Visit at the flume laboratory together with MSc student Verena Sturm (with red shirt), Frank-Walter Steinmeier, the president of Germany (right side of the picture), Rubi Rivlin, the president of Israel (second from the left side of the picture), Prof. Dani Haimovich, the president of BGU (standing between the presidents), and Prof. Noam Weisbrod, the Director of the J. Blaustein Institutes for Desert Research (left side of the picture).
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A picture showing solute exchange under losing and gaining flow conditions. The streambed is composed of sand with a dune-shaped bed forms (yellow). The dye was injected into the overlying water (dark blue) and the dye penetration into the streambed appears in blue.
Click here to be directed to the relevant publication. |
Time series photographs of dye penetration into the sand bed under neutral, losing, and gaining conditions. Flow was from left to right at an overlying water velocity of 12.3 cm/s.
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A sketch of the flume that is used to study biogeochemical processes in streams
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Videos of a dye tracer experiments that show hyporheic exchange in homogeneous stream bed
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Neutral conditions
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Losing conditions
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Gaining conditions
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Follow this link to see a video of hyporheic exchange @ V= 12.3 cm/s
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Follow this link to see a video of hyporheic exchange @ V= 12.3 cm/s, losing flux= 49 cm/day.
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Follow this link to see a video of hyporheic exchange @ V= 12.3 cm/s, gaining flux= 49 cm/day.
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Videos of a dye tracer experiments that show hyporheic exchange in heterogeneous stream bed
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Neutral conditions
Follow this link to see a video of hyporheic exchange @ V= 15 cm/s
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Losing conditions
Follow this link to see a video of hyporheic exchange @ V= 15 cm/s, losing flux= 49 cm/day.
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Gaining conditions
Follow this link to see a video of hyporheic exchange @ V= 15 cm/s, gaining flux= 49 cm/day.
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The flume laboratory under construction
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The flume laboratory during a busy moment where Aryeh (left), Effie (holding her head) & Natalie (walking) are conducting measurements
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Studying oxygen consumption under moving streambed - For more details see Wolke et al. 2020- https://www.mdpi.com/2073-4441/12/1/62
Oxygen profiling in the biofilms that were developed in the flumes
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Traverser system (HR Wallingford Ltd)
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A traverser system for sensor positioning (left) is used to position and measure velocity profiles using Nortek profiler and surface topography with laser sensor (right).
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Velocity distribution and discharge measurements in the Yarqon Stream using the StreamPro ADCP
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Velocity and discharge measurements in the Yarqon stream using Sontek ADV
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Oxygen profiling in the Yarqon Stream
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Oxygen profiling in the Yarqon Stream
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Team work during 48-hr sampling as part of the Worldwide Hydrobiogeochemistry Observation Network for Dynamic River Systems (WHONDRS). https://whondrs.pnnl.gov/
Water sampling in Lake Yeruham
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Searching for fish
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The Yarqon Stream after a flood. Water level during the flood can be traced by the plastic bags on the trees
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Inbal and Tal enjoying the sampling of sewage sludge
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Nimrod download temperature data in the Yarqon Stream
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Shai & Sarig think what to do next....
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Prof. Philippe Renard from the Université de Neuchâtel teaching Geostatistics at BGU
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What to do when your son doesn't want to go to school
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Common animals that visit my office window
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Sometimes we meet outside of the lab
