TRUE/FALSE. Write \'T\' if the statement is true and \'F\' if the statement is f
ID: 154923 • Letter: T
Question
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 39) Tributaries are smaller streams which drain into larger rivers. 40) The gradient of streams is higher at headwaters than at the mouth of a river. 41) The longitudinal profile of most streams is an upwardly curving line. 42) The bed load of a stream is involves the largest grains in the stream. 42) 43) A narrow river usually runs faster than a wider one. 43) 44) At a river meander, erosion occurs on the outside part of the bend, and deposition occurs on the inside part of the bend. 44) 45) An alluvial fan can be found at the base level of rivers. 46) If the discharge of a river is constant and the river channel suddenly widens, then the velocity of the river will decrease. 47) A river in flood stage can erode and transport more sediment than the same river in normal flow. 48) Flash floods are most common on the floodplains of large meandering rivers. 49) Flash floods are usually of short duration and therefore not very dangerous. 50) Hydrographs are used to show the amount of water in the hydrologic cycle. 51) Virtually all areas of the U.S. have some risk of flooding. 52) One of the benefits of flooding is deposition of fertile soil. 53) Living near a dam is very safe because you will never have to worry about flooding. 54) Construction of levees can actually make floods worse in areas upstream and downstream from the construction. 55) Rivers normally stay in a state of dynamic equilibrium between their flow velocity, their gradient, and their cross-sectional area. 56) Paving over land decreases the amount of flooding because water can't soak into the soil. 57) Channelization is one of the more drastic solutions to flooding because it can cause the draining of wetlands, which can have a negative impact on the wildlife. 58) If you live on the 100 year floodplain, it means that you are guaranteed to have one large flood once every 100 years. 59) Insurance and building codes are two important ways that the government can protect property fro m disaster in a flood. 60) There are some places that have too high a flood risk for people to rebuild; these homes usually are better off abandoned. 61) During a flood, the safest place to be is behind a levee or floodwall. 62) After a flood, you should be sure to wash anything that has been in touch with river water.
Explanation / Answer
True - ( T )
False - ( F )
39) Tributaries are smaller streams which drain into larger rivers. ( T )
40) The gradient of streams is higher at headwaters than at the mouth of a river. ( T )
41) The longitudinal profile of most streams is an upwardly curving line. ( F )
42) The bed load of a stream is involves the largest grains in the stream. ( T )
43) A narrow river usually runs faster than a wider one. ( F )
44) At a river meander, erosion occurs on the outside part of the bend, and deposition occurs on the inside part of the bend. ( T )
45) An alluvial fan can be found at the base level of rivers. ( T )
46) If the discharge of a river is constant and the river channel suddenly widens, then the velocity of the river will decrease. ( T )
47) A river in flood stage can erode and transport more sediment than the same river in normal flow. ( T )
48) Flash floods are most common on the floodplains of large meandering rivers. ( T )
49) Flash floods are usually of short duration and therefore not very dangerous. ( F )
50) Hydrographs are used to show the amount of water in the hydrologic cycle. ( F )
(It shows the rate of discharge or flow of water in cubic meters or cubic feet per second at a specific point. )
51) Virtually all areas of the U.S. have some risk of flooding. ( T )
52) One of the benefits of flooding is deposition of fertile soil. ( T )
53) Living near a dam is very safe because you will never have to worry about flooding. ( F )
54) Construction of levees can actually make floods worse in areas upstream and downstream from the construction. ( T )
55) Rivers normally stay in a state of dynamic equilibrium between their flow velocity, their gradient, and their cross-sectional area. ( T )
56) Paving over land decreases the amount of flooding because water can't soak into the soil. ( F )
57) Channelization is one of the more drastic solutions to flooding because it can cause the draining of wetlands, which can have a negative impact on the wildlife. ( T )
58) If you live on the 100 year floodplain, it means that you are guaranteed to have one large flood once every 100 years. ( F )
59) Insurance and building codes are two important ways that the government can protect property from disaster in a flood. ( F )
60) There are some places that have too high a flood risk for people to rebuild; these homes usually are better off abandoned. ( T )
61) During a flood, the safest place to be is behind a levee or floodwall. ( F )
62) After a flood, you should be sure to wash anything that has been in touch with river water. ( T )
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