High Use Stream Management Areas Overlay

A number of streams in Auckland are under pressure from demands to take water, or use water for a number of purposes. The high use of these streams creates conflicts between the amount of water being abstracted, the amount of water needed to be left in the stream for other uses, such as assimilating the adverse effects of discharges, and the amount of water required to maintain ecological values and base flows. Management of high-use streams can be particularly difficult during during summer months when stream flows are generally at their lowest.奥克兰境内的多条溪流正面临取水需求及多用途用水带来的资源压力。高强度取用这些溪流的水资源，引发了三类用水需求间的冲突：一是实际取用水量，二是为满足水体自净等其他用途需留存于溪流的水量（如消解排放物的负面影响），三是维持溪流生态价值与基流（base flow）所需的水量。在夏季月份，溪流流量普遍处于全年最低水平，此时对这类高强度用水溪流的管理难度尤显突出。