Starter Process or Store List numbers 110 in your books and write whether you think the following parts of the hydrosphere are stores or processes 1 Ice Caps 2 Rain 3 Rivers 4 Condensation ID: 379299
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Slide1
GCSE: HydrologySlide2
Starter: Process or Store?
List numbers 1-10 in your books and write whether you think the following parts of the hydrosphere are stores or processes…Slide3
1. Ice CapsSlide4
2. RainSlide5
3. RiversSlide6
4. CondensationSlide7
5. CloudsSlide8
6. LakesSlide9
7. EvaporationSlide10
8. Sea IceSlide11
9. PlantsSlide12
10. AtmosphereSlide13
Lesson Objectives
To recap the hydrological cycle and hydrosphere
To investigate what factors affect a river’s discharge
To know what a hydrograph is and what it showsSlide14
What is River
Discharge?
River Discharge= The Volume of Water in a river passing a point in a given time, measured in cumecs (cubic metres per second)
Discharge= Velocity
x
Cross
sectional areaSlide15
What Factors Affect River Discharge?
Create a spider diagram using half a page in your booksSlide16
Lesson Objectives
To recap the hydrological cycle and hydrosphere
To investigate what factors affect a river’s discharge
To know what a hydrograph is and what it showsSlide17
Hydrograph
Record of River Discharge over a period of time
River
Discharge
=
cross sectional area
rivers mean (average) velocity
X
(at a particular point in its course)
Storm Hydrographs
Show the change in discharge caused by a period of rainfallSlide18
Construction
Of
Storm (flood) Hydrographs
©
Microsoft Word clipartSlide19
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
Base flow
Through flow
Overland flow
Rising limb
Recession limb
Basin lag time
mm
4
3
2
Peak flow
Flood HydrographSlide20
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)Slide21
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
mm
4
3
2
Rainfall shown in mm, as a bar graph
Slide22
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
mm
4
3
2
Discharge in m
3
/s, as a line graphSlide23
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
Rising limb
mm
4
3
2
Rising limb
The rising flood water in the riverSlide24
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
Rising limb
mm
4
3
2
Peak flow
Peak flow
Maximum discharge in the riverSlide25
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
Rising limb
Recession limb
mm
4
3
2
Peak flow
Recession limb
Falling flood water in the riverSlide26
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
Rising limb
Recession limb
Basin lag time
mm
4
3
2
Peak flow
Basin lag time
Time difference between the peak of the rain storm and the peak flow of the riverSlide27
0 12 24 36 48 30 72
Hours from start of rain storm
3
2
1
Discharge (m
3
/s)
Base flow
Rising limb
Recession limb
Basin lag time
mm
4
3
2
Peak flow
Base flow
Normal discharge of the riverSlide28
Storm Hydrographs
Storm hydrographs show how a river’s discharge changes after a storm. Depending on a number of factors, the hydrograph can change considerably in shape.
VideoSlide29Slide30
Worksheet
Extension Exercise: On the desk at the frontSlide31
Lesson Objectives
To recap the hydrological cycle and hydrosphere
To investigate what factors affect a river’s discharge
To know what a hydrograph is and what it showsSlide32
Plenary
High or Low Discharge? Sticky Labels