ABSTRACT
The need for water resource management in a changing world is illustrated through a number of themes and case studies in this chapter. Equally there are different management structures and principles that can be used to manage the change. In order to understand and make predictions concerning change it is essential to understand the fundamentals of hydrology: how processes operate in time and space; how to measure and estimate the rates of flux for those processes; and how to analyse the resultant data. The fundamental processes do not change; it is their rates of flux in different locations that alter. It is fundamentally important that hydrology as a science is investigating these rates of change, and finding new ways of looking at the scales of change in the next 100 years.
