Global groundwater wells at risk of running dry

doi:10.1126/science.abc2755

GSTDTAP > 气候变化

DOI	10.1126/science.abc2755
	Global groundwater wells at risk of running dry
	Scott Jasechko; Debra Perrone
	2021-04-23
发表期刊	Science
出版年	2021
英文摘要	Groundwater provides nearly half of the water used for agricultural irrigation and most of the drinking water for billions of people. It is essential, then, for this resource to remain secure. Jasechko and Perrone examined data from approximately 39 million wells in 40 countries worldwide to investigate their vulnerability to declining water levels (see the Perspective by Famiglietti and Ferguson). The authors found that construction of deeper wells is not occurring in some areas that are experiencing groundwater decline, a disconnect that poses risks for people who rely on well water. Science , this issue p. [418][1]; see also p. [344][2] Groundwater wells supply water to billions of people, but they can run dry when water tables decline. Here, we analyzed construction records for ~39 million globally distributed wells. We show that 6 to 20% of wells are no more than 5 meters deeper than the water table, implying that millions of wells are at risk of running dry if groundwater levels decline by only a few meters. Further, newer wells are not being constructed deeper than older wells in some of the places experiencing significant groundwater level declines, suggesting that newer wells are at least as likely to run dry as older wells if groundwater levels continue to decline. Poor water quality in deep aquifers and the high costs of well construction limit the effectiveness of tapping deep groundwater to stave off the loss of access to water as wells run dry. [1]: /lookup/doi/10.1126/science.abc2755 [2]: /lookup/doi/10.1126/science.abh2867
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/324085
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Scott Jasechko,Debra Perrone. Global groundwater wells at risk of running dry[J]. Science,2021.
APA	Scott Jasechko,&Debra Perrone.(2021).Global groundwater wells at risk of running dry.Science.
MLA	Scott Jasechko,et al."Global groundwater wells at risk of running dry".Science (2021).