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Characterisation of sedimentary structure and hydraulic behaviour within the unsaturated zone of the Triassic Sherwood Sandstone aquifer in North East England

By Steven William Truss


A study of the sedimentological framework and permeability characteristics of the Sherwood Sandstone has been undertaken together with a detailed investigation of moisture migration in the vadose zone at a single field site. Sedimentary structure and likely permeability variations were studied by use of laboratory grainsize analysis, logging of nearby outcrops, borehole geophysics and Ground Penetrating Radar (GPR). GPR is ideal for vadose zone hydrogeological applications as the majority of the features imaged are visible to radar as a result of variations in capillary, held moisture, and the amount of capillary retention is controlled by the size of the pore throats in the sediments, which directly influences their\ud permeability properties. Combined use of GPR, reconstruction of sedimentary facies and quantification of permeability characteristics has provided detailed 3D models of the sedimentary subsurface.\ud \ud Time Domain Reflectometry (TDR) was used to monitor water movement within the Sherwood Sandstone at a site near Selby in Yorkshire, creating a vertical and lateral profile of\ud groundwater movement within the unsaturated zone. Moisture content has also been monitored using a neutron probe, and a commercially-available portable packer system,\ud which have provided verification of the accuracy of the custom-made TDR system. The TDR installations consisted of automated arrays of TDR probes, permanently installed upon\ud borehole packers at varying depths, and these have provided moisture content data of a high temporal resolution. The TDR system has allowed monitoring of seasonal moisture variation under natural rainfall loading, and the results have been interpreted in order to gain a better\ud understanding of groundwater migration at a different scale to data previously available.\ud \ud The bulk of the rock in the Sherwood Sandstone aquifer study area consists of relatively permeable medium-grained sandstones. However, results suggest that vertical flow in the unsaturated zone may be impeded by the presence of relatively impermeable fine sandstone units, which correspond to bar top and slack water environments, and occasional mudstone layers representing overbank deposits. This restriction to vertical flow may cause localized\ud perched aquifer conditions, which provide sufficient hydrostatic head to initiate horizontal migration in the overlying rock. Modelling of real rainfall events suggests that 25% of the water present in the perched aquifer layers undergoes lateral or bypass flow (i. e. it drains\ud laterally rather than through the fine-grained layers). In the saturated zone, the horizontal flow of groundwater in the Sherwood Sandstone aquifer is likely to be dominantly via the relatively coarse, trough-stratifed sandstone layers, so that a low proportion of the total aquifer porosity may provide a route for rapid contaminant transport

Publisher: School of Earth and Environment (Leeds)
Year: 2004
OAI identifier: oai:etheses.whiterose.ac.uk:396

