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
8
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:https://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
胎儿大脑发育的关键时期是A.出生后6个月 B.妊娠最后6个月 C.出生后8个
手指头感染已形成脓肿时,治疗原则为:A.冷敷 B.热敷 C.切开引流 D.
下列各项中,属于创新活动的有( )。A.应用研究 B.产品创新 C.工艺创
28岁,G2P0,孕31周,从28周开始反复阴道流血,共4次,出血量少于月经量,
读右图。 获得此云图所用的地理信息技术是()查看材料A.GIS B.
请回答血海、足三里的定位、归经及操作。(10分)
共用题干 HealthInsurance(保险)MostAmericans
在期权存续期内,红利支付导致标的资产价格下降,但对看涨期权的价值没有影响。(
A.禁止用试验性药 B.选用对胎儿危害较小的药物 C.用药必须有明确的指征和
采用定额单价法编制施工图预算的基本步骤有:①套用定额单价,计算人、料、机费用;②
最新回复
(
0
)