The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
M. C. English - One of the best experts on this subject based on the ideXlab platform.
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Riparian zone equilibrium and actual evapotranspiration in a first order agricultural catchment in Southern Ontario, Canada
Agricultural Water Management, 2006Co-Authors: R. M. Petrone, C. Smith, Merrin L. Macrae, M. C. EnglishAbstract:Abstract Agricultural Landcapes are typically comprised of a mosaic of Land Uses, some of which include riparian areas. While the active management of riparian water resources may not be the primary objective of many agricultural water managers, the importance of riparian zone evapotranspiration (ET) to over all basin water losses and water quality has been stressed in the literature. However, ET from these areas is rarely known with great certainty. To this end micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing micro-lysimeters (18,716 cm3) at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled equilibrium evapotranspiration (PETEQ) and measured actual evapotranspiration (AET) values obtained from the lysimeters in riparian zone in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the range in surface conditions dominant throughout the basin. The results yield a mean daily AET of 3.43 mm for the catchment's riparian zone, with virtually no differences between the upper and lower portions of the basin, which lost 3.36 and 3.49 mm d−1, respectively. Using these daily AET values along with coincident estimates of PETEQ produced Priestley–Taylor coefficients (α) of 1.10 and 1.18 at the upper and lower sites, respectively.
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Variability in riparian zone potential and actual evapotranspiration in a 1 st order agricultural catchment in Southern Ontario, Canada
2005Co-Authors: R. M. Petrone, C. Smith, M. C. EnglishAbstract:Micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing lysimeters at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled potential evapotranspiration (PET) and measured actual evapotranspiration (AET) values obtained from the soil weighing lysimeters, and determines the spatial variability in riparian zone AET in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the surface conditions dominant in the upper and lower reaches of the basin. The results indicated that AET was higher in the northern end of the basin than in the southern portion of the basin, while the hydrological and energy balance components were similar at both sites. The caUses of the different rates are attributed to the surrounding vegetation on adjacent fields and the differing wind regimes.
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Variability in riparian zone potential and actual evapotranspiration in a 1st order agricultural catchment in Southern Ontario, Canada
Hydrology and Earth System Sciences Discussions, 2002Co-Authors: R. M. Petrone, C. Smith, M. C. EnglishAbstract:Micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing lysimeters at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled potential evapotranspiration (PET) and measured actual evapotranspiration (AET) values obtained from the soil weighing lysimeters, and determines the spatial variability in riparian zone AET in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the surface conditions dominant in the upper and lower reaches of the basin. The results indicated that AET was higher in the northern end of the basin than in the southern portion of the basin, while the hydrological and energy balance components were similar at both sites. The caUses of the different rates are attributed to the surrounding vegetation on adjacent fields and the differing wind regimes.
Jason G. Kerr - One of the best experts on this subject based on the ideXlab platform.
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Multiple Land Use activities drive riverine salinization in a large semi arid river basin in western canada
Limnology and Oceanography, 2017Co-Authors: Jason G. KerrAbstract:Salinization is increasingly recognized as a global issue. However, the relative importance of different drivers across a broad range of ions and ecosystems is not well understood. This study examined spatial and temporal dynamics in riverine salinity (conductivity, Ca2+, Mg2+, Na+, K+, SO42−, Cl− and HCO3−) in the South Saskatchewan River Basin (SSRB), a semi-arid, mixed Land Use watershed in Alberta, Canada. A significant temporal increase (p < 0.05) in the concentration of one or more ions was observed at all 12 study sites. While all ions exhibited a significant increase in concentration over time, the rate of change was generally highest for Cl− (≈ 1.4–3.0% yr−1). The observed increase in riverine Cl− loading downstream of a large urban center (≈ 1700 tonnes yr−1) was attributed to increasing inputs from road salt (≈ 1800 tonnes yr−1) and to a lesser extent municipal wastewater (≈ 400 tonnes yr−1). For most other salts, spatial variation was driven not by urbanization but by the proportion of salt affected soils and/or cropLand. A distinct Na2SO4 signal was observed at stations draining salt affected soils which strengthened over time at 7/12 sites indicating temporal trends in Na+ and SO42− have been driven largely by soil processes. A strong relationship between cropLand and salt chemistry across the basin suggests agricultural activities have also contributed to observed trends. Therefore, in regions with similar climatic and anthropogenic characteristics to the SSRB, Multiple stressors are likely to be operating and as such, these systems may be at particular risk from salinization.
