Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA

David M. Sumner, C.M.J. Jacobs

Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

Abstract

An areally-integrated assessment of ET ux was obtained using eddy covariance methods over an urban/suburban landscape in the humid sub-tropical environment of Orlando, Florida, USA. Mean annual ET during the 3.5-year study period was 921 mm. On average, ET returned a large fraction of rainfall to the atmosphere (72 percent). But annual rainfall varied much more on a year-to-year basis (922 to 1,746 mm) than did urban ET (843 to 974 mm). Interestingly, 12-month periods of relatively high ET occurred during drier periods and
12-month periods of relatively low ET occurred during wetter periods. These results may be related to the generally drier atmosphere and less cloud cover that occur during lower rainfall periods. In addition, this largely urban environment is not subject to large soil moisture limitations because of the prevalence of lawn irrigation and lakes. Corroboration of the ET measurements was provided by independent water budgets for two watersheds that make up
much of the source area for the ET measurements. An urban analogue to the “crop coef€cient” concept was derived for the studied landscape. This metric was combined with an available satellite-based, State of Florida reference ET product (http://.water.usgs.gov/et/) to provide a method for transferring the results of this study to similar landscapes for other time periods and geographic areas. The results of this investigation in a humid, sub-tropical urban setting
are compared and contrasted with urban ET estimates for other environments
Original languageEnglish
Title of host publicationHeadwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds
EditorsC.E. Stringer, K.W. Krauss, J.S. Latimer
Place of PublicationAsheville, NC, USA
PublisherU.S. Department of Agriculture Forest Service, Southern Research Station
Pages246
Publication statusPublished - 2016
EventFifth Interagency Conference on Research in the Watersheds, March 2-5, 2015, North Charleston - North Charleston, South Carolina, United States
Duration: 2 Mar 20155 Mar 2015

Conference

ConferenceFifth Interagency Conference on Research in the Watersheds, March 2-5, 2015, North Charleston
CountryUnited States
CityNorth Charleston, South Carolina
Period2/03/155/03/15

Fingerprint

humid environment
evapotranspiration
rainfall
tropical environment
atmosphere
eddy covariance
cloud cover
water budget
soil moisture
irrigation
watershed
crop
lake
method

Cite this

Sumner, D. M., & Jacobs, C. M. J. (2016). Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA. In C. E. Stringer, K. W. Krauss, & J. S. Latimer (Eds.), Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds (pp. 246). Asheville, NC, USA: U.S. Department of Agriculture Forest Service, Southern Research Station.
Sumner, David M. ; Jacobs, C.M.J. / Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA. Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds. editor / C.E. Stringer ; K.W. Krauss ; J.S. Latimer. Asheville, NC, USA : U.S. Department of Agriculture Forest Service, Southern Research Station, 2016. pp. 246
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title = "Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA",
abstract = "An areally-integrated assessment of ET ux was obtained using eddy covariance methods over an urban/suburban landscape in the humid sub-tropical environment of Orlando, Florida, USA. Mean annual ET during the 3.5-year study period was 921 mm. On average, ET returned a large fraction of rainfall to the atmosphere (72 percent). But annual rainfall varied much more on a year-to-year basis (922 to 1,746 mm) than did urban ET (843 to 974 mm). Interestingly, 12-month periods of relatively high ET occurred during drier periods and12-month periods of relatively low ET occurred during wetter periods. These results may be related to the generally drier atmosphere and less cloud cover that occur during lower rainfall periods. In addition, this largely urban environment is not subject to large soil moisture limitations because of the prevalence of lawn irrigation and lakes. Corroboration of the ET measurements was provided by independent water budgets for two watersheds that make upmuch of the source area for the ET measurements. An urban analogue to the “crop coef€cient” concept was derived for the studied landscape. This metric was combined with an available satellite-based, State of Florida reference ET product (http://.water.usgs.gov/et/) to provide a method for transferring the results of this study to similar landscapes for other time periods and geographic areas. The results of this investigation in a humid, sub-tropical urban settingare compared and contrasted with urban ET estimates for other environments",
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Sumner, DM & Jacobs, CMJ 2016, Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA. in CE Stringer, KW Krauss & JS Latimer (eds), Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds. U.S. Department of Agriculture Forest Service, Southern Research Station, Asheville, NC, USA, pp. 246, Fifth Interagency Conference on Research in the Watersheds, March 2-5, 2015, North Charleston, North Charleston, South Carolina, United States, 2/03/15.

Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA. / Sumner, David M.; Jacobs, C.M.J.

Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds. ed. / C.E. Stringer; K.W. Krauss; J.S. Latimer. Asheville, NC, USA : U.S. Department of Agriculture Forest Service, Southern Research Station, 2016. p. 246.

Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

TY - CHAP

T1 - Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA

AU - Sumner, David M.

AU - Jacobs, C.M.J.

PY - 2016

Y1 - 2016

N2 - An areally-integrated assessment of ET ux was obtained using eddy covariance methods over an urban/suburban landscape in the humid sub-tropical environment of Orlando, Florida, USA. Mean annual ET during the 3.5-year study period was 921 mm. On average, ET returned a large fraction of rainfall to the atmosphere (72 percent). But annual rainfall varied much more on a year-to-year basis (922 to 1,746 mm) than did urban ET (843 to 974 mm). Interestingly, 12-month periods of relatively high ET occurred during drier periods and12-month periods of relatively low ET occurred during wetter periods. These results may be related to the generally drier atmosphere and less cloud cover that occur during lower rainfall periods. In addition, this largely urban environment is not subject to large soil moisture limitations because of the prevalence of lawn irrigation and lakes. Corroboration of the ET measurements was provided by independent water budgets for two watersheds that make upmuch of the source area for the ET measurements. An urban analogue to the “crop coef€cient” concept was derived for the studied landscape. This metric was combined with an available satellite-based, State of Florida reference ET product (http://.water.usgs.gov/et/) to provide a method for transferring the results of this study to similar landscapes for other time periods and geographic areas. The results of this investigation in a humid, sub-tropical urban settingare compared and contrasted with urban ET estimates for other environments

AB - An areally-integrated assessment of ET ux was obtained using eddy covariance methods over an urban/suburban landscape in the humid sub-tropical environment of Orlando, Florida, USA. Mean annual ET during the 3.5-year study period was 921 mm. On average, ET returned a large fraction of rainfall to the atmosphere (72 percent). But annual rainfall varied much more on a year-to-year basis (922 to 1,746 mm) than did urban ET (843 to 974 mm). Interestingly, 12-month periods of relatively high ET occurred during drier periods and12-month periods of relatively low ET occurred during wetter periods. These results may be related to the generally drier atmosphere and less cloud cover that occur during lower rainfall periods. In addition, this largely urban environment is not subject to large soil moisture limitations because of the prevalence of lawn irrigation and lakes. Corroboration of the ET measurements was provided by independent water budgets for two watersheds that make upmuch of the source area for the ET measurements. An urban analogue to the “crop coef€cient” concept was derived for the studied landscape. This metric was combined with an available satellite-based, State of Florida reference ET product (http://.water.usgs.gov/et/) to provide a method for transferring the results of this study to similar landscapes for other time periods and geographic areas. The results of this investigation in a humid, sub-tropical urban settingare compared and contrasted with urban ET estimates for other environments

M3 - Abstract

SP - 246

BT - Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds

A2 - Stringer, C.E.

A2 - Krauss, K.W.

A2 - Latimer, J.S.

PB - U.S. Department of Agriculture Forest Service, Southern Research Station

CY - Asheville, NC, USA

ER -

Sumner DM, Jacobs CMJ. Urban Evapotranspiration in a Humid Environment - Orlando, Florida, USA. In Stringer CE, Krauss KW, Latimer JS, editors, Headwaters to estuaries: advances in watershed science and management—Proceedings of the Fifth Interagency Conference on Research in the Watersheds. Asheville, NC, USA: U.S. Department of Agriculture Forest Service, Southern Research Station. 2016. p. 246