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  1. (1995). 250 S236 Geology Block 6, Historical Geology Revised edition,
  2. 3-D characterization of a clastic reservoir analog: From 3-D GPR data to a 3-D fluid permeability model. doi
  3. 7755-3.1.1994. Soil Quality, Part 3: Chemical methods- Section 3.1. Determination of dry matter and water content on a mass basis by a gravimetric method British Standards Institution (BSI). doi
  4. 7755-5.2.1996. Soil Quality, Part 5: Physical methods- Section 5.2.. Determination of water content in the unsaturated zone- Neutron depth probe method. British Standards Institution (BSI). doi
  5. (1980). A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, doi
  6. (1986). A method of measuring soil moisture by time-domain reflectometry. doi
  7. (1993). A new geological map of the Brabant Massif, doi
  8. (1991). A time domain reflectometry packer for use in rock. in Proc. The second international symposium and workshop on Time Domain Re, flectometry for geotechnical applications.
  9. (2002). An integrated geophysical investigation into the hydrogeology of an anisotropic unconfined aquifer. doi
  10. (1988). An introduction to applied and environmental geophysics
  11. (1991). An Introduction to Geophysical Exploration,
  12. (2003). an introduction to the origin of sedimentary rocks Second edition Blackwell Science,
  13. (1981). Application in agriculture, forestry and environmental science in Greacen,
  14. (2003). Architecture of channel belt deposits in an aggrading shallow sandbed braided river: the lower Niobrara River, northeast Nebraska. Sedimentary Geology. doi
  15. (1985). Atlas of onshore sedimentary basins in England and Wales. Blackie,
  16. (1978). bar types in the South Saskatchewan River. doi
  17. (1993). Braided rivers: perspectives and problems. In Braided Rivers (Eds. doi
  18. BS ISO 11461.2001. -Soil quality-. Determination of water content as a volume fraction using coring sleeves- gravimetric method. British Standards Institution (BSI). doi
  19. (1984). Changes in the organic fraction of leachate from two domestic refuse sites on the Sherwood Sandstone, doi
  20. (1998). chemical hydrogeology. 2 "d Ed.
  21. (1995). Comparison of time domain reflectometry performance factors for several dielectric geometries: Theory and experiments. doi
  22. (2002). Comparison of travel time analysis and inverse modelling for soil water content determination with time domain reflectometry. doi
  23. Crevasse splays from the rapidly aggrading, sand bed, braided Niobrara River, Nebraska: effect of base level rise. doi
  24. (2001). Cross borehole radar and resistivity tomography: a comparison of techniques in unsaturated sandstone. ' In: doi
  25. (2003). Depositional models for braided rivers. (In Review), In; Braided Rivers (Eds. doi
  26. (2001). Detailed internal architecture of a fluvial channed sandstone determined from outcrop, cores, and 3-D ground penetrating radar: Example from the Cretaceous Ferron Sandstone member, east central Utah. doi
  27. (2003). Drainage networks in soils. A concept to describe bypass-flow pathways. doi
  28. (1980). Electromagnetic determination of soil water content: Measurement in coaxial transmission lines. doi
  29. Elsevier Scientific Publishing Company, doi
  30. (1998). Estimating direct groundwater recharge using a simple water balance model -sensitivity to land surface parameters. doi
  31. (1997). Estimating transport parameters in an undisturbed soil column using time domain reflectometry and transfer function theory. doi
  32. (1978). Facies, facies models and modem stratigraphic concepts.
  33. (1979). Geology of the country around Goole, Doncaster and the Isle ofAxholme. Memoir for one-inch sheets 79 and 88
  34. geomorphic controls on the fluvial styles of the Eslida Formation, Middle Triassic, doi
  35. (1995). Ground penetrating antennae frequencies and transmission powers compared for penetration depth, resolution and reflection continuity. Geophysical Prospecting. doi
  36. (1997). Ground penetrating radar for determining volumetric soil water content: Results of comparative measurements at two test sites. doi
  37. (1989). Ground penetrating radar for high resolution mapping of soil and rock stratigraphy. doi
  38. (2002). Ground penetrating radar: 2-D and 3-D subsurface imaging of a coastal barrier spit, doi
  39. (1981). Ground-penetrating radar simulation in engineering and archaeology Geophysics, vol 59-2, doi
  40. (2000). Groundwater vulnerability of the Triassic Sandstone Aquifer in the Selby area, North Yorkshire, Unpublished PhD thesis,
  41. High resolution characterisation of vadose zone dynamics in the Sherwood Sandstone using cross-borehole radar. doi
  42. Holocene avulsion styles and sedimentation patterns of the Saskatchewan River, doi
  43. (1998). Hydrogeological and geotechnical rock property characterization from geophysics. doi
  44. (1974). Hydrogeology of the Keuper sandstone in the Droitwich syncline area -Worcestershire. Unpublished PhD thesis,
  45. (1999). hydrogeology of two braided stream deposits. doi
  46. (2000). Identifying causes of ground penetrating radar reflections using time domain reflectometry and sedimentological analyses. doi
  47. (1996). Improving the calibration of dielectric TDR soil moisture determination taking into account the solid soil. doi
  48. (2000). Interpreting the dimensions of ancient fluvial channel bars, channels, and channel belts from wireline-logs and cores. doi
  49. (2002). Investigation of the unsaturated zone in the Sherwood Sandstone using petrophysical and geophysical monitoring methods. Unpublished PhD thesis,
  50. (1982). Joint Association for Petroleum Exploration Courses (UK) (JAPEC).
  51. (1992). Locating the Sherwood Sandstone Aquifer with the aid of resistivity surveying in the Vale of York.
  52. (1996). Long-term monitoring of non-contained landfills: Burntstump and Gorsethorpe on the Sherwood Sandstone. Final Report to the Department of the Environment.
