m2
問題一覧
1
It refers to all water occurring beneath the earth's surface, including soil moisture.
Groundwater
2
Because of the weight of the overlying groundwater, the fluid pressure in the phreatic zone is greater than the atmospheric pressure.
True
3
The primary function of a well screen is to allow water to enter the well while preventing the entry of sediment, debris, and larger particles.
True
4
For 1600000 hectares of land area, 1000 gauges is required if based on area only.
True
5
When mountains of higher altitude act as barriers to air flow, forcing the air to ascend, moist air moving upslope cools adiabatically, producing evaporation in the atmosphere.
False
6
Vadose Zone includes the surface soil, unsaturated sub-surface soil including weathered and unweathered material, and the capillary fringe.
True
7
The boundary between the unsaturated zone and the saturated zone underground.
Water Table
8
Percolation is known to be the primary surface entry of water.
False
9
Precipitation gage density is generally less for flat regions than for mountainous regions in temperature climates.
True
10
A pitless adapter is a tubular structure, typically made of steel or plastic, that lines the wellbore from the surface to the desired depth.
True
11
If people drill a well into an unconfined aquifer, they have to install a pump to push water to the surface.
True
12
It is a line on a map which connects points that have the same amounts or value of rainfall in a given period or for a particular storm.
Isohyets
13
In 1989, Freeze and Cherry describe an aquitard as the less permeable beds in a stratigraphic sequence.
False
14
Due to their typical proximity to the Earth's surface, water table aquifers are affected by drought conditions earlier than confined aquifers.
True
15
By nature, gravel has a relatively low porosity and high permeability so they yield less water than clay.
False
16
Solve the missing storm precipitation of station 'C' given the data below.
7.8 cm
17
A certain rainfall station was broken for part of a month during which a storm occurred. The storm totals at three surrounding stations X, Y and Z were respectively 10.7, 8.9 and 12.2 cm The normal annual precipitation amounts at stations P, X, Y and Z are respectively 97.8, 112, 93.5 and 119.9 cm. Using the Normal ratio method, the missing rainfall data is 10.57 cm.
False
18
Aquifuge contains a large amount of water in it but it does not permit water through it and also does not yield water.
True
19
Groundwater flows from positions of low hydraulic head to positions of high-water head.
False
20
Only 0.98% of all the water on Earth is fresh groundwater.
False
21
Arithmetic Average Method can be used given that one adjacent data differs by less than 10% of the difference between the average annual precipitation and the other two differs by more than 10%.
False
22
A hydrogeologic unit which has no interconnected openings and cannot store or transmit water.
Aquifuge
23
Piezometers are used to measure underground water pressure. It converts water pressure to a frequency signal via a diaphragm and a tensioned steel wire.
True
24
An artesian well requires a pump to bring water to the surface; this occurs when there is enough pressure in the aquifer.
False
25
Layers of soil that have low permeability allow water to move more freely between the pore spaces.
False
26
Permeability refers to the amount of open space in the material.
False
27
A subsurface zone of soil or rock in which all pores and interstices are filled with fluid.
Phreatic Zone
28
In an unconfined aquifer, it is the water level in a well when the pump is not operating.
Static Water Level
29
Thiessen Polygon method can include orographic effects and storm morphology and the most basic method of representing the
spatial distribution.
False
30
The downward movement of water through the soil itself.
Percolation
31
The cap is a tube in the ground that houses the well pump and the pipe that moves water from the pump to the surface.
False
32
The process by which water on the ground surface primarily enters the soil.
Infiltration
33
A body of rock or sediment that is completely saturated – water is in it and all around it. It can be made of sand, gravel, sandstone, or other rocks that store and transmit water.
Aquifer
34
Aquitard contains a large amount of water in it but it does not permit water through it and also does not yield water.
False
35
A drop pipe provides a conduit for water to be drawn from the well and delivered to the pump for further extraction and distribution.
True
36
In the saturated zone, there usually is at least a little water, mostly in smaller openings of the soil and rock; the larger openings usually contain air instead of water.
False
37
The most common type of pump is a jet pump which is located above the ground.
True
38
In the year 1987, the station P was broken and the stations x, y, and z recorded annual rainfall of 91.11, 72.23, and 89.89 cm, respectively. Estimate the rainfall at station P in that year. Express your answer in inches given that the normal annual precipitation at stations x, y, z and P in a basin are 80.97, 67.59, 76.28, and 92.01 cm, respectively.
40.72
39
The main difference between infiltration and percolation is that infiltration occurs in the topmost zone of soil whereas percolation occurs when water passes through soil and rock.
True
40
Groundwater enters an aquifer as precipitation seeps through the soil and can be extracted using a water well.
True
41
The volume of water released from storage per unit volume of earth material in the cone of depression in an unconfined aquifer is smaller compared to the volume of water released by dewatering of the earth materials in a confined aquifer.
False
42
A type of aquifer that have layers of rock above and below it that are not very permeable to water.
