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Evaluation of Surface Properties and Atmospheric Disturbances Caused by Post-dam Alterations of Land-use/Land-cover : Volume 11, Issue 5 (16/05/2014)

By Woldemichael, A. T.

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Book Id: WPLBN0004012103
Format Type: PDF Article :
File Size: Pages 39
Reproduction Date: 2015

Title: Evaluation of Surface Properties and Atmospheric Disturbances Caused by Post-dam Alterations of Land-use/Land-cover : Volume 11, Issue 5 (16/05/2014)  
Author: Woldemichael, A. T.
Volume: Vol. 11, Issue 5
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Pielke, R., Hossain, F., & Woldemichael, A. T. (2014). Evaluation of Surface Properties and Atmospheric Disturbances Caused by Post-dam Alterations of Land-use/Land-cover : Volume 11, Issue 5 (16/05/2014). Retrieved from http://hawaiilibrary.net/


Description
Description: Department of Civil and Environmental Engineering, Tennessee Technological University (Cookeville), Tennessee, USA. This study adopted a differential land-use/land-cover (LULC) analysis to evaluate dam-triggered land–atmosphere interactions for a number of LULC scenarios. Two specific questions were addressed: (1) can dam-triggered LULC heterogeneities modify surface and energy budget which, in turn, change regional convergence and precipitation patterns? and (2) how extensive is the modification in surface moisture and energy budget altered by dam-triggered LULC changes occurring in different climate and terrain features? The Regional Atmospheric Modeling System (RAMS, version 6.0) was set up for two climatologically and topographically contrasting regions: the American River Watershed (ARW) located in California and the Owyhee River Watershed (ORW) located in eastern Oregon. For the selected atmospheric river precipitation event of 29 December 1996 to 3 January 1997, simulations of three pre-defined LULC scenarios are performed. The definition of the scenarios are: (1) the control scenario representing the contemporary land-use, (2) the pre-dam scenario representing the natural landscape before the construction of the dams and (3) the non-irrigation scenario representing the condition where previously irrigated landscape in the control is transformed to the nearby land-use type. Results indicated that the ARW energy and moisture fluxes were more extensively affected by dam-induced changes in LULC than the ORW. Both regions, however, displayed commonalities in the modification of land–atmosphere processes due to LULC changes, with the control–non-irrigation scenario creating more change than the control–pre-dam scenarios. These commonalities were: (1) the combination of a decrease in temperature (up to 0.15 °C) and an increase in dewpoint (up to 0.25 °C) was observed, (2) there was a larger fraction of energy partitioned to latent heat flux (up to 10 W m−2) that increased the amount of water vapor to the atmosphere and resulted in a larger convective available potential energy (CAPE), (3) low level wind flow variation was found to be responsible for pressure gradients that affected localized circulations, moisture advection and convergence. At some locations, an increase in wind speed up to 1.6 m s−1 maximum was observed, (4) there were also areas of well developed vertical motions responsible for moisture transport from the surface to higher altitudes that enhanced precipitation patterns in the study regions.

Summary
Evaluation of surface properties and atmospheric disturbances caused by post-dam alterations of land-use/land-cover

Excerpt
Woldemichael, A. T., Hossain, F., Pielke Sr., R. A., and Beltrán A.: Understanding the impact of dam-triggered land use/land cover change on the modification of extreme precipitation, Water Resour. Res., 48, W09547, doi:10.1029/2011WR011684, 2012.; Woldemichael, A. T., Hossain, F., and Pielke Sr., R. A.: Impacts of post-dam land-use/land-cover changes on modification of extreme precipitation in contrasting hydro-climate and terrain features, J. Hydrometeorol., 15, 777–800, doi:10.1175/JHM-D-13-085.1, 2013.; Betts, A. K., Ball, J. H., Beljaars, A. C. M., Miller, M. J., and Viterbo, P. A.: The land surface–atmosphere interaction: a review based on observational and global modeling perspectives, J. Geophys. Res., 101, 7209–7225, 1996.; Boucher, O., Myhre, G., and Myhre, A.: Direct human influence of irrigation on atmospheric water vapor and climate, Clim. Dynam., 22, 597–603, doi:10.1007/s00382-004-0402-4, 2004.; Castro, C. L.: Investigation of the summer climate of North America: a regional atmospheric modeling study, Ph.D. dissertation, Colo. State Univ., Fort Collins, 2005.; Zhao, M. and Pitman, A. J.: The impact of land cover change and increasing carbon dioxide on the extreme and frequency of maximum temperature and convective precipitation, Geophys. Res. Lett., 29, 1078, doi:10.1029/2001GL013476, 2002.; Climate Change Science Program: Strategic plan for the US climate change science program: Washington, D. C., 202 pp., available at: http://purl.access.gpo.gov/GPO/LPS64573, 2003.; DeAngelis, A., Dominguez, F., Fan, Y., Robock, A., Kustu, M. D., and Robinson, D.: Evidence of enhanced precipitation due to irrigation over the Great Plains of the United States, J. Geophys. Res., 115, D15115, doi:10.1029/2010JD013892, 2010.; Degu, A. M. and Hossain, F.: Investigating the mesoscale impact of artificial reservoirs on frequency of rain during growing season, Water Resour. Res., 48, W05510, doi:10.1029/2011WR010966, 2012.; Dettinger, M. D., Ralph, F. M., Hughes, M., Neiman, T. D. P., Cox, D., Estes, G., Reynolds, D., Hartman, R., Cayan, D., and Jones, L.: Design of quantification of an extreme winter storm scenarios for emergency preparedness and planning exercise in California, Nat. Hazards, 60, 1085–1111, doi:10.1007/s11069-011-9894-5, 2012.; Douglas, E. M., Niyogi, D., Frolking, S., Yeluripati, J. B., Pielke Sr., R. A., Niyogi, N., Vörösmarty, C. J., and Mohanty, U. C.: Changes in moisture and energy fluxes due to agricultural land use and irrigation in the Indian Monsoon Belt, Geophys. Res. Lett., 33, L14403, doi:10.1029/2006GL026550, 2006.; Douglas, E. M., Beltran, A., Niyogi, D., Pielke Sr., R. A., and Vorosmarty, C. J.: The impact of agricultural intensification and irrigation on land atmosphere interactions and Indian monsoon precipitation – a mesoscale modeling perspective, Global Planet. Change, GLOBAL-01425, 1–12, doi:10.1016/j.gloplacha.2008.12.007, 2009.; Eungul, L., Sacks, W. J., Chase, T. N., and Foley, J. A.: Simulated impacts of irrigation on the atmospheric circulation over Asia, J. Geophys. Res., 116, D08114, doi:10.1029/2010JD014740, 2011.; Fall, S., Deffenbaugh, N. S., Niyogi, D., Pielke Sr., R. A., and Rochon, G.: Temperature and equivalent temperature over the United States (1979–2005), Int. J. Climatol., 3

 

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