Deposition and Floods Earth Science Chapter 5 Pages 128 135 Deposition SLOWING OF VELOCITY Decrease in gradient Decrease in discharge Loss of channelization Flood stage Body of water Deposition Flows into a body of water Creates delta Delta Formation Deposition decreases gradient Flood stage gets out of its deposit Delta Formation Flood stage gets out of its deposit Forms set of DISTRIBUTARIES Delta Formation Forms set of DISTRIBUTARIES Mississippi Delta Deposition SLOWING OF VELOCITY Loss of channelization Body of water Flood stage Stream Processes and Floodplain Development Natural Levee Formation Stream Processes and Floodplain Development Natural Levee Formation Natural Levee Creation Competence lost when stream leaves its channel Deposits largest particles first http www ucpress edu books pages 6664 6664 ch04 html Natural Levees Natural Levees Yazoo River http www mvk usace army mil offices pp yazoobackwater basics asp category basics Alluvial Fan http wiseman brandonu ca earthscience newpage35 htm Alluvial Fan Badwater Fan Death Valley California http www windows ucar edu earth geology images alluvial fan lg jpeg Drainage Patterns Channel layout within a drainage basin Described by overall shape formed Dentritic Radial Rectangular Trellis Flash Flood Dry stream with sudden rainfall upstream Impermeable surfaces prohibit infiltration vs Slow Flood Protracted rainfall Saturated soil Bankful discharge Rio Salado most days http www fws gov bhg images dryrio jpg Rio Salado after upstream thunderstorm http www fws gov bhg images Puebloriaprian jpg Willamette 1996 http www westernrivers org camp or willamette html Willamette 1996 http www bpa gov Power pl columbia gallery 96flood1 jpg Mississippi usually Mississippi summer 1993 Levee break in 1993 http home4u hongkong com technology pc mkchoi flood html Ancient Lake Missoula http www fs fed us r6 columbia forest geology index shtml Flood area of Lake Missoula http www fs fed us r6 columbia forest geology index shtml Actual photograph of Missoula Flood http www bpa gov Power pl columbia 4 geology htm Portland today http www fs fed us r6 columbia forest geology index shtml Portland then http www fs fed us r6 columbia forest geology index shtml Dry Falls of Missoula Flood http pbisotopes ess sunysb edu classes oldclasses geo320 520 student webs regulinski Channeled Scablands of Missoula Flood http pbisotopes ess sunysb edu classes oldclasses geo320 520 student webs regulinski Drainage Basins Area that drains into a stream Separated by drainage divides Drainage Divide http earth geol ksu edu sgao g100tu plots 1107 03 model drainage jpg Drainage Basin http www mhhe com earthsci geology mcconnell streams drainage htm Colorado Drainage Basin http earth geol ksu edu sgao g100tu plots 1 107 04 drainage basin co river jpg Calif Drainage Basin Sacramento and San Joaquin Rivers http www delta ca gov econrpt html Mississippi Drainage Basin Sub basin of Mississippi http www mhhe com earthsci geology mcconnell streams drainage htm Sub basins of Ohio River http www mhhe com earthsc i geology mcconnell streams drainage htm Sub basin of drainage basin Can be delineated along divides as visible on topographic maps http www physicalgeography net fundamentals 10aa html
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