Interception on trees, impermeable surfaces Infiltration into soil Interflow downslope along B horizon Overland flow during heavy rain Recharge reaches.

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Presentation transcript:

Interception on trees, impermeable surfaces Infiltration into soil Interflow downslope along B horizon Overland flow during heavy rain Recharge reaches the water table Groundwater flow from recharge area to stream Water table rises Evaporation removes intercepted water Evapotranspiration (ET) from plants removes water from soil Baseflow to streams depletes water in aquifer Hydrologic Cycle Baseflow and ET continue until next rainfall Rainfall Aquifer Vadose zone Soil B horizon Stream water table Rain stops Overland + Interflow = Stormflow. Stream level rises

Hydrogeologic Regions Geologic controls on –Porosity and hydraulic conductivity –Layering, structure, and aquifer type –Water chemistry –Well yield

Hydro- geology of the Southeast FloridanLimestone Appalachian Sedimentary Rock Limestone Piedmont Crystalline rock Coastal Plain Sand + clay Ground Water Atlas

Fractured crystalline rock

Transition Fractured metamorphic and igneous rock K: m/s T: m 2 /day S: Saprolite: K: m/s S:

Hydrogeologic Conceptual Model R: 0.2 m/yr

Fractured Rock Aquifers in Piedmont K: m/sbulk fractured rock Compare to to m/s for intact samples T: m 2 /day Recharge: m/yr Well Yield: gpm

Atlantic Coastal Plain

Coastal Plain Santee River Delta

Sand and clay

clay Sand Columbia Myrtle Beach Atlantic Coastal Plain

Flowing wells Edwards Aquifer, San Antonio, Texas Roswell Basin, NM, 3600 gpm

Coastal Plain Clastic Aquifers T: ,000 m 2 /day Recharge: m/yr Well Yield: gpm

Floridan Aquifer FloridanLimestone Appalachian Sedimentary Rock Limestone Piedmont Crystalline rock Coastal Plain Sand + clay Ground Water Atlas

Floridan Limestone Aquifer

Dissolution Cave stream

Limestone aquifer

Floridan Aquifer T: ,000 m 2 /day Recharge: m/yr Well Yield: ,000 gpm

Comparison of SE Regions RegionT (m 2 /day)Recharge (m/yr) Qwell (gpm) Piedmont Coastal Plain Clastic , Floridan Limestone 1, , ,000