Skip to Main Content
Regional annual water yield from forest lands and its response to potential deforestation across the southeastern United StatesAuthor(s): Ge Sun; Steve G. McNulty; J. Lu; Devendra M. Amatya; Y. Liang; R.K. Kolka
Source: Journal of Hydrology 308 (2005) 258-268
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (802 KB)
DescriptionRegional water yield at a meso-scale can be estimated as the difference between precipitation input and evapotranspiration output. Forest water yield from the southeastern US varies greatly both in space and time. Because of the hot climate and high evapotranspiration, less than half of the annual precipitation that falls on forest lands is available for stream flow in this waterrich region. Water yield is highest in the mountainous regions that receive the highest precipitation and have the lowest air temperature, and the lowest in the coastal regions that are dominated by wetlands receiving moderate rainfall but high evapotranspiration. Water resource management for both floods and droughts demands an accurate estimation of water yield from forests. Projected climate and land use changes further increase the variability of water yield in the region. The objectives of this study were to (1) develop a simple annual water yield odeling procedure by testing and calibrating a generalized global evapotranspiration model, (2) to apply the validated model to estimate regional forest water yield and to predict potential water yield response to forest removal. Hydrologic databases at a watershed-scale and a regional-scale were developed for model development, calibration, and validation. We applied the water yield model to the southern region by integrating land cover and high resolution climate databases by using a Geographic Information System (GIs). The model developed in this paper can be used to examine the spatial and temporal variability for water yield and predict the effects of climate and land cover changes at the regional scale.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationSun, Ge; McNulty, Steve G.; Lu, J.; Amatya, Devendra M.; Liang, Y.; Kolka, R.K. 2005. Regional annual water yield from forest lands and its response to potential deforestation across the southeastern United States. Journal of Hydrology 308 (2005) 258-268
KeywordsEvapotranspiration, Forest hydrology, Hydrologic modeling, Water yield, Deforestation, Climate change
- Modeling Actual Evapotranspiration From Forested Watersheds Across the Southeastern United States
- Regional effects of vegetation restoration on water yield across the Loess Plateau, China
- Water yield responses to climate change and variability across the North–South Transect of Eastern China (NSTEC)
XML: View XML