Presentation on theme: "GROUND WATER. POINTS TO BE COVERED ON GROUND WATER 1.How does ground water move? What is porosity? permeability? Infiltration? 2.How is ground water formed?"— Presentation transcript:
POINTS TO BE COVERED ON GROUND WATER 1.How does ground water move? What is porosity? permeability? Infiltration? 2.How is ground water formed? 3. What is an aquifer, 4. Be able to discuss the use of wells in ground water, including potential problems.
ORIGIN OF GROUND WATER When precipitation falls on the land surface, what happens to it? Goes back into the H20 cycle, or is runs over land surface Afterwards, it infiltrates (Flow into) the land surface and percolates (seeps) downward and becomes ground water
GROUND WATER AS PART OF THE HYDROLOGIC CYCLE
GROUNDWATER When water passes through the sediment’s pores and is contain underground after reaching a surface that it cannot penetrate.
Porosity: amount of spacing in sediment material. Porosity depends upon: -shape of grains - arrangement of grains - size distribution - compaction HOW DOES GROUND WATER MOVE ? Permeability: ability of an material to allow the passage of H2O Depends upon - Porosity (spacing between sediment
WHAT IS AN AQUIFER? A permeable, water-containing unit. Area where groundwater is temporarily stored. Groundwater can leave by flowing to streams, springs, or to wells
WHAT ARE SOME OTHER PROBLEMS ASSOCIATED WITH THE USE OF WELLS? Lack of filtering in under privilege regions. Limited amounts of groundwater in some rock types. Runoff- pollution invasion.