ELLS - River Kennet Flashcards
Aquifer
1
Q
what is an aquifer
A
a geological layer of porous and permeable material. E.g limestone
2
Q
location
A
south of England
3
Q
drainage area
A
1200km^2
4
Q
what is the largest urban settlement it extracts water to (supplies)
A
Swindon (200,000 people)
5
Q
what is the effects of water extraction exceeding rates of recharge
A
water table has fallen and has reduced water flows in the river by 10-14 percent
6
Q
effects of water extraction on surrounding land
A
less water in flood plains
causes springs and seepages to dry so this reduces overland flow
7
Q
how did dry periods exacerbate falling water table and reduced flows
A
it exacerbated it by 40% 1990s and 2003 by 20%
