  • Search and recovery
  • Locate and map buried pipelines and cables
  • Mining and dredging surveys
  • Bridge and shoreline scour surveys

edge3

 

Bathymetric survey

Bathymetric survey – the process of collecting data on depths in the area of research, that is performed using suitable technical equipment and in special circumstances executed manually. After the required post-processing the results of the bathymetric survey are presented as an array of georeferenced depths within the zone of research. Depending on the coordinate system of clients choice, each depth is represented as a set of three values:

XYZ (northing and easting, depending on selected projection; depth).

Later bathymetric data may be used for such applications as:

  • Preparation of marine or nautical charts for safe navigation
  • Morphological analysis of bottom topography and coast
  • Sedimentation analysis (Sediment transport)
  • Monitoring of dredging activities
  • Planning, design, construction and monitoring of subsea engineering communications.

 

Singlebeam sonar systemMultibeam sonar system

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Singlebeam sonar system

Measuring equipment complex based on a single-beam echo sounder could be used for the hydrographical surveying and measuring jobs. These portable devices are installed on a small size vessel and may be operated in a hard to reach areas of a water reservoir, where small depths are present. Measurements may be taken in depths of 0.3-75 m, with an accuracy of .01m.  

The system consists of:

  • Single-beam echo sounder “OHMEX” – SonarMite v3
  • DGPS system, “TRIMBLE” Pathfinder Pro XP
  • HYPACK Hydrographical software

 

SonarMite v3 Specifications:

  • Transducer Frequency 235KHz Active Transducer
  • Beam Spread 8 to 10 Degrees
  • Depth Range0.30m to 75.00m (Software limited)
  • Accuracy+/-0.025m (RMS)
  • Sound Velocity Range1400 to 1600 m/sec
  • Data Output Range 2Hz

 

ohmex

sample

sample2

Bathymetric surveyMultibeam sonar system

Multibeam sonar system

Based on TELEDYNE RESON 7101-Flow, GPS system Trimble R4 GPS and OCTANS 3000 gyrocompass and motion sensor.

Baltijas Juras Geologijas Centrs owns a survey boat equipped with Multibeam sonar system capable of performing surveys in sheltered areas such as rivers, lakes, harbours and dams where the effects of motion are limited. Together with GPS system Trimble R4 data is gathered with precision of up to +-0.03m in horizontal direction.

Our multibeam sonar produces real-time, high resolution, three dimensional (3D) maps of the seafloor while providing co-registered simultaneous dual frequency side scan imagery.   The high number of channels enables superior rejection of multipath effects, reverberation and acoustic noise commonly encountered in the shallow water survey environment.

Sidescan sonar and bathymetric bottom profile and contour surveys for locating objects, identifying/documenting bottom features and search and recovery in lakes & rivers, estuaries and bays, coastal and offshore locations.

Construction inspection monitoring, geophysical surveys and both destructive selection and application of sophisticated equipment, and the utilization of certified technicians and inspection divers. Inspection services we provide include:

  • Submerged & buried pipeline and cable tracking and locating utilizing marine magnetometer, sub bottom profiler and DGPS tracking and navigation systems.
  • Sidescan sonar and bathymetric bottom profile and contour surveys for locating objects, identifying/documenting bottom features and search and recovery in lakes & rivers, estuaries and bays, coastal and offshore locations.
  • Current velocity and multibeam sonar bottom surveys, integration of ultra short baseline positioning with DGPS survey systems to create 3D mapping.
  • Deployment and recovery of oceanographic instruments with data loggers to record current and pressure, water quality, temperature and other sample data from culverts, outfalls, submerged structures and at open seabed locations.
  • Third party construction inspection during critical component stages requiring QC/QA of Owner’s contracted work for extensive or complex underwater repairs, new pipeline construction, field monitoring of marine construction materials, etc.

 

Multi_beam1   

sample_mb2

sample_mb3

multi_beam1

Bathymetric surveySinglebeam sonar system

Marine Magnetics Explorer – scientific instrument used to measure magnetic field by using Overhauser nucleate magnetic resonance technology, based on the magnetic properties of the hydrogen nuclei.