  53. (1990). Measurement of relative permittivity in sandy soils using TDR, capacitance and theta probes, comparison, including the effects of bulk soil electrical conductivity. doi
  54. (1998). Monitoring soil water and ionic solute distributions using time-domain reflectometry. doi
  55. (1997). Morphological evolution and dynamics of a large, sand braid bar,
  56. (1998). Natural gamma logging. doi
  57. (2000). New Time Domain Reflectometry sensors for water content determination in porous media. doi
  58. Nirex Report SA/97/023,1997. Sellafield Geological and Hydrogeological Investigations. Sedimentology and sedimentary architecture of the St Bees Sandstone Formation in West Cumbria. United Kingdom Nirex Limited.
  59. (1993). Noninvasive time domain reflectometry moisture measurement probe. Soil Sci. doi
  60. (1988). Noninvasive water content and electrical conductivity laboratory measurements using time domain reflectometry. doi
  61. (2001). Observations of Seasonal Dynamics in the Vadose Zone using Borehole Radar and Resistivity. In: doi
  62. (1995). Outcrop gamma ray logging and its applications: examples from the German Triassic. doi
  63. (1993). Palaeozoic cooling and uplift of the Brabant Massif as revealed by apatite fission track analysis. doi
  64. (1990). percolation study of preferential flow in vadose zone at Bokhorst, doi
  65. (1989). Permo-Triassic fluvial sediments of the Sherwood Sandstone Group in the Bawtry-Selby area of South Yorkshire and Nottinghamshire. 28`h Annual General Meeting of the British Sedimentological Research Group BSRG,
  66. (2001). Petroleum Geology of the North Sea, 4`" Edition. Blackwell Science Ltd,
  67. (2003). Petrophysical characterisation of the Sherwood Sandstone from East Yorkshire. In: The Permo-Triassic Sandstones (Eds. Marker doi
  68. (2002). Pore throat size distributions in Permo-Triassic sandstones from the United Kingdom and some implications for contaminant hydrology. doi
  69. (1995). Precision of neutron scattering and capacitance type soil water gauges from field calibration. doi
  70. (1998). Radar facies of unconsolidated sediments in the Netherlands: A radar stratigraphy interpretation method for hydrogeology. doi
  71. (1997). Radar facies: recognition of facies patterns and heterogeneities within Pleistocene Rhine Gravels, NE Switzerland. In: doi
  72. Radar frequency dielectric dispersion in sandstone: Implications for determination of moisture and clay content. doi
  73. (1999). Revealing stratigraphy in ground penetrating radar using domain filtering. doi
  74. (2001). Sediment filled fractures in the Permo-Triassic sandstones of the Cheshire Basin: observations and implications for pollutant transport. doi
  75. (2000). sediment transport and alluvial channel pattern. doi
  76. (1993). Sedimentary structures exposed in bar tops in the Brahmaputra River, Bangladesh. In Braided Rivers (Eds. doi
  77. (1998). Seismic reflection and ground penetrating radar imaging of a shallow aquifer. doi
  78. (1985). Seismic reflection in investigations into the stratigraphy and structural evolution of the Worcester Basin. doi
  79. (1992). Sensitivity of time domain reflectometry measurements to lateral variations in soil water content. doi
  80. (2000). Soil water assessment by the neutron method. doi
  81. (1994). Source, Type and Extent of inorganic contamination within the Birmingham urban aquifer system, doi
  82. (1997). Structures within the surge front at Bakaninbreen, Svalbard, using Ground -penetrating radar.
  83. (1993). Tectonic and stratigraphic aspects of the East Irish Sea Basin and adjacent areas: contrasts in their post-Carboniferous structural styles. In doi
  84. (1994). Telemetric and multiplexing enhancement of TDR measurements. In:
  85. (1979). Texture and recognition of secondary porosity in sandstones. doi
  86. (1993). The Caledonides of the Anglo-Brabant Massif reviewed. Geology Magazine. doi
  87. (1995). The chemistry and origin of groundwater in Triassic sandstone and Quaternary deposits, northwest England and some UK comparisons. doi
  88. (1999). The control of sedimentary facies by climate during phases of crustal extension: examples from the Triassic of onshore and offshore England and Ireland. doi
  89. The East Midlands Triassic Aquifer: hydrogeochemical evolution 19 75-1992 British Geological Survey
  90. (1975). The electromagnetic response of a low-loss, two layer, dielectric earth for horizontal dipole excitation. doi
  91. (1998). The Environment of England and Wales, a Snapshot. Environment Agency, doi
  92. (1993). The interaction between channel geometry, water flow, sediment transport and deposition in braided rivers. From doi
  93. (1996). The Open University, Milton Keynes.
  94. (1993). The Permian to Jurassic stratigraphy and structural evolution of the central Cheshire Basin. doi
  95. (1997). The physical properties of major aquifers in England and Wales. British Geological Survey, technical report WD/97/34,
  96. (2002). The physical scale modelling of braided alluvial architecture and estimation of subsurface permeability. doi
  97. (1979). The role of secondary porosity in sandstones. doi
  98. The sedimentary structure of linear sand dunes. doi
  99. (1989). The spatial sensitivity of time-domain reflectometry. doi
  100. (2003). The use and application of ground penetrating radar in sandy fluvial environments: methodological considerations, in doi
  101. (1999). The Wakefield District- a concise account of the geology. Memoir of the British Geological Survey, Sheet 78 (England and Wales). The Stationery Office, London.
  102. (2003). Three-dimensional architecture of a large, mid-channel sand braid bar, doi
  103. (1999). Time domain reflectometry coil probe measurements of water content during fingered flow. Soil Sci. doi
  104. (1999). Towards realistic aquifer models: three-dimensional georadar surveys of Quaternary gravel deltas (Singen Basin, doi
  105. (1998). Water content response of a profiling time domain reflectometry probe. doi

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