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
76
管理
问题
Mudslide and Prevention
Vocabulary and Expressions
debris flow topography armor scallop
landslide disturbance roadcut terrain
saturate drain ... Off [br] The piles of rock that are often seen at the base of roadcuts are the most visible example of "loading the toe".
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
A
解析
根据上下文,原文“…piles of rock…example of that strategy”中的“that strategy”即“loading the toe”,故本题表述正确。
转载请注明原文地址:http://tihaiku.com/zcyy/3315170.html
相关试题推荐
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[originaltext]Ji
随机试题
Itisamatterofcommonobservationthatalthoughincomeskeepgoingupove
ANiceCupofTeaTheLegendaryOriginsofTeaA)Thestoryofteabegan
下列关于小脑功能的描述,正确的是()A.前庭小脑主要调节肌紧张 B.脊髓小
下列事项中应当制发通知的有()。A.某大学向某市旅游局联系有关学生毕业实习的事
光纤传输测试指标中,回波损耗是指()。A.信号反射引起的衰减 B.传输距离
A.募穴 B.络穴 C.下合穴 D.俞穴 E.原穴中府、巨阙、期门、膻中
Thechangeinthatvillagewasmiraculou
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
结束了“禅让制”的是( )A.尧 B.舜 C.禹 D.启
患者女,42岁。劳累时心悸、气短2年,腹胀、尿少3天。心电图示心房颤动,心室率1
最新回复
(
0
)