Consiquently, by using such highly precise Overhauser technology, magnetometer’s sensors does not allow the heading error and consequent legs traveled in the opposite direction perfectly match no matter in which direction Explorer is oriented in a magnetic field of the earth.

Magnetometer allows collecting data independently of the direction of the survey and survey location.

Explorer is equipped with high-precision GPS senson that allows tying the survey data to coordinates in UTM projection in WGS84 format.

Explorer may be used for such activities as:

  • Coastal geophysical survey
  • Archeology
  • Detection of shipwrecks
  • Detection of submarine pipelines
  • Magnetic mapping of ports
  • Detection of ferromagnetic objects in lakes, rivers and other woter bodies.

magnetometer

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H300 MKII - Inspection ROV depth rated to 300 m

Remotely operated underwater vehicle (ROV) for underwater inspection and study.  Multifunctional inspection robot is equipped with visual surveillance system, TV navigation camera, 5-function hydraulic manipulator, metal detector and the side scan sonar. The ROV’s maximum movement speed is 5 knots.

ROV is typically used for:

  • inspection works
  • rescue (relief) operations,
  • attaching hoisting slings and extracting large size objects from underwater
  • assisting in underwater drilling jobs
  • Underwater chute inspection etc.

Sufficient power and thrust to withstand sea currents up to at least 3 knots.

High performance viewing system, with both a colour/zoom TV camera (mounted on a full Pan/Tilt unit) and a B/W very low light TV camera.

High level of modularity, with a wide range of optional sensors and tools, mounted on the ROV itself or on interchangeable skids: 

  • Side scan sonar
  • Altimeter (with auto altitude function)
  • Positioning system
  • High resolution digital still camera
  • Manipulator arm
  • Metal detector
  • Single and ergonomic hand controller for both the ROV and a 5 functions manipulator arm.

 robot  robot2

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Core sample full spectrum analysis

"Baltijas Jūras Ģeoloģijas centrs" laboratories can perform soil tests in accordance with LVS EN 1997-2 "7. Eirokodekss. Ģeotehniskā projektēšana. 2. daļa: Pamatnes grunts izpēte un testēšana",  which sets the rules for soil testing in laboratory in accordance with ISO 17892 from 1-12 standard group. Laboratory is capable to test soil strength (shear) and stiffness (deformation) characteristics using the most advanced GDS Instruments produced equipment - triaxial static apparatus with local deformation and bender element metering option, as well as with direct shear with pore pressure control option. This gives the possibility to fully automate total and effective soil parameter determination, which allows to get the maximum accurate data for further geotechnical design. 

 

Equipment descriptionSummary of performed tests

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Soil testing laboratorySummary of performed tests

The GDS load frame-based triaxial testing system with BENDER Elements* and LVDT** measuring capability

Применение

Определение параметров прочности и жесткости грунтов соответственно следующим стандартам - LVS CEN ISO/TS 17892-8:2005 “Geotechnical investigation and testing - Laboratory testing of soil - Part 8: Unconsolidated undrained triaxial test”; LVS CEN ISO/TS 17892-9:2005 “Geotechnical investigation and testing - Laboratory testing of soil - Part 9: Consolidated triaxial compression tests on water satured soils”

Технические параметры

Connectivity

ADV (RS232 OR IEEE), STD (USB), EL (USB)

Data reception

16 Bit

Load limit (kN9

50kN

Pressure limit (MPa)

4MPa

Sample sizes

50mm 70mm 100mm diameter

*BENDER ELEMENTS measures the velocity of transverse and longitudal waves moving in the sample, defining the shear modulus G0, that characterizes the stiffness of the soil.

