Flood Studies Update (FSU) Physical Catchment Descriptors (Gauged) 2025

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Abstract: These statistics have become what are now known as physical catchment descriptors (PCDs). A PCD describes a characteristic of a catchment as a single number. A list of the most commonly used PCDs in the FSU methodologies are summarised as follows; Catchment Area (AREA), Standard Period Average Annual Rainfall (SAAR), Baseflow Index derived from Soils (BFIsoil), Flood Attenuation from Reservoirs and Lakes (FARL), Drain Density (DRAIND), Mainstream Slope (S1085), Arterial Drainage Index (ARTDRAIN2) and Proportion of Urban Landcover Extent (URBEXT).

Lineage: When the FSU Programme was originally launched, 216 flow gauging stations were used. After further detailed analysis of Irish gauging stations in 2025 under the Flood Estimation Methodologies for Ireland (FEMI) research, it was decided to use a smaller dataset of 134 gauging stations that met new suitability criteria. More information can be found on https://www.gov.ie/en/office-of-public-works/collections/flood-studies-update-fsu-programme/

Purpose: The data has been developed to inform the Flood Studies Update (FSU) Programme. The FSU is a programme of research and development, undertaken by the Office of Public Works (OPW), to provide improved methods of extreme rainfall and flood estimation at both gauged and ungauged river locations in the Republic of Ireland.

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Data Dictionary

Column Type Label Description
STN_NU text STN_NU
LOCATION text LOCATION
WATERBODY text WATERBODY
Catchment text Catchment
ORG text ORG
gauge_x__m_ numeric GAUGE_X (m)
gauge_y__m_ numeric GAUGE_Y (m)
poly_area__km_2_ numeric POLY_AREA (km^2)
msl__km_ numeric MSL (km)
netlen__km_ numeric NETLEN (km)
stmfrq__no__ numeric STMFRQ (no.)
draind__km_km_2_ numeric DRAIND (km/km^2)
s1085__m_km_ numeric S1085 (m/km)
artdrain_prop_ numeric ARTDRAIN(prop)
artdrain2__prop_ numeric ARTDRAIN2 (prop)
TAYSLO numeric TAYSLO
RWSEG_CD text RWSEG_CD
farl__index_ numeric FARL (index)
cente__m_ numeric CENTE (m)
centn__m_ numeric CENTN (m)
saar__mm_ numeric SAAR (mm)
urbext____ numeric URBEXT (%)
forest____ numeric FOREST (%)
PEAT numeric PEAT
ALLUV numeric ALLUV
flatwet__index_ numeric FLATWET (index)
saape__mm_ numeric SAAPE (mm)
fai__prop_ numeric FAI (PROP)
bfisoil__index_ numeric BFIsoil (index)
qmedgauged__m_3_s_ numeric Qmedgauged (m^3/s)
QMEDgauged - less urban numeric QMEDgauged - less urban
qmed_rural_femi_from_pcds__m3_s_ numeric QMED rural FEMI from PCDs (m3/s)
adjfac_q__femi_ numeric ADJFAC Q (FEMI)
hgf__m_3_s_ numeric HGF (m^3/s)
hgf_qmed numeric HGF/Qmed
Amax Start numeric Amax Start
Amax end numeric Amax end
Usable Years numeric Usable Years
gap__years_ numeric Gap (years)

Additional Information

Field Value
Data last updated 16 May 2025
Metadata last updated 16 May 2025
Created 16 May 2025
Format CSV
License Creative Commons Attribution 4.0
Access urlhttps://s3.eu-west-1.amazonaws.com/catalogue.floodinfo.opw/hydrology/2025+Flood+Studies+Update+(FSU)+Physical+Catchment+Descriptors+(gauged).csv
Datastore activeTrue
Download urlhttps://s3.eu-west-1.amazonaws.com/catalogue.floodinfo.opw/hydrology/2025+Flood+Studies+Update+(FSU)+Physical+Catchment+Descriptors+(gauged).csv
Has viewsTrue
Hashb60c1629e9bb479fc284a32260a6f03a
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Package id68df07aa-af35-4497-a82e-c7c8d19e2fd4
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Preview rows134
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Total record count134
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