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
2023-08-04
65
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/2896656.html
相关试题推荐
A、Theyuseamusinglanguage.B、Theycoverinternationalnews.C、Theyexpresspub
A、seldomprovidesinternationalversionsB、seldomprovidesguaranteefortheboo
[originaltext]Thestudyon400children.inthejournalScience,initially
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
AccordingtoascientificstudypublishedinApril,2015,birdshaveshownt
A)Oneofthelittleritualsallinternationaltravelersgothroughiscusto
A)Oneofthelittleritualsallinternationaltravelersgothroughiscusto
A)Oneofthelittleritualsallinternationaltravelersgothroughiscusto
随机试题
[originaltext]IsthisyourfirsttimetocometoBeijing?[/originaltext][origi
Whatdoesthispassagemainlydescribe?Howto______.[br]Howmuchdifferenc
用户界面设计的原则不包括()。A.将用户界面置于用户控制之下 B.减少用户的
网络服务提供者的下列行为可以免责的是()。A.为侵权作品提供存储空间 B
酒的能量来源有( )。A.甲醇 B.乙醇 C.有机酸 D.矿物质
金银花中的抗菌有效成分是A.胆酸 B.别胆酸 C.牛磺酸 D.粪甾烷酸
某甲因为打架被判处拘役,对受害人给付赔偿费,同时被所在单位开除公职。他所受的法律
教育法律关系是指()。A.教育法律规范在调整人们的教育行为过程中形成的教
2007-54.眩晕而见头重如蒙,胸闷恶心,食少多寐,舌苔白腻,脉濡滑。其治法是
安装公司承接某商务楼的机电安装工程,工程主要内容是通风与空调,建筑给排水、建筑电
最新回复
(
0
)