Title: Environment Agency RHS Video

Recognising Flow Types

How would you recognise unbroken standing waves? Click for answer.
- Babbling water with a -dragon-back’ surface;
- upstream facing wavelets that are not broken (i.e. not white water).
- Mostly associated with the presence of a riffle.

Problems: Spot checks and sweep up

What is a pool, how would you identify it and where would you typically find them? Press play for answer.

They are characterised by

- Deeper parts of the channel
- Between 1-3 times channel width,
- Scour feature,

They are Found

- Outside of meanders,
- Downstream of riffles, bedrock outcrops and Weirs

Geomophology and valley/channel features out of the flow

What feature differentiates a mature island from a vegetated bar?
A mature island does not submerge at bank full level - it still stands proud.

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Free Fall flow example

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Chute

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Broken Standing Wave

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Unbroken Standing Wave

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Rippled Flow

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Smooth boundary turbulent flow

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: No perceptible flow

What flow type is this?  Think of an answer.  Press play to continue and learn the answer.

Flow Example: Upwelling flow

Choose the correct statement.