hydrogeology 1stweek(lecture note)
TRANSCRIPT
Chapter 1.
Water
Hydrology is study of water.
Hydrogeology encompasses the interrelationships of geologic materials and processes
with water.
Only a small percentage of the world’s
total water supply is available to human
s as fresh water..
The Hydrologic Cycle
Chapter 1.
Water
Hydrology is study of water.
Hydrogeology encompasses the interrelationships of geologic materials and processes
with water.
Only a small percentage of the world’s
total water supply is available to human
s as fresh water..
The Hydrologic Cycle
Chapter 1.
Water
Hydrology is study of water.
Hydrogeology encompasses the interrelationships of geologic materials and processes
with water.
Only a small percentage of the world’s
total water supply is available to human
s as fresh water..
The Hydrologic Cycle
The Hydrologic cycle begins with water from the oceans, the cycle actually has no
beginning and no end.
Some water may be temporarily stored on the land surface as ice and snow or water in
puddles. Which is known as depression storage.
Overland flow means that the water flows across the land to a stream by rain or etc.
Infiltration means that if the surface soil is porous, some rain or melting snow will seep
into or go into the ground.
Below the land surface the soil pores contain both air and water. The region is known as
the vadose zone or zone of aeration.
As the plant uses the water, it is Transpired as vapor to the atmosphere.
Under some conditions water can flow laterally in the vadose zone, a process known as
interflow.
Excess vadose water is pulled downward by gravity, a process known as gravity like a
sponge, a process Known as gravity drainage(중력 배수).
The capillary fringe is like a capillary vessel (모세혈관)
Zone of saturation is called the water table
Ground water, Ground-water flow
The ground-water contribution to a stream is termed baseflow, while the total flow in a
While the total flow in a stream is runoff.
Water stored in ponds, lakes, rivers, and streams is called surface water
Transpiration by plants and evaporation from land surfaces are lumped together as
evapotranspiration.
Calorie (14.5->15.5 로 올리는 열량=4.2J)
The latent heat of vaporization Hv, in calories per gram of water, can be found by
TH v 564.03.597 -=
Chapter 2
Elements of the Hydrologic Cycle
The absolute humidity of a given air mass is the number of grams of water
per cubic meter of air
절대 습도란 단위 부피당 수증기량으로, 1m3의 부피속에 들어 있는 수증기 양을 g수로
나타낸 것 (g/m3)
절대습도는 공기중의 수증기량만 관계있고, 온도랑은 관계가 없다. 수증기량이 많을 수
록 절대습도가 커집니다.
The relative humidity for an air mass is the percent ratio of the absolute humidity
To the saturation humidity for the temperature of the air mass
상대습도란 현재 온도에서 포화수증기압에 대한 현재 수증기압의 비를 백분율(%)로 나타
낸 것입니다.
When an air mass is cooled and the saturation humidity value drops, condensation
occurs as the air mass can no longer hold all of its humidity.(응결)
The dew point for an air mass is the temperature at which condensation will begin.(이슬
점)
Free-water evaporation is measured quite simply by using shallow pans. The most
commonly used is the land pan.
Nomograph used to
Determine the value of
daily lake evaporation for
shallow lakes.
Diagram of potential and
actual evaportranspiration
in an are with fine soils
with ample soil-moisture
storage, warm summers,
cool winters, and little
seasonal change in
precipitation
è Conture line 그리기 어렵고,
객관화 하기 힘든 면 등이 있어 Tissen
Net 사용하는 거임
Nomograph used to
Determine the value of
daily lake evaporation for
shallow lakes.
Diagram of potential and
actual evaportranspiration
in an are with fine soils
with ample soil-moisture
storage, warm summers,
cool winters, and little
seasonal change in
precipitation
è Conture line 그리기 어렵고,
객관화 하기 힘든 면 등이 있어 Tissen
Net 사용하는 거임
Nomograph used to
Determine the value of
daily lake evaporation for
shallow lakes.
Diagram of potential and
actual evaportranspiration
in an are with fine soils
with ample soil-moisture
storage, warm summers,
cool winters, and little
seasonal change in
precipitation
è Conture line 그리기 어렵고,
객관화 하기 힘든 면 등이 있어 Tissen
Net 사용하는 거임