**The GDS LVDT Local Strain Transducers provide on-sample small strain measurements of axial and radial strain.

 GDS 3axis

Soil testing laboratorySummary of performed tests

GDS Back Pressured Shear Box with control of pore water pressure and back pressure control

Application

Determination of strenght and stiffness parameters of soil according to the following standarts- LVS CEN ISO/TS 17892-10:2005 “Geotechnical investigation and testing - Laboratory testing of soil - Part 10: Direct shear tests”

Technical specification

Data entry

8 channels, 16 bit wi, 10mV to 10V

Dimensions

L= 875mm x W = 350mm

Precision

<0.1% FSO

Dispacement limits

Vertical = +/- 15mm, horizontal = +/- 25mm

Power

240V or 110V 50/60Hz single branch

Measurement accuracy

16 bit (± 25mm = ± 0.7μm(shear), ±10mm = ±0.3μm (vertical)

Sample dimensions

100mm x 100mm

 GDS_back_pressure

Soil testing laboratorySummary of performed tests

Proctor Molds

Application

Standart and modified Proctor test according to guidelines set in LVS EN 13286-2:2005 „Nesaistītie un hidrauliski saistītie maisījumi. 2.daļa: Laboratorijas atsauces blīvuma un ūdens satura testēšanas metodes. Proktora sablīvēšana”

 proctor_mould

Soil testing laboratorySummary of performed tests

Proctor hammers

Application

Standart and modified Proctor test according to guidelines set in LVS EN 13286-2:2005 „Nesaistītie un hidrauliski saistītie maisījumi. 2.daļa: Laboratorijas atsauces blīvuma un ūdens satura testēšanas metodes. Proktora sablīvēšana”

 Proctor_hammer

Soil testing laboratorySummary of performed tests

CBR testing machine / Marshal test 50 kN

Application

Test is performed according to LVS EN 13286-47:2012 „Unbound and hydraulically bound mixtures – Part 47: Test methods for the determination of California bearing ratio, immediate bearing index and linear swelling”

Technical specification

Machine framed with double load. Two modes of speeds- 1 mm/min and 1.27 mm/min, in addition - rapid recovery mode. CBR scale – within 250mm diameter, gradation accroding to ISO 7500/1. External indicator 30mm with precision of 0.01mm. 230v, 50Hz

CBR

Soil testing laboratorySummary of performed tests

Proctor penetrometer

Application

Quick test, that can be used to determine the soil moisture and compaction degree in field conditions in accordance with ASTM D 1558-99. Suitable for fine-grained soils.

Technical specification

9 diffent nozzles with diameters 4.52; 5.23; 6.40; 9.07; 12.83; 16.54; 20.22; 24.79; 28.55 mm, according to ASTM D 1558-99. Weight – 8kg

Proctora_penetrometr

Soil testing laboratorySummary of performed tests

Fall cone apparatus for determining properties of consistency and undrained bondage of clay soils

Application

Test for determining the undrained bondage of soils in accordance with LVS CEN ISO/TS 17892-6:2005 “Geotechnical investigation and testing - Laboratory testing of soil - Part 6: Fall cone test” and clay soil consistensy determination according - LVS CEN ISO/TS 17892-12:2013 L “Geotechnical investigation and testing - Laboratory testing of soil - Part 12: Determination of Atterberg limits (ISO/TS 17892-12:2004)"

FALLING_CONE

Soil testing laboratorySummary of performed tests

Filtration coefficient determination apparatus in accordance to GOST 25584-90

Application

Filtration coefficient determination in accordance with GOST 25584-90/LVS CEN ISO/TS 17892-11:2013 L “Geotechnical investigation and testing - Laboratory testing of soil - Part 11: Determination of permeability by constant and falling head”

Technical specification

  • Stainless steel filtration tube, volume 200 cm3
  • Test speciment height: 100mm
  • Piezometer scale range: 0-50
  • Scale interval unit: 5 mm
  • Fall unit weight: 500 g
  • Fall height: 300mm

filltration coefficient

Soil testing laboratorySummary of performed tests

Laboratory test sieves, 200 mm diameter, Haver & Boecker

Application

Grain-size classification of soil in accordance to LVS CEN ISO/TS 17892-4:2005 “Geotechnical investigation and testing - Laboratory testing of soil - Part 4: Determination of particle size distribution”/ LVS EN 933-1:2013 L “Tests for geometrical properties of aggregates - Part 1: Determination of particle size distribution - Sieving method”

