As sea water intrusion progresses, existing pumping wells, especially those close to the coast, become saline and have to be abandoned. Management of aquifer recharge in lebanon by removing seawater intrusion from coastal aquifers. The second international conference on saltwater intrusion. Mar 20, 2014 seawater intrusion has been an important topic in hydrogeology in china in recent decades. This proposed strategy can be considered as a powerful tool for costeffective management of seawater intrusion in coastal aquifers. Tidal influence on seawater intrusion in unconfined coastal. This site is like a library, use search box in the widget to get ebook that you want.
The exploitation of coastal aquifers always produces a lowering of the water table levels which are protected by the effects in the coastal strip of the sea level. The present study was carried out to determine the hydrogeochemical processes and influence of seawater intrusion in the coastal. Bear and others published seawater intrusion in coastal aquifers find, read and cite all the research you need on researchgate. Seawater intrusion in coastal aquifers download ebook pdf. Therefore, appropriate management strategies should be. Monitoring of seawater intrusion in coastal aquifers. Saltwater intrusion in coastal aquifers download ebook pdf.
Recent achievements in the field of modeling seawater intrusion into coastal. Download saltwater intrusion in coastal aquifers or read online books in pdf, epub, tuebl, and mobi format. In many coastal aquifers, intrusion of seawater has become one of the major constraints imposed on groundwater utilization. Seawater intrusion into coastal aquifers could cause serious consequences in terms of both environmental and economic impacts, for which effective management strategies are required e. Seawater intrusion sgma usgs ca water science center. Effects of seasonal variations in extraction and recharge rates c. Study along the adriatic coast investigated within. Where groundwater is being pumped from aquifers that are in hydraulic connection with the sea, induced gradients may cause the migration of salt water from the sea toward a well, making the freshwater well unusable. Pdf management of seawater intrusion in coastal aquifers. The rapid growth of the population and economy in the coastal regions has been consuming a tremendous amount of groundwater resources and has increased the extent of seawater intrusion. The simulation results presented in this paper are based on the densitydependent miscible flow and transport modeling approach for simulation of seawater intrusion in coastal aquifers. This paper describes a 3d seawater intrusion modeling process for a specified study area in eastern coast aquifer, in ne tunisia.
May 25, 2008 the hydrological, hydrophysical, and hydrochemical aspects of the interaction between marine waters and groundwater in the adjacent land territory as a manifestation of the general process of interaction between surface and subsurface waters. Pattern diagrams, which constitute the outcome of several hydrogeochemical processes, have traditionally been used to characterize vulnerability to seawater intrusion. Essaouira, morocco, april 2325, 2001 seawater intrusion in coastal aquifers. Greatly affected by the characteristics of the aquifer.
Intrusion of seawater into coastal aquifers poses a serious challenge in the utilization of groundwater 1. Woo dong lee, young jae yoo, yeon myeong jeong, yeong han jeong, and dong soo hur 2018 experimental investigation of the effects of revetments on seawater intrusion in coastal aquifers. It occurs as an outcome of more groundwater being pumped from coastal aquifers in excess of that which can be replenished causing the decline of piezometric head. Seawater intrusion into coastal aquifers springerlink. These aquifers are interbedded with lower permeability layers of silt and clay aquitards that pass water more slowly. Aug 04, 2014 in the central coast has caused groundwater levels to decline, allowing seawater to move into the coastal aquifers.
Seawater intrusion processes, investigation and management. Pdf hydrogeochemical processes and influence of seawater. In coastal regions, the groundwater as a primary or sole source of fresh water is. Seawater intrusion has become a global issue and related studies can be found from coastal aquifers around the world, including israel sivan. Pdf variations in groundwater density, resulting from variations in salinity, can have an important effect on groundwater flow. Saltwater intrusion is the movement of saline water into freshwater aquifers, which can lead to contamination of drinking water sources and other consequences. Coastal aquifers are increasingly threatened by seawater intrusion due to increased urbanization, groundwater exploitation, and global sealevel rise. Though saltwater intrusion is a naturally occurring process, it can also be influenced by human activity. Abstraction, desalination and recharge method to control. The excessive pumping of groundwater, associated with the lack of natural recharge, has exacerbated the swi problem in arid and semiarid regions. Seawater intrusion in coastal aquifers concepts, methods and. Seawater intrusion is the first cause of contamination of coastal aquifers date. Simulation of seawater intrusion in coastal aquifers.
Click download or read online button to get seawater intrusion in coastal aquifers book now. Bear and others published seawater intrusion in coastal aquifers find, read and cite all the research you need on. Assessing impacts of sea level rise on seawater intrusion in coastal aquifers. The management of coastal aquifers involves the identification of an acceptable ultimate landward extent of the saline water body and the.
