Geomorphology Weekly Notes 4-1.htm
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!-- Created from PDF via Acrobat SaveAsXML --> <!-- Mapping table version: 28-February-2003 --> <HTML> <HEAD> <META name="dc.title" content="4-1" > <META name="dc.date" content="2009-08-13T10:24:56-04:00" > <META name="dc.date.modified" content="2009-08-13T10:24:59-04:00" > <META name="generator" content="Adobe Acrobat Exchange-Pro 7.8" > </HEAD> <BODY bgcolor=white text=black link=blue vlink=purple alink=fushia > <DIV class="Sect" ><DIV ><P align="justify" ><FONT size="+1" color="#000000"></B>4-1</P ><P align="justify" >Fluvial Process - What Rivers do & pre conditioning<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Ie: mass wasting and weathering<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Rain, Rivers, Weather & Water. Davis - New England basis<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Infiltration - duration & intensity<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Previous condition (vegetation, soil, slope, etc)<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Saturation Overland Flow - All spaces filled<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Surface layer filled - Overland flow<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">New Orleans & Texas - Katrina<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Hortonian Overland flow has much sediment<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Through flow a interflow is seepage generated<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Large pressure of ground water running down slope<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Turbulent vs. laminar flow<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Sheet flow surface H20 & sediment<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">rill - small channel downhill<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Piping ability to remove sediment by seepage<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Sapping is lowering of springs (surface/h2o otable)<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Gully - deeper and steeper than rill<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Branching channels (first step in cutting landscapes)<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Soil Erosion - RUSLE = A = RUSLE<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">A= Predicted soil loss<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">R= Climate erosion Rainfall and Runoff<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">K= Soil erosion factor<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">L= Slope Length<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">S= Slope gradient<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">C= Cover & Management Practices<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">P= Erosion Control<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">R= Effect of rainfall & erosion (local differences)<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">K= Actual vs. standard loss of soil<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">L +S= Topographic factors<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">C= Row Crops vs. Bunch Crops<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">P= Mgt- Paddy, Contour, intercropping<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">5/A Max to Sustain viable soil and Intermittent vs. permanent flow vs. flood stage<FONT size="+1"> </P ></DIV ><DIV ><P align="left" ><FONT size="+1">Discharge - <U>Volume H20 </U> t<FONT size="+1"> </P ><P align="justify" ><FONT size="+1">Q==wdv<FONT size="+1"> </P ></DIV ><DIV ><P align="justify" ><FONT size="+1">Cross Section Flow</P ></DIV ></DIV ></BODY> </HTML>
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rsadoo. (Aug 17, 2009). Geomorphology Weekly Notes 4-1.htm. Retrieved Nov 06, 2014, from UMass Boston OpenCourseware Web site: http://ocw.umb.edu/environmental-earth-and-ocean-sciences/eeos-302-geomorphology/Geomorphology%20Weekly%20Notes%204-1.htm.