Application of the Priestley-Taylor evaporation model to assess the influence of soil moisture on the evaporation from a large weighing lysimeter and class a pan

Mukammal, E. I.; Neumann, H. H.

doi:10.1007/bf00121976

Cited by 37 publications

(15 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The CY values for the clear-cut site are similar in rnagnitude to those reported by a number of other workers for similar short canopies under wet, dry, and all conditions (Wilson and Rouse 1972;Davies and Allen 1973;Mukammal and Neumann 1977). The forest results indicate that, over a wide range of conditions, the equilibrium model overestimates actual evapotranspiration rates when the canopy is dry.…”

Section: Precipitation and Soil Moisture Regimesupporting

confidence: 83%

ENERGY EXCHANGE FOR A FOREST SITE and A CLEAR‐CUT SITE AT CHALK RIVER, ONTARIO

McCaughey

1989

Canadian Geographies / Géographies canadiennes

View full text Add to dashboard Cite

This article reports energy balance measurements which were made over a forest anda clear-cut site in the summer of 1985, and over the forest in 7987 at the Petawawa National Forestry institute (PNFI), Chalk River, Ontario.Evapotranspiration was evaluated by the Bowen ratio1 energy balance method using a model of the Reversing Temperature Difference Measurement System (RTDMS) at each site in each year. The evapotranspiration regimes of the forest and clear-cut sites are interpreted within the resistance framework of the Penman-Monteith combination model. The behaviour of the Priestley and Taylor (1972) [Y term and the McNaughton and Jarvis (1983) R factor are discussed for both sites. The summer of 1987 was exceptionally dry and thus provided an opportunity to examine the forest's evapotranspiration regime under severe water stress. The soil moisture conditions in 1987 are in marked contrast to those in 7985, a wetter year.Dans cette communication, on fait &at des mesures du bilan 6nergCtique prises, a 1985, au-dessus d'une region forestiere et d'une region de terrain debla ye de sa futaie et, en 7987, au-dessus de la m h e region foresitiere 21 I'lnstitut Forestier Nationalde Petawawa, A Chalk River, Ontario. Avec la methode du rapport de Bowenl bilan energetique, on a determine /'evapotranspiration en utilisant un dispositif de mesure de la difference de temperature a renversement dans chaque region pour chacune des annees. On interprete les regimes de I'6vapotranspiration de la region forestiere et de la r6gion de terrain deblaye de la futaie dans le cadre de la resistance du modele combine de Penman et Monteith. On discute la tenue du terme a de Priestley et Taylor ( 7 972) et du factor fl de McNaughton et iarvis (1983) pour toutes les r6gions. Le temps en 6t6 1987 etait exceptionnellement sec, favorisant I'examen d'un regime d'evapotranspiration sous des conditions de penurie deau. Les conditions de secheresse du sol font contraste avec celles de I'an 1985 qui etaient plus humides.Aspects of the energy balance of a mixed forest and a clear-cut area will be presented in this paper. Results are part of the work begun at PNFI in 1981. Comparisons of the energy balance of the forest and clear-cut sites using data from 1981 have been presented previously (McCaughey 1985a). Here, data from both 1985 and 1987 will be discussed. For 1985, data are available from both the forest and a clear-cut site; in 1987 only data from the forest are available. 1985 was a wet season, whereas 1987 was the driest since 1981. The marked contrast in rainfall in the two years provided an opportunity to study the role of water availability in the energy balance of the forest.Evapotranspiration rates were evaluated by the Bowen ratio/energy balance method, using reversing psychrometry and the direct measurement of temperature differences. The energy balance for both sites i s interpreted using the resistance framework of the Penman-Monteith combination model. The behaviour of the [Y term of the Priestley and Taylor (1972) model an...

