Improved understanding of spatio-temporal controls on regional scale groundwater flooding using hydrograph analysis and impulse response functions

被引:27
作者
Ascott, Matthew J. [1 ]
Marchant, Ben P. [2 ]
Macdonald, David [1 ]
McKenzie, Andrew A. [1 ]
Bloomfield, John Paul [1 ]
机构
[1] British Geol Survey, Maclean Bldg, Crowmarsh Gifford OX10 8BB, Oxon, England
[2] British Geol Survey, Ctr Environm Sci, Nicker Hill, Keyworth NG12 5GG, Notts, England
基金
英国自然环境研究理事会;
关键词
Chalk hydrogeology; groundwater flooding; hydrograph analysis; impulse response functions; standardized precipitation index; STANDARDIZED PRECIPITATION INDEX; SOUTHERN ENGLAND; CHALK CATCHMENT; WINTER FLOODS; THAMES BASIN; WATER-LEVEL; CLIMATE; DROUGHT; RISK; UK;
D O I
10.1002/hyp.11380
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Controls on the spatio-temporal extent of groundwater flooding are poorly understood, despite the long duration of groundwater flood events and distinct social and economic impacts. We developed a novel approach using statistical analysis of groundwater level hydrographs and impulse response functions (IRFs) and applied it to the 2013/2014 Chalk groundwater flooding in the English Lowlands. We proposed a standardized index of groundwater flooding which we calculated for monthly groundwater levels for 26 boreholes in the Chalk. We grouped these standardized series using k-means cluster analysis and cross-correlated the cluster centroids with the Standardized Precipitation Index accumulated over time intervals between 1 and 60months. This analysis reveals 2 spatially coherent groups of standardized hydrographs that responded to precipitation over different timescales. We estimated IRF models of the groundwater level response to effective precipitation for 3 boreholes in each group. The IRF models corroborate the Standardized Precipitation Index analysis showing different response functions between the groups. We applied identical effective precipitation inputs to each of the IRF models and observed differences between the hydrographs from each group. It is suggested this is due to the hydrogeological properties of the Chalk and of overlying relatively low permeability superficial deposits (recent unconsolidated sediments overlying the bedrock, such as clays and tills), which are extensive over 1 of the groups. The overarching controls on groundwater flood response are concluded to be a complex combination of antecedent conditions, rainfall, and catchment hydrogeological properties. These controls should be taken into consideration when anticipating and managing future groundwater flood events. The approach presented is generic and parsimonious and can be easily applied where sufficient groundwater level and rainfall data are available.
引用
收藏
页码:4586 / 4599
页数:14
相关论文
共 72 条
  • [1] An early warning system for groundwater flooding in the Chalk
    Adams, B.
    Bloomfield, J. P.
    Gallagher, A. J.
    Jackson, C. R.
    Rutter, H. K.
    Williams, A. T.
    [J]. QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, 2010, 43 (02) : 185 - 193
  • [2] Adams B., 2008, FLOOD 1 FINAL REPORT, P75
  • [3] The extreme runoff index for flood early warning in Europe
    Alfieri, L.
    Pappenberger, F.
    Wetterhall, F.
    [J]. NATURAL HAZARDS AND EARTH SYSTEM SCIENCES, 2014, 14 (06) : 1505 - 1515
  • [4] Allen D., 1997, The physical properties of major aquifers in England and Wales, P333
  • [5] [Anonymous], 1993, 8 C APPL CLIMATOLOGY
  • [6] [Anonymous], 1990, STAT METHODS SOIL LA
  • [7] Impacts of extreme flooding on riverbank filtration water quality
    Ascott, M. J.
    Lapwortha, D. J.
    Gooddy, D. C.
    Sage, R. C.
    Karapanos, I.
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2016, 554 : 89 - 101
  • [8] Regional analysis of groundwater droughts using hydrograph classification
    Bloomfield, J. P.
    Marchant, B. P.
    Bricker, S. H.
    Morgan, R. B.
    [J]. HYDROLOGY AND EARTH SYSTEM SCIENCES, 2015, 19 (10) : 4327 - 4344
  • [9] Analysis of groundwater drought building on the standardised precipitation index approach
    Bloomfield, J. P.
    Marchant, B. P.
    [J]. HYDROLOGY AND EARTH SYSTEM SCIENCES, 2013, 17 (12) : 4769 - 4787
  • [10] Some relationships between lithology, basin form and hydrology: a case study from the Thames basin, UK
    Bloomfield, J. P.
    Bricker, S. H.
    Newell, A. J.
    [J]. HYDROLOGICAL PROCESSES, 2011, 25 (16) : 2518 - 2530