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Contains terms and definitions used in the reference book, the project and the structure of the Ontology.

Browse the glossary using this index

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Major drainage system

The above ground drainage systems. These would include watercourses and rivers which form the principal drainage pathways for catchments and the overland flow paths on river flood plains and the urban environment. These are broadly classified into two types: within channel flows or overland flow paths.


A measures or an activity, including any process, to avoid, reduce, remedy or compensate for adverse impacts of floods.

Minor drainage system

The underground piped drainage systems which are typically sewers but could also be culverted watercourses or highway drains.


The source of a collection of indicative signs that create an expressive sign in the mind of the beholder. It also may be defined as series of mathematical equations in a computer developed and used with the aim of replicating the behaviour of a system.

Modern science

A particular form of science which was established at a very specific time, namely the Seventh of March, 1277, and in a very specific place, namely the University of Paris, and enunciated by Étienne Tempier. It is based on the premise that in every complex system (or phenomena) the behaviour of the whole can be understood entirely from the properties of its parts.


Procedure of measuring characteristics of a process or a system.


The one that uses the knowledge/understanding of more than one discipline.


One of core elements of holistic planning. It aims at intertwining or combining different functions over limited space (or resources) more effectively. It tends to be used with tangible objects and technology.


One of core elements of holistic planning. It aims at fulfilling several purposes. It tends to be used with material objects and technology. It relates to both tangible and intangible objects and aspects.