Comparing approaches for modeling spatially distributed direct recharge in a semi-arid region (Okanagan Basin, Canada)

Liggett, Jessica E.; Allen, D. M.

doi:10.1007/s10040-009-0512-5

Cited by 18 publications

(18 citation statements)

References 23 publications

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“…LAI values were estimated from 30‐m‐resolution Landsat imagery (5 TM and 7 ETM+) and auxiliary satellite sensors (SPOT‐4 VEG) by Fernandes et al (2003). Liggett and Allen (2010) found that 87% of the Okanagan Basin had LAI values of < 2, and grouped LAI values into the categories of 0·5 and 3·5. For each of these LAI groups, rooting zone depths were assumed to be 0·5, 1·0, or 2·0 m, depending on land cover type (e.g.…”

Section: Methodsmentioning

confidence: 99%

“…Spatial variations in land cover information and soil properties can be readily compiled in GIS‐based computer programs for use in many different hydrological analysis (e.g. Jyrkama et al , 2002) and at varying scales of interest (Liggett and Allen, 2010). However, similar treatment of spatially distributed meteorological variables can be complicated by the need to honour larger scale governing synoptic patterns that originate beyond the basin or watershed scale (Toews et al , 2009) and when working with data extracted from a global climate model (GCM).…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the use of a gridded climate surface for modelling groundwater recharge in a semi‐arid region (Okanagan Basin, Canada)

Smerdon¹,

Allen²,

Neilsen³

2010

Hydrological Processes

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Abstract:Spatially distributed groundwater recharge was simulated for a segment of a semi-arid valley using three different treatments of meteorological input data and potential evapotranspiration (PET). For the same area, timeframe, land cover characteristics and soil properties, groundwater recharge was estimate using (i) single-station climate data with monthly PET calculated by the Thornthwaite method; (ii) single-station climate data with daily PET calculated by the Penman-Monteith method; and (iii) daily gridded climate data with spatially distributed PET calculated using the Penman-Monteith method. For each treatment, the magnitude and distribution of actual evapotranspiration (AET) for summer months compared well with those estimated for a 5-year crop study, suggesting that the near-surface hydrological processes were replicated and that subsequent groundwater recharge rates are realistic. However, for winter months, calculated AET was near zero when using the Thornthwaite PET method. Mean annual groundwater recharge varied from ¾3Ð2 to 10Ð0 mm when PET was calculated by the Thornthwaite method, and from ¾1Ð8 to 7Ð5 mm when PET was calculated by the Penman-Monteith method. Comparisons of bivariate plots of seasonal recharge rates estimated from single-station versus gridded surface climate reveal that there is greater variability between the different methods for spring months, which is the season of greatest recharge. Furthermore, these seasonal differences are shown to provide different results when compared to the depth to water table, which could lead to different results of evaporative extinction depth. These findings illustrate potential consequences of using different approaches for representing spatial meteorological input data, which could provide conflicting predictions when modelling the influence of climate change on groundwater recharge.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating the use of a gridded climate surface for modelling groundwater recharge in a semi‐arid region (Okanagan Basin, Canada)

Smerdon¹,

Allen²,

Neilsen³

2010

Hydrological Processes

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“…CMB provides long-term averages under steady state conditions and is more convenient for regional scale estimations, like aquifer or basin scale, although sub-regional applications are also successful. The joint use and comparison of both methods are desirable (Liggett and Allen, 2010;Varni and Custodio, 2013;Touhami et al, 2014). Sub-regional scale estimates are not representative of an entire aquifer or basin, while regional estimates allow obtaining information on spatial variability.…”

Section: Introductionmentioning

confidence: 99%

Integrating soil water and tracer balances, numerical modelling and GIS tools to estimate regional groundwater recharge: Application to the Alcadozo Aquifer System (SE Spain)

Hornero

Manzano

Ortega

et al. 2016

Science of The Total Environment

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“…Aquifer types in the province have been classified [3] and various investigations have employed case-study type approaches to determine the status of groundwater resources, developed rigorous quantitative models of representative aquifers with predictive capacity, and attempted to assess future changes due to natural and/or anthropogenic forcings (see, e.g., ref. [4][5][6][7][8][9][10][11][12][13][14][15][16] and references therein). In our previous work, we examined temporal trends in groundwater monitoring wells for the western Canada prairie province of Saskatchewan [17].…”

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confidence: 99%

Historical temporal trends in groundwater levels from British Columbia, Canada

Rayne

Forest

2012

Nature Precedings

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(S. Rayne).Management of groundwater quantity and quality is an important resource development issue in Canada [1]. Overuse and/or contamination of groundwater supplies has the potential to restrict future use of this resource [2]. In the western Canadian coastal province of British Columbia, increasing attention is being paid to the scientific and legislative/regulatory aspects of surface and groundwaters. Aquifer types in the province have been classified [3] and various investigations have employed case-study type approaches to determine the status of groundwater resources, developed rigorous quantitative models of representative aquifers with predictive capacity, and attempted to assess future changes due to natural and/or anthropogenic forcings (see, e.g., ref. [4][5][6][7][8][9][10][11][12][13][14][15][16] and references therein). In our previous work, we examined temporal trends in groundwater monitoring wells for the western Canada prairie province of Saskatchewan [17]. We found that groundwater resources in this region generally appear to be increasing over time and do not appear to be under current threat from depletion. As part of the current study, we have conducted a similar investigation on time trends for groundwater monitoring well levels in British Columbia.Groundwater data was obtained from the British Columbia Ministry of Environment online Groundwater Observation Well Network database [18]. Trend data is available for a total of 210 groundwater monitoring well stations throughout the province (Figure 1 and Table 1) with end-of-month water levels (presented as meters below ground surface) over the period of record. Substantial end-ofmonth water level data gaps are present throughout the available historical record for the large majority of monitoring wells. At many sites, significant interannual variability in water levels is expected to have occurred due to natural and/or anthropogenic causes, precluding reliable reconstruction of complete inter-and intraannual monthly well level records using interpolative techniques. Consequently, the dataset was screened and correspondingly reduced to only include years with a complete set of monthly records. Average annual groundwater levels were calculated as the mean of the twelve individual endof-month groundwater levels for each year over the resulting usable historical record at each site. Temporal trends in average annual groundwater levels at each site were examined using standard parametric linear regression [19].Of the 210 groundwater monitoring well stations, 166 stations (79.0%) contained records of greater than two years (Table 2). The remaining stations had either 0, 1, or 2 years of complete annual records, and were not considered further. The average usable record length is 9.5 years with a standard deviation of 8.2 years and a range from 0 to 39 years. The majority (62.4%) of the usable record lengths are between 0 and 10 years, with 10% of the records at 0 years ( Figure 2). Only 10% of the records are longer than 21 years, and 1% of the ...

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Comparing approaches for modeling spatially distributed direct recharge in a semi-arid region (Okanagan Basin, Canada)

Cited by 18 publications

References 23 publications

Evaluating the use of a gridded climate surface for modelling groundwater recharge in a semi‐arid region (Okanagan Basin, Canada)

Evaluating the use of a gridded climate surface for modelling groundwater recharge in a semi‐arid region (Okanagan Basin, Canada)

Integrating soil water and tracer balances, numerical modelling and GIS tools to estimate regional groundwater recharge: Application to the Alcadozo Aquifer System (SE Spain)

Historical temporal trends in groundwater levels from British Columbia, Canada

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