Stream Physical Properties

Question 1

Characteristics of Lakes

Answer 1

No net flow

Autochthonous(?)

Adult crustaceans (stay in system)

verticle depth

Question 2

characteristics of river

Answer 2

net unidirectional flow

allochthonous

immature aquatic insects

(emerge from system)

Longitudidal (river continuum concept - rcc)

• -

Question 3

types of flow

Answer 3

Riffles

Pools

Runs

Question 4

Spate

floods

Spring Increase of flow (snow melt)

Answer 4

Increase in disharge where water stays in channels

water moves out of channel onto land

freshet

Question 5

Why are floods good.

Answer 5

Natural fertilizer with each floods

Question 6

Stream Classififcations (lots)

Name 5

Answer 6

1. European system (Rhithron/Potamon)
2. River Continuum Concept (RCC)
3. Stream order (drainage network)
4. Rosgen system
5. Management classifications (FPC/FRPA)

Question 7

Described Rhithron

Answer 7

• cooler upper reaches (headwater streams)
• monthly mean water temp <20*C
• high gradient
• always high levels of O2
• coarse substrate
• clean water
• no true plankton

Question 8

Describe Potamon

Answer 8

• monthly mean temp >20*C
• sometimes O2 deficiency
• slower current
• more turbidity
• more finer substrates
• may get plankton

Question 9

Describe the RCC (river continuum concept)

Answer 9

Looks at 1. physical habitat 2. Food resources 3. biological community

3.cont. present conditions, upstream processes.

Question 10

Describe management classification - FRPA

Answer 10

–e.g., FRPA S1, S2 ® S6
–width
–fish bearing (especially salmonids)
–community watershed
–ecological connectivity

Question 11

Nutrients

Answer 11

• Remember that PO4 carried as particulate, but NO3 moves dissolved (PO4 = 37% dissolved, NO3 = 97% dissolved)
• proportion varies stream to stream (climate, watershed, etc.)
• get a seasonal pattern due to snow melt, in temperate rivers