Sustainable Management of Groundwater in Mexico Proceedings of a Workshop (2007) / Chapter Skim
Currently Skimming:
A Primer on Groundwater Management
A Primer on Groundwater Management
Pages 26-35
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From page 26... ...
The definition of ground-water sustainability is quite similar to that of safe yield, and just as broad and ambiguous: "the development and use of ground-water resources in a manner that can be maintained for an indefinite time without causing unacceptable environmental, economic or social consequences" (Alley and Leake, 2004)
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From page 27... ...
The top of the saturated zone is the water table. Groundwater is distinguished from other forms of subsurface water by the fact that it occurs under completely saturated conditions (note that there has been a disturbing trend by some in recent years to call all subsurface water "groundwater", which is, strictly speaking, incorrect)
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From page 28... ...
- Q + dV/dt = 0 (2) where: Δ Ro = change in the mean recharge rate; Δ Do = change in the mean discharge rate; Q = pumping rate; and dV/dt = rate of change of groundwater storage in the system.
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From page 29... ...
They felt the need to do this because they noted the prevalent belief among water managers and some hydrologists that the predevelopment water budget – essentially the natural recharge rate – determines the magnitude of ground-water development. This is the so-called "Water-Budget Myth" (hereafter referred to as the WBM)
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From page 30... ...
again dispelled the WBM in a short, lucid paper in which he simulated development in a basin using a numerical ground-water flow model. His model was based on a hypothetical but realistic ground-water basin in the arid Basin and Range Province of the western USA (presumably in Nevada, which has codified the WBM in its water law by restricting a basin's maximum pumping rate to its natural recharge rate)
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From page 31... ...
Effects of Groundwater Overdrafting Wetlands and Riparian/Aquatic Ecosystems Ground-water overdrafting, or withdrawal of groundwater from storage, has recently been recognized as a potential threat to wetlands, riparian areas, and aquatic ecosystems. Surface ecosystems can be dependent upon groundwater; examples include wetlands, often located in ground-water discharge zones and riparian ecosystems, which may depend upon shallow groundwater (Grantham, 1996)
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From page 32... ...
aquifers occurs. Sea-water intrusion can destroy fresh ground-water resources by replacing the pumped fresh water with saline water.
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From page 33... ...
, hazardous waste disposal sites, sewage disposal facilities (e.g., septic tanks) , industrial facilities, and other contaminant sources so that effluent from these sources contaminates neither surface water or groundwater.
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From page 34... ...
Bethesda, MD: American Water Resources Association, Technical Publication Series TPS92-2, pp.
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From page 35... ...
1993. Decreased metal concentrations in ground water caused by controls on phosphate emissions.
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