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Water flows in the natural environment Stephen M. Henderson.

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Presentation on theme: "Water flows in the natural environment Stephen M. Henderson."— Presentation transcript:

1 Water flows in the natural environment Stephen M. Henderson

2 Waves Sediment Transport Currents

3 Motivation: $, safety, habitat, pollution etc

4 Field experiments

5

6 Field Instrumentation: velocity/temperature

7 East North Vertical Temperature Temperature/Salinity/Depth: 7 instruments, 1Hz sampling, 10 -3 C accuracy 25 instruments, 4 min sampling, 10 -1 C accuracy Velocity: 9 instruments, 8Hz sampling, 10 -3 m/s accuracy, 2m range, 1.5cm bins, 5cm/s max velocity or 1 min sampling, 5cm/s accuracy, 6m range, 0.3m bins, any velocity or 10 min sampling, 1cm/s accuracy, 20m range, 0.7m bins, any velocity or 2 instruments 64Hz sampling, 10 -3 m/s accuracy, single measurement in cm 3 bin + eddy correlation heat flux

8 Field Instrumentation: other 2 weather stations: Air temperature, relative humidity, velocity, net radiation GPSs

9 Pen & paper theory Water is not created of destroyed, and F=Ma… Leads to pdes for water motion, sometimes can be solved with standard applied math techniques.

10 Computer simulations


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