Evapotranspiration (ET) at Immokalee row crop site, daily data, Collier County, Florida, September 23, 2008 - January 7, 2009

The data set consists of daily sums of 30-minute evapotranspiration measurements made at the USGS Immokalee row crop climate station beginning September 23, 2008 and ending January 7, 2009. Daily ET rates corrected to a near-surface energy-budget varied from 0.1 mm (9/28/2008) to 3.3 mm (9/24/2008). The eddy-covariance method was used, with high-frequency sensors installed above an experimental field planted in green peppers to measure sensible and latent heat fluxes. Data were collected at 30-minute resolution, with evapotranspiration corrected to the near-surface energy-budget at that timescale. The study was conducted at an experimental field on the University of Florida Southwest Florida Research and Education Center (SWFREC) in Immokalee, Florida (Latitude 26 27 40 North Longitude 81 26 24 West in degrees minutes seconds, North American Datum 83, Section 20, Township 46S, Range 29E), in collaboration with Dr. Sanjay Shukla and university staff and students, who maintain six drainage lysimeters within the field (Jaber and others, 2006; Shukla and others, 2006; Shukla and others, 2012; Shukla and Shrestha, 2015, Shrestha and Shukla, 2014). Peppers were planted in plastic-mulched raised beds, with drip irrigation beneath the mulch used to maintain soil moisture at field capacity. Areas between the beds were bare soil or sparsely covered. Dimensions of the field were about 117 meters (north-south) by 72 meters (east-west), or 0.83 hectare. During pepper seasons, the ET station was located in the center of the field between two sets of drainage lysimeters. References: Jaber, F. H., Shukla, S., and Srivastava, S., 2006, Recharge, upflux, and water table response for shallow water table conditions: Hydrological Processes, v. 20, p. 1895-1907. Shukla, S., and Shrestha, N., 2015, Evapotranspiration for plastic-mulched production system for gradually cooling and warming seasons: measurements and modeling: Irrigation Science v. 33, no. 5, p. 387-397. Shukla, S., Jaber, F.H., Goswami, D., and Srivastava, S., 2012, Evapotranspiration losses for pepper under plastic mulch and shallow water table conditions: Irrigation Science, DOI 10.1007/s00271-012-0327-3. Shukla, S., Srivastava, S., and Hardin, J.D., 2006, Design, construction, and installation of large drainage lysimeters for water quantity and quality studies: Applied Engineering in Agriculture v. 22, no. 4, p. 529-540. Shrestha, N. K. and Shukla, S., 2014, Evaporation and transpiration losses from erect and vine crops grown under plastic mulch in a sub-tropical region: Agricultural Water Management v. 143, no. 9, p. 29-37, DOI 10.1016. /j.agwat.2014.05.011

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