a field trip to the congo hydroacoustic measurements in the river that swallows all rivers
Download
Skip this Video
Download Presentation
A Field Trip to the Congo-- Hydroacoustic measurements in "the river that swallows all rivers"

Loading in 2 Seconds...

play fullscreen
1 / 27

A Field Trip to the Congo-- Hydroacoustic measurements in "the river that swallows all rivers" - PowerPoint PPT Presentation


  • 92 Views
  • Uploaded on

A Field Trip to the Congo-- Hydroacoustic measurements in "the river that swallows all rivers". John Shelton South Carolina Water Science Center. Congo River Project. History with AMNH Field verification of model predictions (depth, slope, stream power, roughness, Froude)—WHY??

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' A Field Trip to the Congo-- Hydroacoustic measurements in "the river that swallows all rivers"' - courtney


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
a field trip to the congo hydroacoustic measurements in the river that swallows all rivers

A Field Trip to the Congo--Hydroacoustic measurements in "the river that swallows all rivers"

John Shelton

South Carolina

Water Science Center

congo river project
Congo River Project
  • History with AMNH
  • Field verification of model predictions

(depth, slope, stream power, roughness, Froude)—WHY??

  • Acoustic and Water Quality measurement

--Fish diversity definition

--OSW time tests

--Turbulence definition

--QW field parameters and samples

  • --Bathymetry
  • --Discharge
slide4

Congo River is a major biogeographic barrier

American Museum of Natural History

slide5

“...landlocked system was captured in the Miocene (5-15 mya) by a short

river draining into the Atlantic Ocean, producing the drainage pattern

of Central Africa seen today.” (Stankiewicz & de Wit, 2006)

BUT others claim the capture event happened as recently as 400,000 ya (very young) while yet others claim it occurred as long ago as 35mya (very old)

American Museum of Natural History

slide7

CURRENT SPECIES COUNT ca. 135

~ 30% endemism

American Museum of Natural History

slide8

Lamprologus werneri

Lamprologus tigripictilis

Lamprologus lethops

American Museum of Natural History

slide9

Lamprologus lethops

American Museum of Natural History

field verification and hydroacoustic measurements
Field Verification and Hydroacoustic Measurements
  • 7-man kayak team
  • 80 mile reach
  • NGS Photo/ videography
  • Single line bathymetry
slide11

Kayak Team

2X

  • Differential GPS
  • Echo sounder
  • Power supply
  • Data logger
  • Kayak-cam
  • Helmet-cam
  • QW sampling supplies
congo river at luozi
Congo River at Luozi
  • 1.26 million CFS in 22 minutes
  • 1.3 miles wide
  • 80 feet deep
processing issues
Processing Issues
  • Power
  • Power
  • Bugs
slide18

Water-quality monitor

Solar Panel

Differential GPS

Echo sounder transducer

300 kHz ADCP

Laptop

Echo sounder

Power supply

slide19

What IS the deepest river??

ADCP Beam Depth

Echo Sounder Depth

velocity distribution relearned
Velocity Distribution--Relearned
  • Areas of significant down-welling
  • Downstream “jets” at depth
adcp measurements lower congo river 2008
ADCP measurements: Lower Congo River 2008
  • 6 random transects
  • Four surveys

Ned Gardiner, PhD AMNH/NOAA

below bulu
Below Bulu

Ned Gardiner, PhD AMNH/NOAA

turbulence definition longitudinal transect
Turbulence Definition—Longitudinal transect
  • Accelerations in “constricted” areas
  • Velocity “ramps” and “dives” due to bedforms
where do we go from here
Where do we go from here?
  • Primary data processing/interpretation
  • Relate hydraulic data to fish data
  • Visualization products

--Animations, fact sheets, NG Explorer

    • Water-quality samples (nutrients, major cations, metals)
  • Future projects
ad