首页
登录
职称英语
A new study, published in the international scientific journal Nature, revea
A new study, published in the international scientific journal Nature, revea
游客
2024-03-07
35
管理
问题
A new study, published in the international scientific journal Nature, revealed that an estimated half a million cubic kilometers of low-salinity water are buried beneath the seabed on continental shelves around the world.
"The volume of this water resource is a hundred times greater than the amount we’ve extracted from the Earth’s sub-surface in the past century since 1900," says lead author Dr. Vincent Post of the National Centre for Groundwater Research and Training (NCGRT) and the School of the Environment at Flinders University.
Dr. Post said that while scientists knew of freshwater under the seafloor, they thought it only occurred under rare and specific conditions.
These reserves were formed over the past hundreds of thousands of years when on average the sea level was much lower than it is today, and when the coastline was further out, Dr. Post explains.
"So when it rained, the water would infiltrate into the ground and fill up the water table in areas that are nowadays under the sea.
"It happened all around the world, and when the sea level rose when ice caps started melting some 20,000 years ago, these areas were covered by the ocean.
"These aquifers (含水层) protected from seawater by layers of clay and sediment that sit on top of them."
The aquifers are similar to the ones below land, which much of the world relies on for drinking water, and their salinity is low enough for them to be turned into potable water, Dr. Post says.
"There are two ways to access this water—build a platform out at sea and drill into the seabed, or drill from the mainland or islands close to the aquifers.
"Freshwater on our planet is increasingly under stress and strain so the discovery of significant new stores off the coast is very exciting. It means that more options can be considered to help reduce the impact of droughts and continental water shortages."
But while nations may now have new reserves of freshwater offshore, Dr. Post says they will need to take care in how they manage the seabed: "For example, where low-salinity groundwater below the sea is likely to exist, we should take care not to contaminate it.
Dr. Post also warns that these water reserves are non-renewable: "We should u; them carefully—once gone, they won’t be refilled until the sea level drops again." [br] How did these reserves be formed where it is under the sea today?
选项
A、The average sea level dropped and some seawater infiltrated into seabed.
B、Freshwater is heavier than seawater.
C、Sea level increased and covered some areas with underground water.
D、Some underground water infiltrated into aquifers.
答案
C
解析
细节题。根据题干中的these reserves be formed可定位到原文第四段,第四段只提到了大致过程,但第五段提到了雨水补充地下水位,第六段提到海平面上升,覆盖原地下水区域,形成了现在的海底地下淡水,C选项符合,故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3512916.html
相关试题推荐
[originaltext]Thestudyon400children,inthejournalScience,initially
Anewstudy,publishedintheinternationalscientificjournalNature,revea
Anewstudy,publishedintheinternationalscientificjournalNature,revea
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
Bornfromtheaccessibilityofmassairtravel,moderninternationaltourism
随机试题
Writeacompositionofabout150wordsonthefollowingtopic:Someofyourclas
Whatkindofcourseisthemanseeking?[br]【8】[originaltext]Woman:Goodmorni
《盅碗舞》是蒙古族民间舞蹈。()
男性,40岁,体检发现空腹血糖6.4mmol/L关于1997年DNA糖尿病诊断标
A.肝 B.心 C.脾 D.肺 E.肾具有主治节功能的脏是()
A.法律 B.部门规章 C.地方性法规 D.行政法规《处方药与非处方药分类
影响企业产品价格上限的因素是()。A.市场需求 B.市场竞争 C.成本
某混凝土工程按计划12天完成,下图中标出了截止第7天末的实际施工时间,从图中可以
某施工单位编制的某工程网络图,如图2.1所示,网络进度计划原始方案各工作的持续时
阴道自净作用主要得益于( )。A.乳酸杆菌将单糖转化为乳酸,抑制其他病原菌生长
最新回复
(
0
)