首页
登录
职称英语
Mudslide and PreventionVocabulary and Expressionsdebris flow topography
Mudslide and PreventionVocabulary and Expressionsdebris flow topography
游客
2025-01-26
8
管理
问题
Mudslide and Prevention
Vocabulary and Expressions
debris flow topography armor scallop
landslide disturbance roadcut terrain
saturate drain ... Off [br] O’Connor mentioned five strategies to decrease the risk of mudslides.
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
根据原文,应该是提到了三种方法,分别是“draining water off hillsides”,“armoring the bases of hills”以及“loading the toe”,故本题表述错误。
转载请注明原文地址:https://tihaiku.com/zcyy/3929729.html
相关试题推荐
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
MudslideandPreventionVocabularyandExpressionsdebrisflowtopography
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[br][originalt
Whatcausedthemudslideaccordingtotheresearchhydrologist?[originaltext]Ji
随机试题
Sincetheshipmentconsistsofseasonablegoods,itisimportantthatitis_____
WhenwerethechemicalsfirstusedinAmerica?A、BeforetheAmericanRevolution.
GeorgeHerbertMeadsaidthathumansaretalkedintohumanity.Hemeantthat
[audioFiles]audio_eufm_j95_001(20082)[/audioFiles]A、Heenjoyshislifeverymuc
Forthispart,youareallowed30minutestowriteALettertotheMayoraboutt
TheInternetaffordsanonymitytoitsus
涡流检测属于无损探伤,其主要特点有()。A:适用于任何材料检测 B:无须耦合
下列各项中,不符合借贷记账法记账规则的是()。 A.资产数额的增加记在借方
下列学习中属于符号学习的有()。 A.汉字学习B.英语单词学习 C.图像
甲施工企业与乙钢材生产企业签订一份600万元的钢材购销合同,合同约定甲施工企
最新回复
(
0
)