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
67
管理
问题
Mudslide and Prevention
Vocabulary and Expressions
debris flow topography armor scallop
landslide disturbance roadcut terrain
saturate drain ... Off [br] In the Stillaguamish River area, the scalloped valley is the evidence of many past slides.
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“…the Stillaguamish River area…scalloped with the evidence of …”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/3315171.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
Whatwouldyoudoifyourwalletbecamehardertoopenasyourspendingappr
微分方程(3+2y)xdx+(1+x2)dy=0的通解为:
最常用的血管瘤硬化剂是A.福尔马林 B.碘化油 C.3%鱼肝油酸钠 D.无
盐雾试验结果的判定方法有()。A.超声雾化法 B.评级判定法 C.数据统计法
33岁已婚女性,月经规律,结婚4年,未避孕未曾妊娠,末次月经50天前,阴道少量出
加强指数法的核心思想是将()相结合。A.指数化投资管理与积极型股票投资策略
警衔设()。A.五等十二级 B.五等十三级 C.四等十三级 D.四等十二级
在其他因素不变的条件下,反映运输供给量与运输价格之间关系的曲线是()。A:运价指
删除凭证。账套:001北京正保科技有限公司(一般纳税人企业)会计年度:2012注
根据《水库大坝安全鉴定办法》(水建管[2003]271号),二类坝相应的大坝
最新回复
(
0
)