Introduction

Question 1

Model Definition

Answer 1

A model is an idealised description of reality or in fact of our perception of reality

Question 2

Model valids for certain bounds of application:

Answer 2

 Certain processes and variables (e.g. floods)

 Certain locations (e.g. climates or catchment conditions)

 Certain space scales (point, catchment)

 Certain time scales (minute, hour, day, years)

Question 3

Why modelling?

Answer 3

 Limitation of hydrological measurement techniques

 Extrapolation in space (ungauged locations) and time (future)

 Forecasting, Decision support, planning, impact analysis, research