Confined Aquifers
問題一覧
1
It refers to all water occurring beneath the earth's surface, including soil moisture.
Groundwater
2
Because of the weight of the overlying groundwater, the fluid pressure in the phreatic zone is greater than the atmospheric pressure.
True
3
The primary function of a well screen is to allow water to enter the well while preventing the entry of sediment, debris, and larger particles.
True
4
For 1600000 hectares of land area, 1000 gauges is required if based on area only.
True
5
When mountains of higher altitude act as barriers to air flow, forcing the air to ascend, moist air moving upslope cools adiabatically, producing evaporation in the atmosphere.
False
6
Vadose Zone includes the surface soil, unsaturated sub-surface soil including weathered and unweathered material, and the capillary fringe.
True
7
The boundary between the unsaturated zone and the saturated zone underground.
Water Table
8
Percolation is known to be the primary surface entry of water.
False
9
Precipitation gage density is generally less for flat regions than for mountainous regions in temperature climates.
True
10
A pitless adapter is a tubular structure, typically made of steel or plastic, that lines the wellbore from the surface to the desired depth.
True
11
If people drill a well into an unconfined aquifer, they have to install a pump to push water to the surface.
True
12
It is a line on a map which connects points that have the same amounts or value of rainfall in a given period or for a particular storm.
Isohyets
13
In 1989, Freeze and Cherry describe an aquitard as the less permeable beds in a stratigraphic sequence.
False
14
Due to their typical proximity to the Earth's surface, water table aquifers are affected by drought conditions earlier than confined aquifers.
True
15
By nature, gravel has a relatively low porosity and high permeability so they yield less water than clay.
False
16
Solve the missing storm precipitation of station 'C' given the data below.
7.8 cm
17
A certain rainfall station was broken for part of a month during which a storm occurred. The storm totals at three surrounding stations X, Y and Z were respectively 10.7, 8.9 and 12.2 cm The normal annual precipitation amounts at stations P, X, Y and Z are respectively 97.8, 112, 93.5 and 119.9 cm. Using the Normal ratio method, the missing rainfall data is 10.57 cm.
False
18
Aquifuge contains a large amount of water in it but it does not permit water through it and also does not yield water.
True
19
Groundwater flows from positions of low hydraulic head to positions of high-water head.
False
20
Only 0.98% of all the water on Earth is fresh groundwater.
False
21
Arithmetic Average Method can be used given that one adjacent data differs by less than 10% of the difference between the average annual precipitation and the other two differs by more than 10%.
False
22
A hydrogeologic unit which has no interconnected openings and cannot store or transmit water.
Aquifuge
23
Piezometers are used to measure underground water pressure. It converts water pressure to a frequency signal via a diaphragm and a tensioned steel wire.
True
24
An artesian well requires a pump to bring water to the surface; this occurs when there is enough pressure in the aquifer.
False
25
Layers of soil that have low permeability allow water to move more freely between the pore spaces.
False
26
Permeability refers to the amount of open space in the material.
False
27
A subsurface zone of soil or rock in which all pores and interstices are filled with fluid.
Phreatic Zone
28
In an unconfined aquifer, it is the water level in a well when the pump is not operating.
Static Water Level
29
Thiessen Polygon method can include orographic effects and storm morphology and the most basic method of representing the
spatial distribution.
False
30
The downward movement of water through the soil itself.
Percolation
31
The cap is a tube in the ground that houses the well pump and the pipe that moves water from the pump to the surface.
False
32
The process by which water on the ground surface primarily enters the soil.
Infiltration
33
A body of rock or sediment that is completely saturated – water is in it and all around it. It can be made of sand, gravel, sandstone, or other rocks that store and transmit water.
Aquifer
34
Aquitard contains a large amount of water in it but it does not permit water through it and also does not yield water.
False
35
A drop pipe provides a conduit for water to be drawn from the well and delivered to the pump for further extraction and distribution.
True
36
In the saturated zone, there usually is at least a little water, mostly in smaller openings of the soil and rock; the larger openings usually contain air instead of water.
False
37
The most common type of pump is a jet pump which is located above the ground.
True
38
In the year 1987, the station P was broken and the stations x, y, and z recorded annual rainfall of 91.11, 72.23, and 89.89 cm, respectively. Estimate the rainfall at station P in that year. Express your answer in inches given that the normal annual precipitation at stations x, y, z and P in a basin are 80.97, 67.59, 76.28, and 92.01 cm, respectively.
40.72
39
The main difference between infiltration and percolation is that infiltration occurs in the topmost zone of soil whereas percolation occurs when water passes through soil and rock.
True
40
Groundwater enters an aquifer as precipitation seeps through the soil and can be extracted using a water well.
True
41
The volume of water released from storage per unit volume of earth material in the cone of depression in an unconfined aquifer is smaller compared to the volume of water released by dewatering of the earth materials in a confined aquifer.
False
42
A type of aquifer that have layers of rock above and below it that are not very permeable to water.
Confined Aquifers