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Groundwater resource accounting : critical for effective management in a 'changing world' (Inglês)

Groundwater resource accounting provides the essential technical foundation for making sound management decisions. While normally expressed in terms of the 'groundwater balance' of a specified 'groundwater body' between recharge (replenishment) and discharge (including use) it is most important to realize that it is the detailed understanding and breakdown of the components of this balance which provide vital information for management. It is precisely because this breakdown is often insufficient or incorrect that groundwater balances are frequently found inadequate for resource management purposes and this is commonly associated with the following considerations: 1) on the 'recharge side' of the equation failure to recognizes the level of dependence upon land use practices or upon streambed infiltration in a river system, both of which may be subject to temporal change; 2) on the 'discharge side' of the equation failure to recognize the level of non-consumptive use and 'return flow' implicit in a given type of major groundwater abstraction or the level of dependence of a given aquatic or terrestrial ecosystem on direct transpiration from the groundwater body.

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