Evapotranspiration of Hawaiʻi
Funding
The 2014 Evapotranspiration of Hawai‘i project was conducted under an agreement between the State of Hawai‘i Commission on Water Resource Management and the U.S. Army Corps of Engineers, Honolulu District under Section 22 of the Water Resources Development Act of 1974. Agreement No. W9128A-08-D-00007 was awarded to CH2M Hill, which subcontracted the Evapotranspiration of Hawai‘i portion of the project to the University of Hawai‘i at Mānoa, Department of Geography. Ryan Longman's participation was supported by the Pacific Islands Climate Science Center and by Pacific Islands Climate Change Cooperative award F10A00079. The development of the evapotranspiration, solar, and climate websites, including their interactive map tools, was supported by National Science Foundation Hawai‘i EPSCoR grant no. EPS-0903833.
Publications
Giambelluca, T.W., X. Shuai, M.L. Barnes, R.J. Alliss, R.J. Longman, T. Miura, Q. Chen, A.G. Frazier, R.G. Mudd, L. Cuo, and A.D. Businger. 2014. Evapotranspiration of Hawai‘i. Final report submitted to the U.S. Army Corps of Engineers—Honolulu District, and the Commission on Water Resource Management, State of Hawai‘i (pdf)
The Evapotranspiration of Hawai‘i website provides a set of maps of the spatial patterns of evapotranspiration for the major Hawaiian Islands. To estimate evapotranspiration, numerous other variables, such as solar radiation, air temperature, and relative humidity to name a few, had to be estimated. Those are also included on the website. Most variables are mapped for each hour of the average 24-hour cycle of each month and for each hour of the average 24-hour cycle for the whole year. The average value for each month and the annual average are also mapped. In developing the evapotranspiration estimates, more than 12,000 maps were created. Many of those maps are available via this website, in the form of downloadable files and, for a selection of variables, on the interactive mapping tool.
