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
18
管理
问题
Mudslide and Prevention
Vocabulary and Expressions
debris flow topography armor scallop
landslide disturbance roadcut terrain
saturate drain ... Off [br] A heavy rainfall saturates the ground on a slope, which may cause a mudslide.
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
该表述是对原文“Mudslides occur after water…heavy rainfall”的合理推断,故本题表述正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3315165.html
相关试题推荐
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
随机试题
Whatisthesourceofthisextremeself-confidencefoundinalmostalloptim
[originaltext]MarcoPolowas17yearsoldwhenhesetoutonthemostfamou
围护结构热桥部位的内表面温度不应低于:()A.室内设计温度 B.室内空气最
半夏泻心汤适用于()A.脾胃虚弱,寒热错杂。症见脘腹痞胀,恶食懒倦,大
创业板市场的功能包括( )。 ①承担风险资本的退出窗口作用 ②优化资源配置
海金沙药材的药用部位是A:花粉B:孢子C:种子D:果实E:花粉加工品
共用题干 LessIsMoreItsoundsallwrong一dr
在正常情况下,盐酸肾上腺素注射剂的外观性状是A:橙黄色的油状液体 B:无色澄明
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
常见的教案有()、()和综合式三种。
最新回复
(
0
)