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Seven hydrogeological terrains characteristic of southern Ontario
Sharpe, D. R
Canadian journal of earth sciences, 2022-12, Vol.59 (12), p.1006-1030
[Periódico revisado por pares]
Ottawa: National Research Council of Canada
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Título:
Seven hydrogeological terrains characteristic of southern Ontario
Autor:
Sharpe, D. R
Assuntos:
aquifers
;
basins
;
Bedrock
;
Canada
;
Carbonates
;
Climate
;
Climate change
;
Climatic analysis
;
digital elevation models
;
discharge
;
Eastern Canada
;
Future climates
;
Geologic mapping
;
Geological mapping
;
Geological maps
;
Geology
;
Gradients
;
Gravel
;
ground water
;
Groundwater
;
Groundwater data
;
Groundwater flow
;
Groundwater levels
;
Hydrogeology
;
Hydrologic cycle
;
Hydrological cycle
;
Hydrology
;
land
management
;
Landscape
;
Management
;
Ontario
;
Paleozoic
;
Permeability
;
Porosity
;
Resource
management
;
Sediment
;
sedimentary basins
;
Sediments
;
southern Ontario
;
Stream discharge
;
Stream flow
;
streamflow
;
Surface water
;
terrains
;
Topography
;
Water
;
Water discharge
;
water
management
;
water resources
;
Water supply
;
Watersheds
É parte de:
Canadian journal of earth sciences, 2022-12, Vol.59 (12), p.1006-1030
Descrição:
Groundwater is an important component of the hydrological cycle of southern Ontario, significant to water supply and discharge to surface water. To improve overall understanding of key hydrological mechanisms, a proof-of-concept framework is presented that consists of seven typical terrains or hydrogeological settings. Geologic and topographic controls influence each setting as recorded by climate, streamflow, and groundwater level data, which trace how water moves through various parts of the southern Ontario landscape. This hydrogeological framework considers the geology of surface sediment and bedrock, permeability and porosity (inferred), physiography, and topographic gradients to define seven distinctive hydrogeological terrains. The data and watershed selection process allow for concentration on patterns of hydrologic response across the landscape, with less focus on hydrologic accounting of the terrain. The analysis identifies events in climate, stream, and well-monitoring data indicative of influxes and temporal patterns of hydrological and hydrogeological response to local geology and topography, thus differentiating styles of groundwater movement in sediment/bedrock landscapes of the Paleozoic basin and Shield margin. A case study is provided for each setting: five in sediment (clay, sand, gravel, till upland, and thick till); and two in bedrock (crystalline and carbonate). The selected hydrogeological terrains characterize ∼90% of the landscape based on a simplified geological map of southern Ontario. The main hydrogeological characteristics and behaviour of these terrains are proposed as a set of conceptual models representative of near-surface groundwater regimes. Such models can inform water and land resource management as future climates change.
Editor:
Ottawa: National Research Council of Canada
Idioma:
Inglês
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