首页
登录
职称英语
Mudslide and PreventionVocabulary and Expressionsdebris flow topography
Mudslide and PreventionVocabulary and Expressionsdebris flow topography
游客
2023-12-29
44
管理
问题
Mudslide and Prevention
Vocabulary and Expressions
debris flow topography armor scallop
landslide disturbance roadcut terrain
saturate drain ... Off [br] There isn’t terrain there that landslides could have happened to.
Mudslide and Prevention
What is a mudslide? A mudslide, also called a debris flow, is a type of fast-moving landslide that follows a channel, such as a river. A landslide, in turn, is simply when rock, earth, or other debris moves down a slope.
Mudslides occur after water rapidly saturates the ground on a slope, such as during a heavy rainfall. According to O’Connor, it doesn’t take high relief in the topography to create a slide.
Rather, it just takes a pull of gravity strong enough to bring down material that is made fluid enough by water.
Mudslides tend to happen during wet seasons, says O’Connor. For the Pacific Northwest, that’s generally during winter or spring.
Mudslides are also often triggered by earthquakes or by disturbances in hillsides caused by fires or human activity.
In the United States, mudslides and landslides result in an average of 25 to 50 deaths a year, according to the Centers for Disease Control and Prevention (CDC).
How are mudslides prevented?
Strategies to decrease the risk of mudslides include draining water off hillsides, armoring the bases of hills so they are not undercut by rivers, and "loading the toe," says O’Connor. In the case of " loading the toe," engineers put heavy mass, such as large rocks, at the base of a hill to try to anchor the slope and prevent it from coming loose.
O’Connor says the piles of rock that are often seen at the base of roadcuts are the most visible example of that strategy.
O’Connor adds that when it comes to the Stillaguamish River area, the valley is scalloped with the evidence of many past slides.
"This isn’t a situation where the authorities should have done something to prevent it because there is so much terrain there that this could have happened to," he says.
The CDC recommends that people exercise caution around steep slopes during rainfall. Immediate signs of a pending slide include tilting trees and sudden increases or decreases in rivers.
选项
A、正确
B、错误
答案
B
解析
该表述是对原文“…there is so much terrain…”的相反表述,故本题错误。
转载请注明原文地址:https://tihaiku.com/zcyy/3315172.html
相关试题推荐
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[originaltext]Ji
随机试题
SomehowCaliforniaisalwaysatthecuttingedge,beitintheflower-power
[originaltext]W:Hi,Bob.Howisyouroralpresentationcomingalong?M:Whato
SellingaCarHowlonghaveyoubeendrivingaroundinth
SE序列相位重聚是指:A.90°脉冲激励时 B.90°脉冲激励后 C.180
举办大型群众性活动应当符合下列哪些条件()A.具有符合本条例规定的安全工作
下列关于药师调剂处方时必须做到的“四查十对”正确的是A.查处方,对科别、姓名、年
为了坚持、扩大和巩固抗日民族统一战线.中国共产党制定的策略总方针是( ) A
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
关于金融监管体制的说法,错误的是()。A.德国实行的是独立于中央银行的综合监管
企业进行筹资时,首先应利用发行普通股筹资,然后再考虑利用留存收益筹资。()
最新回复
(
0
)