Direct vs. Indirect Water Usage Direct Drinking water Shower Watering your lawn Indirect Food Clothes

Groundwater – What and Why? What? Infiltrated water Major source for Consumption Irrigation Surface water (streams, etc.)

What happens underground? Where it goes is changed by Porosity Permeability Underground Aerated zone Saturated zone Water table Aquifer

Groundwater moves Due to gravity Impacted by porosity and permeability Not a straight line Discharge vs. recharge Cones of depression Caused by wells Move to lowest point Change the water table Need to drill new wells Land subsidence

Ogallala Aquifer Where? Why is it significant? Much higher discharge Land subsidence Loss of drinking water Loss of water for irrigation Saltwater intrusion

Daily Review #2 6. What two factors affect groundwater? 7. How does the pumping out of water in a well effect the water table and why? 8. What is the Ogallala Aquifer and why is it important? 9. What do discharge and recharge mean? End

Surface Water Lakes, rivers, streams, etc. From precipitation Runoff Infiltration, eventually Watershed or Drainage Basin Divides Headwaters Colorado is a headwater state

Streams (Rivers) Definition Groundwater meets surface and runoff Flow downhill Carries sediment Faster water = larger sediment Agent of erosion Tributaries Creeks

Landforms made by Erosion Stream channel Meander Ox bow lakes

V-shaped valley Waterfalls Deltas Floodplain Good farmland

Urban Water Extraction Groundwater Decreased infiltration Surface water Water rights Distribution Treatment Filtering Biological agents Sludge disposal Reuse Use of grey water