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Multiple Land Use activities drive riverine salinization in a large, semi‐arid river basin in western Canada
Limnology and Oceanography, 2017Co-Authors: Jason G. KerrAbstract:Salinization is increasingly recognized as a global issue. However, the relative importance of different drivers across a broad range of ions and ecosystems is not well understood. This study examined spatial and temporal dynamics in riverine salinity (conductivity, Ca2+, Mg2+, Na+, K+, SO42−, Cl− and HCO3−) in the South Saskatchewan River Basin (SSRB), a semi-arid, mixed Land Use watershed in Alberta, Canada. A significant temporal increase (p
R. M. Petrone - One of the best experts on this subject based on the ideXlab platform.
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Riparian zone equilibrium and actual evapotranspiration in a first order agricultural catchment in Southern Ontario, Canada
Agricultural Water Management, 2006Co-Authors: R. M. Petrone, C. Smith, Merrin L. Macrae, M. C. EnglishAbstract:Abstract Agricultural Landcapes are typically comprised of a mosaic of Land Uses, some of which include riparian areas. While the active management of riparian water resources may not be the primary objective of many agricultural water managers, the importance of riparian zone evapotranspiration (ET) to over all basin water losses and water quality has been stressed in the literature. However, ET from these areas is rarely known with great certainty. To this end micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing micro-lysimeters (18,716 cm3) at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled equilibrium evapotranspiration (PETEQ) and measured actual evapotranspiration (AET) values obtained from the lysimeters in riparian zone in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the range in surface conditions dominant throughout the basin. The results yield a mean daily AET of 3.43 mm for the catchment's riparian zone, with virtually no differences between the upper and lower portions of the basin, which lost 3.36 and 3.49 mm d−1, respectively. Using these daily AET values along with coincident estimates of PETEQ produced Priestley–Taylor coefficients (α) of 1.10 and 1.18 at the upper and lower sites, respectively.
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Variability in riparian zone potential and actual evapotranspiration in a 1 st order agricultural catchment in Southern Ontario, Canada
2005Co-Authors: R. M. Petrone, C. Smith, M. C. EnglishAbstract:Micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing lysimeters at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled potential evapotranspiration (PET) and measured actual evapotranspiration (AET) values obtained from the soil weighing lysimeters, and determines the spatial variability in riparian zone AET in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the surface conditions dominant in the upper and lower reaches of the basin. The results indicated that AET was higher in the northern end of the basin than in the southern portion of the basin, while the hydrological and energy balance components were similar at both sites. The caUses of the different rates are attributed to the surrounding vegetation on adjacent fields and the differing wind regimes.
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Variability in riparian zone potential and actual evapotranspiration in a 1st order agricultural catchment in Southern Ontario, Canada
Hydrology and Earth System Sciences Discussions, 2002Co-Authors: R. M. Petrone, C. Smith, M. C. EnglishAbstract:Micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing lysimeters at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled potential evapotranspiration (PET) and measured actual evapotranspiration (AET) values obtained from the soil weighing lysimeters, and determines the spatial variability in riparian zone AET in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the surface conditions dominant in the upper and lower reaches of the basin. The results indicated that AET was higher in the northern end of the basin than in the southern portion of the basin, while the hydrological and energy balance components were similar at both sites. The caUses of the different rates are attributed to the surrounding vegetation on adjacent fields and the differing wind regimes.