Technical specification

  • In accordance with ISO 3310-1
  • With rubber insertion and stainless steel frame
  • To 2mm – plaited, from 4mm – perforated

sieves

Soil testing laboratorySummary of performed tests

Grain-size classification using the hydrometer method

Application

Grain-size classification of soil in accordance to LVS CEN ISO/TS 17892-4:2005 “Geotechnical investigation and testing - Laboratory testing of soil - Part 4: Determination of particle size distribution” for soils sized  <63µm

 Grain_size

Soil testing laboratorySummary of performed tests

Portable pH-meter

Application

Quick test for determining pH level and temperature of soil both in laboratory and on site.

Technical specification

Measurement range

Voltage mV

-1999 to 1999

pH

-2.00 to 16.00

Aut. temperature °C

-10.0 to 120.0

Manual temperature °C

- 5.00 to 90.0

Resolution

Voltage mV

1

pH

 

Auto/Man. temperature °C

 

Precision

Voltage mV

+/-0.1% +/- 1 digit

pH

+/-0.1% +/- 1 digit

Auto/Man. temperature °C

+/-0.5°C

Size mm

228 x 76 x 25

Svars

 

 COMPACT_PH

Soil testing laboratorySummary of performed tests

Сводка тестов грунтовой лаборатории

 

 

Determined parameters

  

Standarts

  

Apparatus

 

Soil physical properties:

 
moisture
 

LVS CEN ISO/TS 17892-1, GOST 5180-84

 

Oven

density
  LVS CEN ISO/TS 17892-2, GOST 5180-84   Stamp, scales
mineral particle density
  LVS CEN ISO/TS 17892-3, GOST 5180-84   Piknometer
fluidity and plasticity limits
  LVS CEN ISO/TS 17892-12   Fall cone
Granulometry by hydrometer method
  LVS CEN ISO/TS 17892-4    Hydrometers/aerometers
sieve analysis (up to 1kg)
  LVS EN 933-1:1997   Digital sieve shaker for Ø 200 mm sieves, Laboratory sieve set Ø 200 mm (0.063 mm, 0.125 mm, 0.250 mm, 0.500 mm, 1 mm, 2 mm, 4 mm, 5.6 mm, 8 mm, 11.2 mm, 16 mm, 22.4 mm, 31.5 mm, 45 mm, 63 mm, Sieve pan)
sieve analysis (1-5 kg)
  LVS CEN ISO/TS 17892-4, LVS EN 933-1:1997, GOST 12536-79, GOST 8735-88   Digital sieve shaker for Ø 200 mm sieves, Laboratory sieve set Ø 200 mm (0.063 mm, 0.125 mm, 0.250 mm, 0.500 mm, 1 mm, 2 mm, 4 mm, 5.6 mm, 8 mm, 11.2 mm, 16 mm, 22.4 mm, 31.5 mm, 45 mm, 63 mm, sieve pan)
sieve analysis (more than 5kg)
  LVS CEN ISO/TS 17892-4, LVS EN 933-1:1997, GOST 12536-79, GOST 8735-88, LVS ISO 3310-1   Digital sieve shaker for Ø 200 mm sieves (0.063 mm, 0.150 mm, 0.212 mm, 0.300 mm, 0.425 mm, 0.600 mm, 1.18 mm, 2 mm, 3.35 mm, 5 mm, further perforated 6.3 mm, 10 mm, 14 mm, 20 mm, 28 mm, 37.5 mm, 50 mm, 63 mm, 75 mm, Sieve pan)
determination of organic content
  ASTM D 2974-07a, LVS EN 13039:2003   Muffle furnace
filtration coefficient (clay soil)
  LVS CEN ISO/TS 17892-11, GOST 25584-90   Triaxial testing equipment with filtation coefficient determination ability
filtration coefficient (sandy soil)
  LVS CEN ISO/TS 17892-11, GOST 25584-90   Filtration apparatus according to GOST 25584-90
maximum compaction at optimum moisture (Proctor compaction test)
  LVS EN 13286-2:2011, GOST 22722-2002   Standard and modified Proctor molds and hammers
soil pH determination
  LVS ISO 10390:2005   pH determination apparatus (laboratory/stationary)
 

