1. The Water System

The hydrological system

Hydrological cycle outline diagram

Click the link below for more about the hydrological cycle from nature.com.

The hydrological cycle as a system (From Waugh – Geography An Integrated Approach)

The hydrological cycle as a system

The Hydrologic Cycle- Geography About.com

The Water Balance

Shows the relationship between the inputs (precipitation) and outputs (run-off + evapotranspiration + or – any changes in storage. At some times the inputs may be greater than the outputs, and at others the outputs may be greater than the inputs (see below).


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The maximum sustainable yield

This refers to the maximum level of extraction of water that can be maintained indefinitely for a given place or region.

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