Britain's Game Fishes by Mark Everard;Paul Knight;

Author:Mark Everard;Paul Knight;
Language: eng
Format: epub
Publisher: Lightning Source Inc. (Tier 2)

12.5 When the well runs dry

The adverse impacts of physical and chemical inputs to watercourses are exacerbated by excessive abstraction of water. As we have seen, we live in a water-stressed world where, even in developed temperate countries, demands upon water resources often outstrip renewable capacity. Throughout the British Isles, but particularly in the more water-scarce south and east of England, there is a great dependence for public water supply upon abstraction of groundwater, which can rob rivers of flows vital for sustaining the needs of their characteristic ecosystems. Elsewhere, except in poorly populated areas on impermeable geologies to the west of the country, abstraction from rivers and other surface waters can be problematic where river flows decline below that necessary to provide migratory triggers, flush sediment from gravels or to support other needs of different stages of game fishes.

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