Glossary & Keywords

Keywords (in the context of this approach):

  • ATREPO: Attenuation Research Network
  • Flooding: Fluvial inundation of natural storage floodplains
  • Exceedance: Stage levels above those on which communities have come to rely
  • Attenuation: By communal FRM rather than private resilience
  • Wellbeing:  Enhanced when not under threat
  • 2D modeling: Relatively objective/generic rather than subjective predictive tool
  • Multiple Benefit: in this context, the addition of hydraulic benefit to those of biodiversity and pollution
  • Riparian: Along watercourses.  Law relating to both water quality and quantity
  • Sustainable: in respect of climate-change for communities at risk
  • Biomass: Energy from agriculture
  • Communication: so that upstream landowners/managers understand the benefits and consequencies of their actions
  • Transparent: broad straightforward well communicated approach
  •  Local: non central
  • 3m pollution strips; agricultural buffer strips such as Glastir
  • biodiversity; good for all populations
  • wellbeing; good for human population
  • WFD: Water Framework Directive: in this context, WFD quality driving quantity control




1D One dimensional
2D Two dimensional
Argae Welsh language earthen embankment or levee
ascii American Standard Code for Information Interchange
Biomass Sustainable energy-product of land-use
Breaklines GIS vector lines linking groups of GIS points often in relation to natural terrain features
Broad-hedge-weir A wide (3m – 5m ) robust hedge which is porous but which holds floodwater back and creates a shallow weir
Buffer An area surrounding a terrain feature described spatially, in this study, by points
CAP Common Agricultural Policy
CFD Computational Fluid Dynamics
CFD-mesh A set of CFD elements (often triangular or rectangular) describing a surface spatially
CPU Central Processing Unit
Cross-compliance Agricultural requirements relating to payments under CAP
CRUEA ClimateResearchUnitEast AngliaUniversity
cumecs Cubic metres per second
Discretization The process of segmenting a model
Distributed Applying to a model discretized into elements
DTM or DEM or Bed Digital Terrain or Elevaton Model; a digital representation of the Earth’s surface excluding features such as trees, buildings, etc
DWPA Diffuse Water Pollution from Agriculture
Exceedance Flow in excess of capacity
FEH Flood Estimation Handbook (and software)
FF Flood Frequency
Foreign-water Water draining to a zone from without
FRM Flood Risk Management
GIS Graphical Information System
Glastir A whole farm sustainable land management scheme available to farmers and land managers acrossWales.
Globalmapper Low cost proprietary GIS software developed and distributed by Global Mapper Software LLC,Colorado,80138,USA
GPU Graphics Processing Unit
Ground-truthing Calibration of remotely sensed data by land survey
GUI Graphical User Interface
Hard/soft assets FRM structures; embankments are ‘hard’; hedges are ‘soft’
Hecras HydraulicEngineeringCentreRiverAnalysis System
Himan Project terminology for high Manning’s n terrain
HN Hydrodynamic numerical
IDB Internal Drainage Boards administering the Land Drainage Act, 1930
IGES Institute of Geography and Earth Science,AberystwythUniversity
IPCC Intergovernmental Panel on Climate Change
ISIS Proprietary UK River Modelling software by Halcrow Group Ltd
Land-use Specific to hydraulic characteristics
Lateral structures Features which cross the floodplain
LBPG Project terminology for Longitudinal Bankside Porous Levee with Gaps (to control connection between main channel and its floodplain)
LBPL Project terminology for Longitudinal Bankside Porous Levee
LDA Land Drainage Act, 1930
Lidar Light Detection and Ranging
LLFA Local Lead Flood Authority as described by the Flood and Water Bill 2010
Loman Project terminology for low Manning’s n terrain
Manning’s n Coefficient describing hydraulic roughness. An increase in n value causes a decrease in the velocity of water flowing across a surface
NFF National Flood Forum
Overbank Discharge which exceeds the capacity of the conveyance (river) channel
PC Personal Computer
PIDB Powysland Internal Drainage Board
Piedmont The transition zone between plains and low relief hills
Point-cloud  A set of vertices in a three-dimensional coordinate system
Productive Generating benefit, speed of analysis or speed of communication
Rating curve Stage — discharge relationship (curve) eg at a gauge station or model boundary
Resilience Indicative of vulnerabilty to flood loss
RP Return Period in years of a flood event indicating its risk
SD European Union Soil Framework Directive 2006
stage Water surface elevation
Stakeholder An interested party
Steady-state Non-varying parameter (eg hydraulic flow)
Streaming Data output in real-time
SUDS Sustainable Drainage System
Terrain Bare-earth ground surface including embankments but generally devoid of soft and built features
TIN Triangular Irregular Network
Transient Time-varying parameter (eg transient, unsteady, hydraulic flow)
TUFLOW Proprietary river modelling software
UK-ABI United Kingdom- Association of British Insurers
UK-Defra United Kingdom- Department of the Environment, Food and Rural Affairs
UK-EA United Kingdom- Environment Agency (UK-EA-FRM is flood risk management)
UK-GOV United Kingdom- Central Government
UK-SEPA United Kingdom- Scottish Environmental Protection Agency
UK-SGOV United Kingdom- Scottish Government
UK-WAG United Kingdom- Welsh Area Government
Weir equation Stage — discharge relationship (equation) eg at a gauge station or model boundary
WFD Water Framework Directive, 2000, adopted intoUKlaw 2003
WRA Water Resources Act, 1991

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