main features of aquifers
- Created by: Luke Mitchell
- Created on: 16-01-13 19:02
View mindmap
- Main features of aquifers
- Porosity
- measure of the porosity of rock's volume that is space and so holding water
- Chalk, limestone and sandstone are porus rocks that often form aquifers
- Permeability
- measure of the ease with which fluids may flow through a rock because of the interconnections between spaces
- some materials e.g. clay have high porosity but the pores are too small for water too flow through easily
- Suitable geological structures
- rock below water-bearing rock must be impermeable to prevent escape of water.
- Granite and clay are suitable impermeable materials
- some of rock above must be permeable to allow recharge of aquifer with water from above.
- some aquifer are very large and the recharge of abstraction
- the water may be abstracted using a well, a borehole or may come to the surface naturally in springs
- Porosity
Comments
Report