Chapter 13

* Weathering and Mass Wasting
* Geomorphology-landform science and in this case we’re talking about weathering
* Uplift in the geomorphic cycle begins process event:

o Adjustment
o New equilibrium
o Event

* Slopeàexposed material to transport and erosion
* Hard rockàbiggeràsmaller
* To make the slope stable-or-Read Angle and Repose by Wallace Stegner
* Weathering can be physical, mechanical or chemical

o Organic, roots
o Frozen, joints
o Exfoliation

* Physical
* Chemical-oxidation, carbonation, Karst landscapes caves
* Mass wasting-Show slide:

o Avalanches
o Landslides
o Slips-flows
o Solification-creep

* Man-made mistakes
* Exogenic force
* Fluvial-stream-river related processes, patterns, prediction
* Gravity and isolation

o Erosion
o Transport
o Deposition
o Sorted
o Alluvium

* Base level-cannot erode lower

o Local
o Ultimate

* Drainage levels-divides, defines a watershed
* Continental divide-med, pac, gulf of mexico, atlantic
* See example in book of Pa rivers going to Gulf of Mexico or to Atlantic

o Sediment feeds delta
o Key for Mississippi and hurricane issues

* Stream discharge leeked to evaporation rate, i.e. Nile
* Colorado River fails to reach basin
* Sediment off stream
* Still waters run deep, shallow riffles run fast
* Suspended load-physical
* Dissolved load-chemical
* Gradient-down-hill slope
* Deposits = point bar
* Meanders, under cuts, ox bow
* Braided streams-glacial
* Flood plains-100 year flood-Mississippi Delta
* Deposition
* Levee
* Sinking Delta
* Barrier Islands
* Flood Insuarance-Oachin delta and levee system failure
* Read Chapter 16

Chapter 14

* River systems-hydrology
* Fluvial-geomorphology
* How does a stream bed form
* Drainage-how much land/water covered
* A vast network-arterian system

o Rivers, streams
o Deocribe and enocribe
o The landform base under the H2O

* Watersheds-drainage portion of a creek, stream, river-shapes the land
* Gradient-ultimate base level
* Load-deposits-weight-isostatic,

o Sinking delta, starved without sediments and lack of vegetation

* Floodplain- Ch.19 608-628
* Amazon, Congo, Yangtze, Mississippi