Unit 1A Water Part 2

Lesson 5

This is the classwork files:

Here is the PowerPoint for this week:

and for this week's homework:

Coach house geography has a YouTube vid about how and why the 3 Gorges dam was built. I cannot seem to get videos to run so well on this site

A MUST SEE Video of the Three Gorges - excellent summary of all you might need to know and more

Up-to-date resource on water usage in India

Lesson 6

This is the classwork files:

Here is the PowerPoint for this week:

and for this week's homework: is to be given in
This is the one I emailed and is NOT to be given in. Just make sure you know the words for this unit!!

If you really want uptodate stuff about the River Tees flood control plans, this is it! I have been plaguing the relavant authorities for info, which has been promised on several websites - I gather that this has not yet been published, but they sent it to me anyway!

A article about Yarm that adds a bit!

New flood defenses for Yarm

From the Northern Echo, first published Friday 29th Nov 2002.
It was designed to withstand once in 100 year floods - but two years after Yarm's £2.1m flood defense scheme was opened it was realized the walls had not been built high enough.
The floods of 1995 turned Yarm High Street into a canal with water up to 18 inches deep. After running out of sand - 40 tons of it, shoveled into 1,500 bags - Stockton Council provided anxious residents with ramparts made from 500 bags of rock salt.
Now a further £2m has been spent on building up the defense walls.
The Environment Agency says the original scheme completed in 1993, protected the town from flooding several times.
It says knowledge gained following the 1995 flood showed that the original height of the flood walls gave a lower than desirable standard of protection.
The upgrade has given the walls another half metre in height.
Jo Turnbull, chairwoman of the Northumbria Regional Flood Defence Committee, said: "This improved scheme is a major step forward to providing better flood protection for residents and businesses in Yarm.
"Although we can never prevent flooding, the work will reduce the frequency of flooding and members of my committee recognised the need by agreeing to help fund the project.''
Construction work on the original scheme, opened by the town's then Tory MP, Tim Devlin, was not helped by a sub contractor going bust.
The hydraulic modeled defenses had been designed to withstand severe floods which return every 100 years. The floods which occurred in 1995 - just two years after the scheme was completed - were said to happen only every 50 years.
Looped by the River Tees, Yarm has always been prone to flooding. In the great floods of 1881 boats were actually rowed up and down the High Street.
Found here

More flooding UK

Cause of flooding on YouTube about Glasgow
abstraction Removal of water from rivers, lakes or groundwater, for human use.
aquifer A permeable rock, such as limestone, which is capable of holding and
atmosphere The mixture of gases, predominantly nitrogen, oxygen, argon, carbon
dioxide and water vapour, that surrounds the Earth.

attrition The process whereby the load carried by rivers, winds and waves is reduced
in size and becomes more rounded.

base flow That part of a river’s discharge fed by groundwater.
base-level The lowest level to which a stream or river can erode its valley.
capacity (of a stream) The load of a river at a particular time or location.
channel The part of a valley floor occupied by the flowing water of a stream or river.
channelisation The straightening, deepening, widening or lining of a river’s course,
mainly to reduce the risk of flooding.

confluence The meeting of a river and its tributary.
corrasion Physical erosion caused by rock hitting rock, as for example when the load
carried by a river strikes the bed and banks as it is transported.
corrosion The chemical erosion (solution) of rock, such as limestone, by flowing

delta A low-lying area found at the mouth of a river and formed of material deposited
by the river.

discharge The quantity of water that passes a given point on the bank of a stream or
river within a given period of time.

drainage basin The area drained by a river and its tributaries, bounded by a
erosion The wearing down of the land by water, ice, wind and gravity.
evaporation The changing of a liquid into vapour or gas at a temperature below its
boiling point.

evapotranspiration The transfer of water to the atmosphere by evaporation and plant
flood plain That part of a valley floor over which a river spreads during seasonal

groundwater Water held below the water table in aquifers.
hydraulic action The force exerted by moving water on the bed and bank of a
hydrograph A graph on which variations in a river’s discharge are plotted against time.
hydrological cycle The unending movement of water between land, sea and

impermeable Rocks that do not allow water to pass through them.
infiltration The movement of water from rain or melting snow into the ground.
interlocking spurs A series of ridges projecting out on alternate sides of a valley and
around which a river winds its course.

irrigation The supply of water to the land by means of channels, streams and
sprinklers in order to permit the growth of crops in dry areas.

levee A bank of sediment formed along the edge of a river channel deposited by

load The materials transported by a stream or river in solution, in suspension and by
saltation and traction.
meander A pronounced bend in a river.
overland flow The movement of precipitation, particularly rain and melt-water, over the
ground; a part of
peak flow The maximum discharge of a river after heavy precipitation.
percolation The process by which water seeps downward through rock.
permeable The quality of rocks and deposits that allows water to pass through them.
porous The ability of rocks and deposits to hold water.
precipitation The deposition of moisture on the Earth’s surface, in the form of dew,
frost, rain, hail, sleet or snow.

rising limb The part of a flood hydrograph that shows how quickly flood waters rise.
runoff The amount of water leaving a drainage basin; it includes overland flow,
throughflow and groundwater flow.
saltation A process of river transport by which small particles jump along the channel

soil erosion The removal of soil by wind and water and by the movement of soil

solution The process whereby rainwater, percolating groundwater and rivers dissolve
rock minerals.

streamflow The flow of surface water in a well-defined channel.
suspension The process whereby small particles are carried along in the body of a
stream or river.

throughflow The movement of water through rock and soil by percolation.
traction The transport of load along the bed of a river channel by rolling and sliding.
transpiration The loss of water vapour from a plant.
transport 1) The movement of load by wind, water and ice.
tributary A river which flows into another, usually a larger one.
water table The level below which the ground is saturated.
watershed The dividing line between one drainage basin and another.