Evapotranspiration from Marsh and Open-Water Sites at Upper Klamath Lake, Oregon, 2008-2010: Usgs Scientific Investigations Report 2013-5014 9781288886722

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Автор: Stannard David I., Gannett Marshall W.
Название: Evapotranspiration from Marsh and Open-Water Sites at Upper Klamath Lake, Oregon, 2008-2010: Usgs Scientific Investigations Report 2013-5014
ISBN: 9781288886722
Издательство: Bibliogov
Классификация: ISBN-10: 1288886721
Обложка/Формат: Paperback
Страницы: 82
Вес: 0.16 кг.
Дата издания: 01.03.2013
Язык: English
Размер: 246 x 189 x 4
Поставляется из: США
Описание: Water allocation in the Upper Klamath Basin has become difficult in recent years due to the increase in occurrence of drought coupled with continued high water demand. Upper Klamath Lake is a central component of water distribution, supplying water downstream to the Klamath River, supplying water for irrigation diversions, and providing habitat for various species within the lake and surrounding wetlands. Evapotranspiration (ET) is a major component of the hydrologic budget of the lake and wetlands, and yet estimates of ET have been elusive-quantified only as part of a lumped term including other substantial water-budget components. To improve understanding of ET losses from the lake and wetlands, measurements of ET were made from May 2008 through September 2010. The eddy-covariance method was used to monitor ET at two wetland sites continuously during this study period and the Bowen-ratio energy-balance method was used to monitor open-water lake evaporation at two sites during the warmer months of the 3 study years. Vegetation at one wetland site (the bulrush site) consists of a virtual monoculture of hardstem bulrush (formerly Scirpus acutus, now Schoenoplectus acutus), and at the other site (the mixed site) consists of a mix of about 70 percent bulrush, 15 percent cattail (Typha latifolia), and 15 percent wocus (Nuphar polysepalum). Measured ET at these two sites was very similar (means were 2.5 percent) and mean wetland ET is computed as a 70 to 30 percent weighted average of the bulrush and mixed sites, respectively, based on community-type distribution estimated from satellite imagery.

Evapotranspiration from Marsh and Open-Water Sites at Upper Klamath Lake, Oregon, 2008-2010: Usgs Scientific Investigations Report 2013-5014, Stannard David I., Gannett Marshall W.