1 / 7

Groundwater

Groundwater. A. Hydrosphere. Hydrosphere – all of the water on and in Earth’s crust 97% oceans 3% freshwater 79% in polar ice caps, glaciers Most of the rest is groundwater. The oceans are the ultimate source of water for land Evaporation -> cloud formation -> precipitation

kamali
Download Presentation

Groundwater

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Groundwater

  2. A. Hydrosphere Hydrosphere – all of the water on and in Earth’s crust • 97% oceans • 3% freshwater • 79% in polar ice caps, glaciers • Most of the rest is groundwater

  3. The oceans are the ultimate source of water for land • Evaporation -> cloud formation -> precipitation • MOST precip. on land infiltrates the ground & becomes groundwater • Small portions become runoff

  4. B. Where does groundwater go? 1. Infiltrates through porous Earth material 2. Stored in pore spaces of rocks and sediments a. Zone of aeration – above the water table, pores contain mostly air b. Water table – upper boundary of zone of saturation c. Zone of saturation – depth where all pores are filled with water

  5. 3. Water table level varies • Wet season = higher water table (closer to surface) • Drought = lower

  6. 4. Aquifers • permeable layer of material through which groundwater flows • Permeability – ability of a material to let water pass through a. Sand & gravel = high permeability b. Fine-grained materials (clay) = lowpermeability

More Related