Soil mechanical properties:

 
fall cone test (unconsolidated undrained: cu)
   LVS CEN ISO/TS 17892-6:2005    Fall cone apparatus
Proctor penetrometer (field test/express)
  ASTM D1558; LVS EN 13286-2:2012 L   Proctor penetrometer (field test)
Field vane test (unconsolidated undrained: cu)
  EN ISO 22476-9; DIN 4094-4;   Field vane test
shear resistance (unconsolidated undrained: fi', c')*
  LVS CEN ISO/TS 17892-10, GOST 12248-96   Ražotājs: GDS Instruments Modelis: GDSBPS
shear resistance (consolidated drained: fi', c')*
  LVS CEN ISO/TS 17892-10, GOST 12248-2010  
compressibility (mo, E)***
  LVS CEN ISO/TS 17892-5,GOST 12248-2010   Old USSR equipment / 3 oedometer kit
compressibility (mo, E, Cv, Kf)***
  LVS CEN ISO/TS 17892-5, GOST 12248-2010   Old USSR equipment / 3 oedometer kit
triaxial study unconsolidated undrained (NN (UU): cu)**
  LVS CEN ISO/TS 17892-8, GOST 12248-2010, BS 1377-7   Manufacturer: GDS Instruments Model:ADVTAS 4MPa / 50kN with Benders and LVDT
triaxial study unconsolidated undrained (KN (CU): fi', c', E)**
  LVS CEN ISO/TS 17892-9, GOST 12248-2010, BS 1377-8  
triaxial study unconsolidated drained (KD (CD): fi', c', E)**
  LVS CEN ISO/TS 17892-9, GOST 12248-2010, BS 1377-8  
uniaxial compression resistance
  LVS CEN ISO/TS 17892-7, GOST 12248-2010   CBR mechanical equipment
CBR (California bearing ratio)
  LVS EN 13286-47:2004 A, ASTM D 1883   CBR mechanical equipment
 

Software:

 
PLAXIS 3D
GGU-Atterberg
  LVS EN ISO 14688-2   Fall cone
GGU-Compact
  LVS EN 13286-2:2010   Standard and modified Proctor molds and hammers
GGU-Directshear
  DIN 18137-3   Manufacturer: GDS Instruments Model: GDSBPS
GGU-Labperm
  DIN 18130   Filtration apparatus according to GOST 25584-90
GGU-Oedom
  LVS CEN ISO/TS 17892-5   Old USSR equipment / 3 oedometer kit
GGU-Sieve
  DIN 4022, LVS ISO 14688-1   Laboratory sieve set Ø 200 mm (0.063 mm, 0.150 mm, 0.212 mm, 0.300 mm, 0.425 mm, 0.600 mm, 1.18 mm, 2 mm, 3.35 mm, 5 mm, further perforated 6.3 mm, 10 mm, 14 mm, 20 mm, 28 mm, 37.5 mm, 50 mm, 63 mm, 75 mm, Sieve pan)
GGU-Uniaxial
  DIN 18136, LVS CEN ISO/TS 17892-7   CBR mechanical equipment

 

 *  Effective indicators, as pore water pressure is measured, and in addition the growth of pressure may be controlled allowing to simulate realistic field conditions** Effective indicators, as pore water pressure is measured***Currently unavailable. May  be connected to the system that is used for triaxial test.
** Effective indicators, as pore water pressure is measured
***Currently unavailable. May be connected to the system that is used for triaxial test.

