Wells are the major hydraulic structures for groundwater abstraction from aquifers. They have different geometrical features such as the small or large diameter; full or partial penetration; circular or irregular cross-section, which affect the groundwater movement pattern and hence the amount of ...
The risk this dependence creates is when aquifers are overpumped – also called overdrafted – the groundwater levels are lowered so that no water can be pumped from these wells, leaving families without clean water to drink, cook, or bathe with. Overpumped aquifers can also create higher con...
Sinkholes form when the roof of an underground channel or cavern collapses, creating a large surface crater. Drawing water from caverns and aquifers accelerates the process of collapse. Sinkholes can form suddenly, dropping cars, houses, and trees without warning into a gaping crater hundreds of ...
Groundwater is available in usable quantities only in aquifers. An aquifer is a geological formation which contains water and permits significant amounts of water to move through it under ordinary field conditions. Aquifer can be categorized depending on the hydraulic conductivity as: isotropic vs. ...
wells go dry. On a broader scale, heavy pumping can deplete a whole aquifer. The Ogallala Aquifer, for example, underlies eight states in the arid high plains between Texas and North Dakota. As deep as 400 meters (1,200 feet) in its center, this porous bed of sand, gravel, and ...
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. 展开 DOI: 10.1126/science.abc2755 年份: 2021
CHICAGO, Jan. 26 (Xinhua) -- A study of the University of Illinois (UI) has identified microplastic fibers, along with a variety of medicines and household contaminants, in two aquifer systems in U.S. state of Illinois. The researchers collected 17 groundwater samples from wells and springs...
aquifers’). We find that about one-third of groundwater samples collected from a well that is perforated in a confined aquifer (n = 592) contain more than 5% modern water, highlighting that modern water can enter wells screened in confined aquifers (Supplementary Note7and Supplementary ...
Groundwater recharge and wells : a guide to aquifer storage recovery Understanding the issues that have been encountered at other sites, and the steps that have led to successful resolution of these issues, can provide great help to those considering, planning, or implementing new groundwater recha...
Natural organic matter in sedimentary basins and its relation to arsenic in anoxic ground water: the example of West Bengal and its worldwide implications In order to investigate the mechanism of As release to anoxic ground water in alluvial aquifers, the authors sampled ground waters from 3 ...