show abstract

Section: Precipitation and Soil Moisture Regimesupporting

confidence: 83%

ENERGY EXCHANGE FOR A FOREST SITE and A CLEAR‐CUT SITE AT CHALK RIVER, ONTARIO

McCaughey

1989

Canadian Geographies / Géographies canadiennes

View full text Add to dashboard Cite

show abstract

“…This could be caused by a combination of heterogeneity in rainfall; local differences in responses from within the many upstream rivulets that still make up the upstream catchments; local storage areas not accounted for in my summary of land use; and differences in the absorption capabilities of vegetative cover over time. I hypothesize that the most likely cause of this finding is that at this grain size there remains considerable variation in plant cover and that differences in absorption rates are large as plants grow (Mukammal and Neuman 1977). At present we have no means of attributing individual vegetative cover types and thereby accounting for these potential differences.…”

Section: Significant Predictors Of Peak Dischargementioning

confidence: 84%

“…Mukammal and Neuman (1977), working north of Toronto, in proximity to my study area determined that actual evapotranspiration ranged from 1.0 to 6.5 mm/day. This effect has been demonstrated in several studies (Finch 1998 (2001) found that the greatest variability in the relationship between flows and forest cover is within the deciduous and mixed-deciduous forest types, common to this study area.…”

Section: Significant Predictors Of Peak Dischargementioning

confidence: 99%

Understanding the Factors That Influence Headwater Stream Flows in Response to Storm Events1

Stanfield

Jackson

2011

JAWRA Journal of the American Water Resources Association

View full text Add to dashboard Cite

Understanding the factors that influence headwater stream flows in response to storm events., headwater stream sites during a drought year. Highest discharges were observed in the most developed catchments and in the most poorly drained soils, but specific responses were variable depending on both geology and land disturbance. Redundancy analysis indicated that both surficial geology and land disturbance were important predictors of discharge and that rainfall was in general a poor predictor of discharge. I conclude that responses of headwater streams to individual storms are unpredictable from data generated using GIS, but increased peak flows occur associated with human development, mitigated by surficial geology. The headwater streams that are most vulnerable to flow alterations occur on poorly drained soils, and where urbanization tends to concentrate. Much greater attention to managing water is required if further degradation of stream ecosystems is to be prevented from our future land use.iii Acknowledgements:

show abstract

“…The value of α was seen to vary slightly around 1.26 in most of the previous studies (e.g., Davies and Allen, 1973;Mukammal and Neumann, 1977;Stewart and Rouse, 1977;Thompson, 1975). The α = 1.26 is also used here.…”

Section: Aa Modelmentioning

confidence: 99%

Applicability of three complementary relationship models for estimating actual evapotranspiration in urban area

Nakamichi

Moroizumi

2015

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

Abstract:The characteristics of evapotranspiration estimated by the complementary relationship actual evapotranspiration (CRAE), the advection-aridity (AA), and the modified advection-aridity (MAA) models were investigated in six pairs of rural and urban areas of Japan in order to evaluate the applicability of the three models the urban area. The main results are as follows: 1) The MAA model could apply to estimating the actual evapotranspiration in the urban area.2) The actual evapotranspirations estimated by the three models were much less in the urban area than in the rural.3) The difference among the estimated values of evapotranspiration in the urban areas was significant, depending on each model, while the difference among the values in the rural areas was relatively small. 4) All three models underestimated the actual evapotranspiration in the urban areas from humid surfaces where water and green spaces exist. 5) Each model could take the effect of urbanization into account.

show abstract

Application of the Priestley-Taylor evaporation model to assess the influence of soil moisture on the evaporation from a large weighing lysimeter and class a pan

Cited by 37 publications

References 5 publications

ENERGY EXCHANGE FOR A FOREST SITE and A CLEAR‐CUT SITE AT CHALK RIVER, ONTARIO

ENERGY EXCHANGE FOR A FOREST SITE and A CLEAR‐CUT SITE AT CHALK RIVER, ONTARIO

Understanding the Factors That Influence Headwater Stream Flows in Response to Storm Events1

Applicability of three complementary relationship models for estimating actual evapotranspiration in urban area

Contact Info

Product

Resources

About