Download - river watershed floodplain
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RIVER Nur Aisyah Putri Yella Apriliana
sadiyah
Dwi RahayuSetyawati Rani Fitriani Karina Noveandra Hilma Muthiah Windi Novita Rizky
Erisa MarettaSilaban
Alifa Istiyani
Nurul Annisa Zikri Danar Aji Rizki Tri
Elis Listiani
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Type And Characteristics
River
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Based on the source of the river water canbe divided into three kinds
Rainy River Glacier River Mixed River
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Based on the water discharge according tothe river is divided into three kinds
Permanent River Periodic River Episodic River
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Based on the origin of events (genetics)the river is divided into 5 types
Consequent River Subsequent or strike the river valley Obsekuen River Resekuen River
Insekuen River
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Based on the geological structure of theriver is divided into two kinds
Antecedents River Superposed River
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Based on the flow pattern of theriver is divided into 6 types
Radial or menjari Dendritic Trellis Rectangular
Pinate Annular
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Watershed
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Definition
A watershed, also called a "drainagebasin" in North America, is an area in
which all water flowing into it goes to acommon outlet, such as the same estuary
or reservoir.
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The water in a watershed originatesvia precipitation that is collected on the
surface and groundwater.The area of watershed can be determined
with measure that area in topography
map. The area of watershed is reallyinfluence to river discharge.
http://geography.about.com/od/physicalgeography/a/hydrologiccycle.htmhttp://geography.about.com/od/physicalgeography/a/hydrologiccycle.htm -
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Types of Watersheds
Gemuk Watershed
Kurus Watershed
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Component of watershed
Physical Condition Human
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Human Impacts on Watersheds
Polution Reduce the amount of water flowing to
it
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Preventing of damaged watershed
Do not deforesting / plants in thewatershed areas
Do not building in the area of thewatershed as a residential or otherpurposes.
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Watershed Management andRestoration
Watershed management is the organization andplanning of human activities on a watershed andrecognizes the links between these activities and
the watershed's health.Watershed restoration on the other hand is
aimed at restoring already impacted watershedsto their natural state through the monitoring of
pollution and regulations to reduce further
pollution.
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FLOODPLAIN
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Definition
Floodplain is the area around the river which hasa surface elevation of land under flood water
level in the 50 year return period.Condition of the land in the region is generally
fertile flood plains and store a variety of potential
and accessibility, so as to have a high power ofdance to be cultivated and shelter, business
center and other economic activities.
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Flood and sedimentation
Generally floodplainsediment is dominatedby sediments such as
silt and mudsuspension, although
sometimes appears finesandstones deposited
by strong currents
during the flood peak.
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Point bar deposits
The precipitate which occurred at the peakof the curve called a point bar.
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Here are some of the functions ofthe river for human life, including:
Sources of Drinking Water and Water Supply As an Electrical As Transport Line As The Fresh water Fish Farming, Shrimp, and
Crab As aplace of recreation and tourism As the Sports Turf
As Exploration Place Science and Research
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Measuring Flow Velocity andDischarge
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The discharge measurementQ=AV
Which,Discharge (Q)
Area (A)Mean flow velocity (V).
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Flow velocity is measuredwith a current meter .
A plot of flow velocity versus depth offlow is called the velocity
profile. Velocity varies with depth in anon-line armanner so the averagevelocity for the subsection is not atmid-
depth (0.5d) but rather at 0.6 d fromthe water surface
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So if you want to determine theaverage velocity at a vertical, a single
measurement can be taken at 3/5 ofthe depth from the water surface