Resilience Glossary: U – Z

Term

Definition

Source

Uncertainty

A general concept that reflects our lack of sureness about someone or something, ranging from just short of complete sureness to an almost complete lack of conviction about an outcome.

FLOODsite

Uncertainty analysis

Uncertainty analysis is the process of assessing the extent of uncertainty in model results or predictions, in order to communicate their fitness as a basis for decision-making.

FLOODsite

University centre of excellence (BRE)

The BRE University Centres of Excellence currently support 110 PhD students, 39 full-time equivalent staff and 25 research associates, all carrying out cutting-edge research to improve our understanding of the built environment and how users interact with it

BRE

Urbanisation

A transition in population demographics from rural areas to urban areas.

Centre for Resilience

Validation

This is the process of comparing model output with observations of the ’real world’.

FLOODsite

Variability

The change over time of the value or state of some parameter or system or element, where this change may be systemic, cyclical or exhibit no apparent pattern.

FLOODsite

Variable

A quantity, which can be measured, predicted or forecast which is relevant to describing the state of the flooding system e.g. water level, discharge, velocity, wave height, distance, or time. A prediction or forecast of a variable will often rely on a simulation model, which incorporates a set of parameters.

FLOODsite

Voluntariness

The degree to which an individual understands and knowingly accepts the risk to, which they are exposed in return for experiencing a perceived benefit. For an individual may preferentially choose to live in the flood plain to experience its beauty and tranquillity.

FLOODsite

Vulnerability

Characteristic of a system that describes its potential to be harmed. This can be considered as a combination of susceptibility and value.

FLOODsite

Water Butts

Storage of rain water for outside use.

FMMEP

Water Management

Water management refers to various activities, which aims for an optimal use and distribution of surface and subsurface water, the rationing of drinking water abstraction and distribution and an effective wastewater treatment. Besides the study, planning, monitoring, and application of quantitative and qualitative control and development techniques for long-term and multiple use of the diverse forms of water resources, also the flood protection counts to the tasks of water management.

FMMEP

Waterproofing

Sealing of walls and ceiling to avoid water penetration into the structure.

FMMEP

Watershed

See catchment area

UFM

Weep hole

Small holes around the base of cavity walls, this allows any moisture that has entered the cavity wall to escape, as well as allowing ventilation to enter the cavity in order to prevent mould.

Centre for Resilience

Weir

A weir is a small overflow-type dam commonly used to raise the level of a small river or stream.

FMMEP

Wet proofing

The water is allowed to enter the building but the building fabric and the contents are “waterproofed” by application of flood resistant materials. (Era Net Crue)

SMARTeST

Zoning plans

These are plans of restricted areas within the municipality.

FMMEP

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