Coastal aquifer management: monitoring, modeling, and case by Alexander H.D. Cheng, Driss Ouazar

By Alexander H.D. Cheng, Driss Ouazar

Nearly 70% of the world's inhabitants lives in coastal parts, and the vast majority of those humans depend upon coastal aquifers for freshwater. The fragility of those aquifers and their sensitivity to human task call for educated, powerfuble administration to assure their survival. major wisdom and new applied sciences regarding the topic have gathered within the final twenty years, and a necessity has emerged for a finished reference that gathers and disseminates the most important details to engineering practitioners and policymakers.Coastal Aquifer Management-Monitoring, Modeling, and Case reviews offers the main complicated and up to date equipment and instruments for the research and safeguard of coastal aquifers. This "how-to" quantity provides a global point of view with contributions from a world panel of specialists. They deal with subject matters comparable to geohydrology, optimization, uncertainty research, and GIS as they relate to geographically-specific case reports; wisdom from those examples may be utilized to aquifer concerns in different areas. A significant other CD-ROM supplementations the textual content with courses and snap shots, making this assessment an necessary reference and gear for the research of serious freshwater assets.

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In an effort to halt the intrusion and control the overdraft, groundwater management agencies took three major steps from the mid-1950s to mid-1960s, including 1) construction of freshwater injection wells along the coast to prevent the saltwater intrusion by the Los Angeles County Flood Control District (LACFCD); 2) seeking adjudication of the groundwater basins to limit the amount of groundwater that could be pumped annually; and 3) creation of the Water Replenishment District of Southern California (WRD) to purchase artificial replenishment water to make up the annual and accumulated overdrafts, purchase barrier injection water, and to protect the water quality of the CWCB.

Chapter 23: Hydrogeology of the Atlantic continental margin”, The Geology of North America, Vol. 1–2, The Atlantic Continental Margin: US, The Geological Society of America, 1988. E. , “Systematic Makings of Early Stage Hydrogeologic Conceptual Models”, Ground Water, 38(6), 887– 893, 2000. J. , “Salt-Water Encroachment in Southern Nassau and Southwestern Queens Counties, Long Island, New York”, USGS Water Supply Paper 1613-F, 1966. , “Geophysical Surveys for Mapping Boundaries of Fresh Water and Salty Water in Southern Nassau County, Long Island, New York”, 3rd National Outdoor Action Conference Proceedings, NWWA, Orlando, Florida, 1989.

If flow is downward from the wetland into the aquifer, the solute mass flux is calculated as the product of leakage volume and surface-water salinity. The total solute mass flux is summed for the surface-water timesteps and divided by the total leakage volume. This gives an equivalent salinity concentration for the total leakage over the stress period. Whichever direction of the leakage, the computed equivalent salinity is used in SEAWAT as the concentration of the water added or removed from the aquifer as leakage.

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