hidrogeoph 1 correct

8/4/2019 Hidrogeoph 1 Correct

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Chapter 1- Water Balance


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Hydrology : Study air, terjadi, distribusi, pergerakan, kimia air didunia

Hydrogeology : Membahas hubungan material geology dan prosesdengan air

Hydrauliques: teknik mengalirkan air dalam pipa, saluran, danau,dan sungai

Hydrogeophysics:( Aplikasi metoda geofisika untukhydrology)kuliah meliputi : nilai quantitative parameterhydrogeology parameter, pengukuran geof. dan proses

Beberapa Definisi


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Subsurfacewater-Flowing


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Water Table


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A general water balance equation is:

P = Q + E + S

where

P is precipitation

Q is runoffE is evapotranspiration

S is the change in storage (in soil or thebedrock

In hydrology, a water balance equation can be used to describes the flow of waterinand outof a system. A systemcan be one of several hydrological domains,such as a column of soil or a drainage basin.

Definisi WaterBalance


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Inflow=Outflow+ds

P = Q + E + S

GERP S

Beberapa TerminologyLain


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The different processes are as follows:Precipitation is condensed water vapor that falls to the Earth's surface. Most precipitationoccurs as rain, but also includes snow, hail, fog drip, graupel, and sleet.[1] Approximately505,000 km of water fall as precipitation each year, 398,000 km of it over the oceans.[2]Canopy interception is the precipitation that is intercepted by plant foliage and eventually

evaporates back to the atmosphere rather than falling to the ground.Snowmelt refers to the runoff produced by melting snow.

Runoff includes the variety of ways by which water moves across the land. This includes bothsurface runoff and channel runoff. As it flows, the water may infiltrate into the ground, evaporateinto the air, become stored in lakes or reservoirs, or be extracted for agricultural or other human

uses.Infiltration is the flow of water from the ground surface into the ground. Once infiltrated, the

water becomes soil moisture or groundwater.[3]Subsurface Flow is the flow of water underground, in the vadose zone and aquifers.

Subsurface water may return to the surface (eg. as a spring or by being pumped) or eventuallyseep into the oceans. Water returns to the land surface at lower elevation than where it

infiltrated, under the force of gravity or gravity induced pressures. Groundwater tends to moveslowly, and is replenished slowly, so it can remain in aquifers for thousands of years.

Evaporation is the transformation of water from liquid to gas phases as it moves from theground or bodies of water into the overlying atmosphere.[4] The source of energy for evaporation

is primarily solar radiation. Evaporation often implicitly includes transpiration from plants,though together they are specifically referred to as evapotranspiration. Total annual

evapotranspiration amounts to approximately 505,000 km of water, 434,000 km of whichevaporates from the oceans.[5]

Sublimation is the state change directly from solid water (snow or ice) to water vapor.[6]Advection is the movement of water in solid, liquid, or vapour states through the

atmosphere. Without advection, water that evaporated over the oceans could not precipitateover land.[7]

Condensation is the transformation of water vapour to liquid water droplets in the air, producingclouds and fog.[8]


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Precipitasimm

Infiltrasimm/time: Hortons formule:decay

Evaporation Evapotranspiration:forset:grass:70:35

Rainfall-Runoff:fac(slope+infilt)

time

Infil/rainf

f

Satured

WaterBalance


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Precipitasi:

Area

Analisa durasi

Freq

Intensitas

Nilai extreem

A dxxpAP ).(

11

A i

m

i

dxtxpAT

P ).,(11

11

Area Presipitasi


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Thiesen Polygon:Areal Precipitation

Catchment

2

1

Raingauge


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30

40

50

Area

Arealrain

Precipitation Depth

IsohyetTotal areaarea intraisohyetaverageisohyetvolumeCumm volAreal rain

hidrogeoph 1 correct

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