10 Ground Water

10 Ground Water - (J) Ground Water Ground water is the...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
(J) Ground Water Ground water is the largest reservoir of unfrozen fresh water on earth Zones of subsurface water: - Zone of saturation Zone of saturated rock or soil immediately above the impermeable material; all voids filled with water Zone of aeration Zone of rock or soil in which the pore spaces are filled partly with water and partly with air Water table is defined as the top of the zone of saturation, where the saturated zone is not confined by overlying impermeable rocks Precipitation is the source of ground water, and the rate of infiltration/seepage depends on: - Slope of the ground Vegetation cover Climatic factors, e.g. temperature, humidity, wind Soil texture Human interference, e.g. the construction of dams and reservoirs, urbanization Physical properties of geological materials may also govern the infiltration rates: - Porosity Permeability Proportion of void space in the material Depends on the shapes of mineral grains or rock fragments
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/26/2011 for the course CIVIL CIVL taught by Professor Wong during the Spring '11 term at HKU.

Page1 / 2

10 Ground Water - (J) Ground Water Ground water is the...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online