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. 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. Bear and others published seawater intrusion in coastal aquifers find, read and cite all the research you need on. The major coastal aquifer systems are shown in figure 1 and are set out in table 1. Concepts, methods and practices theory and applications of transport in porous media jacob bear, a. Pdf seawater intrusion in coastal aquifers researchgate. Aug 04, 2014 in the central coast has caused groundwater levels to decline, allowing seawater to move into the coastal aquifers. Seawater intrusion has become a global issue and related studies can be found from coastal aquifers around the world, including israel sivan. 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.
In coastal regions, the groundwater as a primary or sole source of fresh water is. Essaouira, morocco, april 2325, 2001 seawater intrusion in coastal aquifers. 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. Tipping points for seawater intrusion in coastal aquifers. Sea intrusion, exacerbated by intensive exploitation, threatens coastal aquifers with largescale and slowtoreverse contamination. Though saltwater intrusion is a naturally occurring process, it can also be influenced by human activity. As sea water intrusion progresses, existing pumping wells, especially those close to the coast, become saline and have to be abandoned. Mar 20, 2014 seawater intrusion has been an important topic in hydrogeology in china in recent decades. Saltwater can contaminate freshwater aquifers when one or more of the following mechanisms occur.
A recent study has shown that the effect of aquifer slope can not be neglected when assessing slrswi in unconfined coastal aquifers. Assessing impacts of sea level rise on seawater intrusion in coastal aquifers. The second international conference on saltwater intrusion. Click download or read online button to get saltwater intrusion in coastal aquifers book now. First international conference on saltwater intrusion and coastal aquifers monitoring, modeling, and management. 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. Monitoring of seawater intrusion in coastal aquifers. 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. The spatial discrepancy of water resource distribution has caused the studies of seawater intrusion into china to.
Most attention is concentrated on the marine water intrusion into 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. Pdf hydrogeochemical processes and influence of seawater. Saltwater intrusion has occurred to some degree in many of the coastal aquifers of the united states. Simulation of seawater intrusion in coastal confined aquifer. 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. Tidal influence on seawater intrusion in unconfined coastal. Seawater intrusion into coastal aquifers springerlink. Seawater intrusion in coastal aquifers download ebook pdf. In many coastal aquifers, intrusion of seawater has become one of the major constraints imposed on groundwater utilization. This paper describes a 3d seawater intrusion modeling process for a specified study area in eastern coast aquifer, in ne tunisia.
Numerical modelling, seawater intrusion, optimal management, abstraction, recharge 1. 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. Pattern diagrams, which constitute the outcome of several hydrogeochemical processes, have traditionally been used to characterize vulnerability to seawater intrusion. Seawater intrusion and coastal aquifer management in china. Saltwater intrusion occurs naturally to some degree in most coastal aquifers, owing to the hydraulic connection between groundwater and seawater. Introduction over 70% of the worlds populations live in coastal areas. Experimental investigation of the effects of revetments on. The management of coastal aquifers involves the identification of an acceptable ultimate landward extent of the saline water body and the. Assessment of the impact of sealevel rise on seawater. Management of seawater intrusion in coastal aquifers.
Bear and others published seawater intrusion in coastal aquifers find, read and cite all the research you need on researchgate. Pdf saltwater intrusion in coastal aquifers researchgate. The present study was carried out to determine the hydrogeochemical processes and influence of seawater intrusion in the coastal. Abstraction, desalination and recharge method to control. Seawater intrusion is the first cause of contamination of coastal aquifers date. Seawater intrusion promotes the salinity of groundwater, and it poses a great environmental impact on a global scale. Saltwater intrusion is the induced flow of seawater into freshwater aquifers primarily caused by groundwater development near the coast. 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. Greatly affected by the characteristics of the aquifer. Three dimensional simulation of seawater intrusion in a. Recent achievements in the field of modeling seawater intrusion into coastal. Process where seawater infiltrates a coastal aquifer impacting the groundwater. Replenishing an unconfined coastal aquifer to control. 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.
When the extracted volumes are greater than the recharge, even on a local basis, a salinisation process begins in the aquifer as the. Jul 31, 2007 about 60 percent of coastal aquifers are contaminated by seawater intrusion, a generalised phenomenon in 20 percent of cases. The withdrawal of groundwater by public supply wells and numerous irrigation wells has resulted in the increased intrusion encroachment of seawater inland. Coastal aquifers serve as major sources for freshwater supply in many. Seawater intrusion processes, investigation and management. Saltwater intrusion can become a problem when saltwater moves far enough inland that it intrudes into fresh groundwater sources such as wells. Special issue 85 proceedings of the 15th international coastal symposium.
In many coastal aquifers, intrusion of seawater has become one of the major. Download saltwater intrusion in coastal aquifers or read online books in pdf, epub, tuebl, and mobi format. Delineating multiple salinization processes in a coastal plain aquifer. To protect the freshwater within coastal aquifers from being contaminated by salt water, various strategies. Intrusion of seawater into coastal aquifers poses a serious challenge in the utilization of groundwater 1. Optimal control of seawater intrusion in coastal aquifers. Therefore, appropriate management strategies should be. Seawater intrusion results in the contamination of coastal aquifers and, therefore a reduction in the available water for human consumption and agriculture. Seawater intrusion in coastal aquifers concepts, methods and. 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. Effects of seasonal variations in extraction and recharge rates c. Seawater intrusion in coastal aquifers concepts, methods. Seawater intrusion and groundwater resources management in.
Pdf management of aquifer recharge in lebanon by removing. Management of aquifer recharge in lebanon by removing seawater intrusion from coastal aquifers. Click download or read online button to get seawater intrusion in coastal aquifers book now. Pdf management of seawater intrusion in coastal aquifers. Results show that development of exploitation is not possible for section a, b and o among total sections of mazandaran coastal aquifers. Coastal aquifers are increasingly threatened by seawater intrusion due to increased urbanization, groundwater exploitation, and global sealevel rise. This proposed strategy can be considered as a powerful tool for costeffective management of seawater intrusion in coastal aquifers. Salt water intrusion of coastal aquifers in the united states pdf.
Assessing impacts of sea level rise on seawater intrusion in coastal. Experts have found viable solutions implying not so much investment. 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. Seawater intrusion is the first cause of contamination of. This results in the encroachment of seawater into the fresh water aquifer 2. Study along the adriatic coast investigated within. Pdf variations in groundwater density, resulting from variations in salinity, can have an important effect on groundwater flow. Development of a groundwater quality index for seawater. Simulation of seawater intrusion in coastal aquifers. 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. These aquifers are interbedded with lower permeability layers of silt and clay aquitards that pass water more slowly. Seawater intrusion associated with lowering of groundwater levels is an important issue in many of californias coastal groundwater basins. Extent of saltwater intrusion sand islands because so little use is made of groundwater from the sand.
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