Soil testing laboratoryEquipment description

content will be available later

FLIR T420 thermal imaging cameraTotal stationAcoustic Doppler Current ProfilerCoring apparatusMultifunctional weather stationThe low range turbidimeter Portable multifunctional water quality analyzer Aquameter

FLIR T420 thermal imaging camera

Baltijas Jūras Ģeoloģijas Centrs is equipped with high performance industrial infrared Camera Flir T420 with a range of measured temperatures from -20 до +650 С, the factory calibration and accuracy of 2% of the measured results. Precise infrared image has a high contrast and resolution of 76800 pixels and 4x digital zoom.

Can be used in all industries where there is a need to ensure quality control of the production process, to promptly and timely monitor heat changes in individual parts of the machine or mechanism as a whole.

flir1  flir2

flir3  flir4

Other measurementsTotal stationAcoustic Doppler Current ProfilerCoring apparatusMultifunctional weather stationThe low range turbidimeter Portable multifunctional water quality analyzer Aquameter

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Total station

Baltijas Juras Geoloģijas Centrs owns a multifunctional electronic total station Trimble S6, that can provide versatility and excellent measurement accuracy – the angles are determined with an accuracy of 5 seconds, allowing to use the instrument for a wide variety of surveying jobs. The device has the ability to capture and track different targets and also the classical reflection lenses at a distance. Trimble DR measuring technology increases the distance range of surveying without the use of reflector, so it is easy to reach points that are otherwise hard to reach, for example -  facades.

Here at Baltijas Jūras Ģeoloģijas Centrs we can solve the following problems:

  • Topographic surveying
  • Landscape and cadastral works
  • Setting out

Other measurementsFLIR T420 thermal imaging cameraAcoustic Doppler Current ProfilerCoring apparatusMultifunctional weather stationThe low range turbidimeter Portable multifunctional water quality analyzer Aquameter

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Direct-reading Acoustic Doppler Current Profiler

Direct-reading Acoustic Doppler Current Profiler Workhorse Monitor (ADCP)manufactured by „Teledyne RD Instruments”. The Monitor is typically bottom frame-mounted and hard-wired to shore to provide real-time monitoring of coastal currents at set depths and wave height monitoring in the frequency range of 0.5 seconds to 24 hours and layers of 0.2 to 8 meters. 

Extreme accuracy and reliability: The Monitor is ideally suited for the most demanding environments, including high traffic areas such as ports and harbors.

A four-beam solution: Teledyne RDI’s patented 4-beam design improves data reliability by providing a redundant data source in the case of a blocked or damaged beam; improves data quality by delivering an independent measure known as error velocity; and improves data accuracy by reducing variance in your data.

adcp1

Other measurementsFLIR T420 thermal imaging cameraTotal stationCoring apparatusMultifunctional weather stationThe low range turbidimeter Portable multifunctional water quality analyzer Aquameter

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Sediment gathering samplers

KC Van Veen Grab bottom grab sampler

A handheld bucket sampler for collecting bottom sediments for biological, hydrological and environmental studies.

The sampler is lowered from the watercraft with a rope and when it is in contact with the bottom, mechanism activates the closure flaps that allows gripping the sediment.

Subsequently Baltijas Juras Ģeoloģijas Centrs produces a full range of physical and chemical analysis of the soil in the laboratories.

Van Veen Grab

KC Kajak Sediment Core sampler

A handheld Kajak Corer sampler is equipped with a removable acrylic coring tube (diameter 80mm, length 1m) that allows taking core samples from the bottom of shallow waters (up to 4m).

kajak corer

Other measurementsFLIR T420 thermal imaging cameraTotal stationAcoustic Doppler Current ProfilerMultifunctional weather stationThe low range turbidimeter Portable multifunctional water quality analyzer Aquameter

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Other measurementsFLIR T420 thermal imaging cameraTotal stationAcoustic Doppler Current ProfilerCoring apparatusThe low range turbidimeter Portable multifunctional water quality analyzer Aquameter

Turbidity and floating particle analyzer

Industrial turbidity and floating particle analyzers with SOLITAX nephelometric adapters may be applied to a wide range of works. Those adapters can determine the level of turbidity in both ultra clean and opaque water. Additionally, the system can analyze the water for floating particles of sludge in its active and dewatered states. The SC200 controller processes the data through two independent digital channels and allows using either one or two adapters at the same time.  Both readings are shown on the display of the controlled and may be stored on SD-card or transferred to other controller by either analogue or digital signal.

