Spatial and temporal variability of UK river flow regimes

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Spatial and temporal variability of UK river flow regimes. / Bower, Donna; Hannah, David M.

In: IAHS-AISH Publication, No. 274, 01.01.2002, p. 457-466.

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@article{019374e057d04fbfa51937b4ee295741,
title = "Spatial and temporal variability of UK river flow regimes",
abstract = "This paper investigates the spatial distribution and temporal stability of annual flow regimes within the UK, using 25-year records for 35 gauging stations. A multivariate, statistical classification of regime {"}shape{"} and {"}magnitude{"} is used: (a) to regionalize long-term average regimes and (b) to establish inter-annual variability (stability) in regimes at stations and within {"}regions{"}. Regionalization yields four {"}shape{"} classes with different timing of major flow peaks and three {"}magnitude{"} classes. Stability analysis identifies six {"}shape{"} and four {"}magnitude{"} classes. These results suggest regime {"}shape{"} is controlled by the seasonal distribution and nature of hydroclimatic inputs. Although regime {"}magnitude{"} decreases along a west-east precipitation gradient at the UK scale, inter-annual variations in {"}magnitude{"} at a station may be linked to large-scale atmospheric circulation patterns, particularly during the autumn recharge season. Both regime {"}Shape{"} and {"}magnitude{"} are influenced by geology; basins associated with major aquifers exhibit greater stability in regime {"}shape{"}. However, strong synoptic climatological forcing may cause a single regime type to dominate across the UK.",
keywords = "Classification, Hydroclimatology, Regimes, Regionalization, River flow, UK",
author = "Donna Bower and Hannah, {David M.}",
year = "2002",
month = jan,
day = "1",
language = "English",
pages = "457--466",
journal = "IAHS Proceedings and Reports",
issn = "0144-7815",
number = "274",

}

RIS

TY - JOUR

T1 - Spatial and temporal variability of UK river flow regimes

AU - Bower, Donna

AU - Hannah, David M.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - This paper investigates the spatial distribution and temporal stability of annual flow regimes within the UK, using 25-year records for 35 gauging stations. A multivariate, statistical classification of regime "shape" and "magnitude" is used: (a) to regionalize long-term average regimes and (b) to establish inter-annual variability (stability) in regimes at stations and within "regions". Regionalization yields four "shape" classes with different timing of major flow peaks and three "magnitude" classes. Stability analysis identifies six "shape" and four "magnitude" classes. These results suggest regime "shape" is controlled by the seasonal distribution and nature of hydroclimatic inputs. Although regime "magnitude" decreases along a west-east precipitation gradient at the UK scale, inter-annual variations in "magnitude" at a station may be linked to large-scale atmospheric circulation patterns, particularly during the autumn recharge season. Both regime "Shape" and "magnitude" are influenced by geology; basins associated with major aquifers exhibit greater stability in regime "shape". However, strong synoptic climatological forcing may cause a single regime type to dominate across the UK.

AB - This paper investigates the spatial distribution and temporal stability of annual flow regimes within the UK, using 25-year records for 35 gauging stations. A multivariate, statistical classification of regime "shape" and "magnitude" is used: (a) to regionalize long-term average regimes and (b) to establish inter-annual variability (stability) in regimes at stations and within "regions". Regionalization yields four "shape" classes with different timing of major flow peaks and three "magnitude" classes. Stability analysis identifies six "shape" and four "magnitude" classes. These results suggest regime "shape" is controlled by the seasonal distribution and nature of hydroclimatic inputs. Although regime "magnitude" decreases along a west-east precipitation gradient at the UK scale, inter-annual variations in "magnitude" at a station may be linked to large-scale atmospheric circulation patterns, particularly during the autumn recharge season. Both regime "Shape" and "magnitude" are influenced by geology; basins associated with major aquifers exhibit greater stability in regime "shape". However, strong synoptic climatological forcing may cause a single regime type to dominate across the UK.

KW - Classification

KW - Hydroclimatology

KW - Regimes

KW - Regionalization

KW - River flow

KW - UK

UR - http://www.scopus.com/inward/record.url?scp=0036096691&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0036096691

SP - 457

EP - 466

JO - IAHS Proceedings and Reports

JF - IAHS Proceedings and Reports

SN - 0144-7815

IS - 274

ER -