Delineating multiple salinization processes in a coastal plain aquifer. Seawater intrusion swi is one of the most challenging and widespread environmental problems that threaten the quality and sustainability of fresh groundwater resources in coastal aquifers. Lateral or horizontal intrusion occurs when excessive water withdrawals from an aquifer cause saline water from the coast to move inland vertical movement or upconing of saltwater can occur near a discharge. The rising demand of water supply due to world population growth and the increase of life standard has led to overabstraction of natural fresh groundwater that followed by further encroachment of saline water into coastal aquifers. Special issue 85 proceedings of the 15th international coastal symposium. Results show that development of exploitation is not possible for section a, b and o among total sections of mazandaran coastal aquifers. Optimal control of seawater intrusion in coastal aquifers. Pdf seawater intrusion in coastal aquifers researchgate. Click download or read online button to get saltwater intrusion in coastal aquifers book now. Seawater intrusion is the first cause of contamination of.
Saltwater intrusion occurs naturally to some degree in most coastal aquifers, owing to the hydraulic connection between groundwater and seawater. Previous studies of the impact of sealevel rise on seawater intrusion slrswi are mostly based on horizontal coastal aquifers, despite that most coastal aquifers are sloping. Management of seawater intrusion in coastal aquifers. Seawater intrusion results in the contamination of coastal aquifers and, therefore a reduction in the available water for human consumption and agriculture. Replenishing an unconfined coastal aquifer to control. Management of saltwater intrusion in coastal aquifers in.
Simulation of seawater intrusion in coastal confined aquifer. Geological survey usgs uses data collection, modeling tools, and scientific analysis to help water managers plan for, and assess, hydrologic issues that can cause undesirable results associated with groundwater use. Jul 31, 2007 about 60 percent of coastal aquifers are contaminated by seawater intrusion, a generalised phenomenon in 20 percent of cases. The spatial discrepancy of water resource distribution has caused the studies of seawater intrusion into china to. Finally, some countermeasures to control salt water intrusion are discussed and a system to monitor salt water intrusion is specified. Experimental investigation of the effects of revetments on. Saltwater intrusion can become a problem when saltwater moves far enough inland that it intrudes into fresh groundwater sources such as wells. Assessment of the impact of sealevel rise on seawater. Tipping points for seawater intrusion in coastal aquifers. Coastal aquifers serve as major sources for freshwater supply in many. Saltwater can contaminate freshwater aquifers when one or more of the following mechanisms occur. First international conference on saltwater intrusion and coastal aquifers monitoring, modeling, and management.
The withdrawal of groundwater by public supply wells and numerous irrigation wells has resulted in the increased intrusion encroachment of seawater inland. Numerical modelling, seawater intrusion, optimal management, abstraction, recharge 1. In many coastal aquifers, intrusion of seawater has become one of the major. I ncluded in this table are details of the coastal sand dune deposits, although the large resources of groundwater in these are mostly underdevel oped. Saltwater intrusion is the induced flow of seawater into freshwater aquifers primarily caused by groundwater development near the coast. Experts have found viable solutions implying not so much investment. Development of a groundwater quality index for seawater. Tidal influence on seawater intrusion in unconfined coastal aquifers woei keong kuan,1,2 guangqiu jin,3 pei xin,1 clare robinson,4 badin gibbes,5 and ling li1,3 received 16 march 2011. The major coastal aquifer systems are shown in figure 1 and are set out in table 1. Island county water resource management plan seawater. Salt water intrusion of coastal aquifers in the united states pdf.
Concepts, methods and practices theory and applications of transport in porous media jacob bear, a. Pdf saltwater intrusion in coastal aquifers researchgate. As seawater moves into an aquifer it causes severe water quality impacts, which can result in saline groundwater that is unsuitable for irrigation or domestic use. Seawater intrusion in coastal aquifers concepts, methods. This results in the encroachment of seawater into the fresh water aquifer 2. Three dimensional simulation of seawater intrusion in a. Seawater intrusion promotes the salinity of groundwater, and it poses a great environmental impact on a global scale. Seawater intrusion associated with lowering of groundwater levels is an important issue in many of californias coastal groundwater basins. Saltwater intrusion has occurred to some degree in many of the coastal aquifers of the united states. Seawater intrusion and coastal aquifer management in china. Process where seawater infiltrates a coastal aquifer impacting the groundwater. A recent study has shown that the effect of aquifer slope can not be neglected when assessing slrswi in unconfined coastal aquifers. Seawater intrusion and groundwater resources management in. Since saltwater cannot be used to irrigate crops or be consumed by people, saltwater intrusion can be very problematic to coastal communities that rely on fresh groundwater supplies for the livelihood.
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