Other measurementsFLIR T420 thermal imaging cameraTotal stationAcoustic Doppler Current ProfilerCoring apparatusMultifunctional weather stationPortable multifunctional water quality analyzer Aquameter

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Portable multifunctional water quality analyzer Aquameter

Baltijas Juras Geoloģijas Centrs owns sophisticated, yet easy to use multiparameter water quality test system that can measure dissolved oxygen content, salinity, turbidity, permeability and pH content within dissolved substances. The measuring device is equipped with GPS module to ensure the geotagging of gathered field data.

With an outside diameter of just 42mm the Aquaprobe has been designed to fit comfortably into pipes, wells and bore-holes. 

The list of measurable parameters:

  • Dissolved oxygen content (mg/l)
  • Dissolved oxygen content (%)
  • Hydrogen Indicator (pH)
  • Reduction potential
  • Temperature
  • Atmospheric pressure
  • Turbidity

aquaread

Other measurementsFLIR T420 thermal imaging cameraTotal stationAcoustic Doppler Current ProfilerCoring apparatusMultifunctional weather stationThe low range turbidimeter

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Projects

River Ogre mouth bathymetric survey

The scope of the „Ogres ietekas Rīgas HES ūdenskrātuvē sanešu izpēte” project included hydrographic survey works within Ogre river waterarea up the stream (1700m in lenght) and in Daugava river waterarea (2500m in lenght), in coordinates X 534849.05 Y296739.50 un X 538656.23 Y 296582.6. All works were performed according to International Hydrographic Organization standards. Total area of the surveyed site was 1085000 m2.

In the course of works the bathymetric survey of the site was performed and the total volume of deposited sediment was calculated.

The total volume of sediment depositions was 447449.81 m3, which also included the inclusions of the rocks (Ø60-300mm).

The average layer thickness of the deposition was around 1m, and reached 3m in height in some areas.

The volume calculations were provided, along with bathymetric maps of the site and depths until top and lower levels of the sediment boarders. Sub-bottom profiles were also graphically derived and submitted to the Client.

During the coarse of the surveying job, the single beam echo sounder, SBS-424 sub-bottom profiler were used in conjunction with Trimble Geo Explorer XT receiver.

Survey works at lake Prokhorokolokolovskoye (Kazakhstan)

The scope of survey works on Prokhorokolokolovskoye lake (Kazakhstan) included using single beam echosounder and StrataBox sub-bottom profiler and the following results were then produced:

  1. The bathymetric survey maps of Prokhorokolokolovskoye lake was produced, with distance between survey lines of 5m and 10m. Also the maps with applied isobaths of 0.5 m depth were produced. Documenets were supplied to the Client in WGS-84 coordinate system.
  2. The volume of water in the lake was calculated in areas S1(main waterarea of 191 ha) and area S2 (area of 21 ha), which are 4116818 m3 and 412912 m3 resceptively.
  3.  The maps of sludge deposit heights were produced in meshes of 5 and 10 m. Additionaly, the map of sludge deposits with applied isobaths of 0.5m was created, also depths to the top and lower level of sludge layer maps were generated.
  4. The total amount of sludge deposition in the lake was calculated

Contacts

Centrālais birojs

Klūgu iela 3A, Rīga, LV-1084

Tel.: +371 67 568 363

E-pasts: info@bjgc.lv

 

Janis Terauds

Tel.: +371 29 216 583

 

Jevgenijs Suhomlinovs

Tel.: +371 29 490 274

 

Konstantins Pokatovs

Tel.: +371 28 633 205

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