C. Smith - One of the best experts on this subject based on the ideXlab platform.
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Riparian zone equilibrium and actual evapotranspiration in a first order agricultural catchment in Southern Ontario, Canada
Agricultural Water Management, 2006Co-Authors: R. M. Petrone, C. Smith, Merrin L. Macrae, M. C. EnglishAbstract:Abstract Agricultural Landcapes are typically comprised of a mosaic of Land Uses, some of which include riparian areas. While the active management of riparian water resources may not be the primary objective of many agricultural water managers, the importance of riparian zone evapotranspiration (ET) to over all basin water losses and water quality has been stressed in the literature. However, ET from these areas is rarely known with great certainty. To this end micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing micro-lysimeters (18,716 cm3) at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled equilibrium evapotranspiration (PETEQ) and measured actual evapotranspiration (AET) values obtained from the lysimeters in riparian zone in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the range in surface conditions dominant throughout the basin. The results yield a mean daily AET of 3.43 mm for the catchment's riparian zone, with virtually no differences between the upper and lower portions of the basin, which lost 3.36 and 3.49 mm d−1, respectively. Using these daily AET values along with coincident estimates of PETEQ produced Priestley–Taylor coefficients (α) of 1.10 and 1.18 at the upper and lower sites, respectively.
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Variability in riparian zone potential and actual evapotranspiration in a 1 st order agricultural catchment in Southern Ontario, Canada
2005Co-Authors: R. M. Petrone, C. Smith, M. C. EnglishAbstract:Micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing lysimeters at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled potential evapotranspiration (PET) and measured actual evapotranspiration (AET) values obtained from the soil weighing lysimeters, and determines the spatial variability in riparian zone AET in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the surface conditions dominant in the upper and lower reaches of the basin. The results indicated that AET was higher in the northern end of the basin than in the southern portion of the basin, while the hydrological and energy balance components were similar at both sites. The caUses of the different rates are attributed to the surrounding vegetation on adjacent fields and the differing wind regimes.
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Variability in riparian zone potential and actual evapotranspiration in a 1st order agricultural catchment in Southern Ontario, Canada
Hydrology and Earth System Sciences Discussions, 2002Co-Authors: R. M. Petrone, C. Smith, M. C. EnglishAbstract:Micrometeorological and hydrological measurements were made over one growing season using automatic weather stations and weighing lysimeters at several locations within a Multiple Land-Use agricultural catchment in Southern Ontario. This paper compares modelled potential evapotranspiration (PET) and measured actual evapotranspiration (AET) values obtained from the soil weighing lysimeters, and determines the spatial variability in riparian zone AET in a Multiple Land-Use agricultural watershed in Southern Ontario. Two sites were chosen in two different riparian areas of the watershed, representing the surface conditions dominant in the upper and lower reaches of the basin. The results indicated that AET was higher in the northern end of the basin than in the southern portion of the basin, while the hydrological and energy balance components were similar at both sites. The caUses of the different rates are attributed to the surrounding vegetation on adjacent fields and the differing wind regimes.
Camilla Sandström - One of the best experts on this subject based on the ideXlab platform.
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Measuring Transaction Costs for Pastoralists in Multiple Land Use Situations: Reindeer Husbandry in Northern Sweden
Land Economics, 2015Co-Authors: Göran Bostedt, Camilla Widmark, Mats Andersson, Camilla SandströmAbstract:Analysis of transaction costs in Multiple Land Use situations is helpful in policymaking and Land Use management, especially in natural resource management situations where interdependence prevails ...
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Measuring transaction costs incurred by Landowners in Multiple Land-Use situations
Land Use Policy, 2013Co-Authors: Camilla Widmark, Göran Bostedt, Mats Andersson, Camilla SandströmAbstract:This paper describes the development and implementation of a method to measure the transaction costs in situations of Multiple Land-Use, where the actions of one actor have negative effects on the ...