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HYDROLOGY > LESSON 1 > Flashcards

LESSON 1 Flashcards

1
Q

the science, which deals with the occurrence, distribution and disposal of water on the planet earth; it is the science which deals with the various phases of the hydrologic cycle.

A

Hydrology

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2
Q

includes those segment of the very broad field of hydrology pertinent to the design and operation of engineering projects for the control and use of water.

A

Engineering Hydrology

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3
Q

TRUE OR FALSE. The hydrologic cycle has importance influence in a variety of fields agriculture, forestry, geography, economics, sociology, and political scene.

A

TRUE

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4
Q

the area of land draining in to a stream or a water course at a given location

A

catchment area/ drainage area/ drainage basin/ watershed

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5
Q

an artificial lake where water is stored.

A

reservoir

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6
Q

TRUE OR FALSE. Most reservoirs are formed by constructing dams across rivers.

A

TRUE

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7
Q

TRUE OR FALSE. A reservoir can also be formed from a natural lake whose outlet has been dammed to control the water level.

A

TRUE

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8
Q

The analysis that expresses over any time period, water input to an area must equal output and changes in storage

A

WATER BALANCE EQUATION

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9
Q

TRUE OR FALSE. The water balance equation observes the law of conservation of mass.

A

TRUE

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10
Q

TRUE OR FALSE. Water balance equation is also called continuity equation or conservation equation.

A

TRUEA

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11
Q

is a continuous process by which water is purified by evaporation and transported from the earth’s surface (including the oceans) to the atmosphere and back to the land and oceans.

A

Water Cycle

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12
Q

liquid and solid water particles that fall from clouds and reach the ground. These particles include drizzle, rain, snow, snow pellets, ice crystals, and hail.

A

Percipitation

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13
Q

When precipitation is produced when moist air is lifted as it moves over a mountain range, it is called

A

Orographic Percipitation

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14
Q

it is the conversion of water vapor into liquid droplets.

A

Condensation

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15
Q

TRUE OR FALSE. Rainfall intensity is defined as the ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period It is expressed in depth units per unit time, usually as mm per hour (mm/h)

A

TRUE

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16
Q

TRUE OR FALSE. In a cold front cold air and warm air masses are drawn simultaneously towards low pressure areas

A

FALSE. in a cold front, cold air mass drives out a warm air mass

17
Q

a small particle (as of dust) upon which water vapor condenses in the atmosphere.

A

condensation nucleus

18
Q

TRUE OR FALSE. Depth refers to the length of time rainfall occurs.

A

FALSE

19
Q

Which of the following is not used to compute the average rainfall over a basin or catchment area.

A

Double Mass Analysis Method

20
Q

TRUE OR FALSE. Isohyetal Analysis method assumes that rainfall at any point within the polygon is the same as that of the nearest gauge. For this method, all the gauges in and around the basin are considered.

A

FALSE

21
Q

TRUE OR FALSE. A warm front occurs at the leading edge of a warm air mass that is moving to replace a cooler air mass.

A

TRUE

22
Q

This type of precipitation is caused when two air masses of different temperatures meet, where one will rise over the other and create a front with clouds that produce heavy rains to follow shortly after.

A

Cyclonic

23
Q

it is a weather front or transition zone between two air masses (cold and warm), when neither air mass is advancing into the other.

A

stationary front

24
Q

TRUE OR FALSE. a self- recording rain- gauge records the daily rainfall

A

FALSE. RECORDS THE HOURLY RAINFALL

25
Q

This type of precipitation occurs due to natural rising of warm lighter air with vapors into the colder and denser region.

A

convective

26
Q

Mechanism for Formation of Precipitation that lift air mass to higher altitudes causing cooling of air

A

Lifting and Cooling

27
Q

Mechanism of Formation of Precipitation which converts water vapor into liquid droplet

A

condesation

28
Q

mechanism for formation of precipitation that involves growth of droplets is required if the liquid water

A

droplet formation

29
Q

defined as the ratio of the total amount of rain falling during a given period to the duration

A

rainfall intensity

30
Q

graphical representation of the distribution of rainfall intensity over time

A

hyetograph

31
Q

gauge that gives total rainfall occurred during particular time period

A

non-recording type rain-gauge

HYDROLOGY (1 decks)

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