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Surface Water Flows across Earth’s Surface Surface Water: Runoff • • • • Amount of rain Length of time it falls Slope of the land Amount of plants Rill Erosion Small streams form Gully Erosion Sheet Erosion • Sheets of water move over the land Stream Erosion Mississippi Drainage Basin • Largest basin in the U.S. Stream Development • Flows swiftly • Has waterfalls • Erodes on the bottom OLD Stream • Flows slowly through floodplain • Erodes on Sides • Meanders form • Broad floodplains Flooding - Rivers Overflow Dams Levees Deltas & Alluvial Fans Ground Water Permeability Aquifer Water Table Artesian Well Springs & Geysers Caves Sinkhole Rocky Shorelines Sandy Shorelines Beach Renourishment LongshoreCurrents Shore Zone Features