Amerika Birleşik Devletleri’ndeki Minimum Akım Trendleri

Yıl 2017, , 71 - 89, 31.01.2017

Gökçe Ceylan , Upmanu Lall

https://doi.org/10.31807/tjwsm.297225

Cited By: 2

Öz

Low Streamflow Trends in the United States

Öz

This research considered low streamflow features which are an important indicator of droughts and suggests significant information for water-resources decision making. Consecutive low flow conditions in a river can create chronic water scarcity. Water scarcity is one of the main drivers of a social and economic conflicts. This research has observed not only locations where suitable adaptive management measures are needed but also locations where low flow regime changes due to natural / climate effects or anthropogenic impacts. Trends in low flows in the United States were evaluated using Mann-Kendall and the Sen-Slope trend tests. 5% significance level is used and an evidence of mostly upward trends in low flows in the United States was found. Trends in referenced (not exposed to anthropogenic impacts) and non-referenced stations (exposed to anthropogenic impacts) were also investigated separately, and then compared. Results illustrate that the percentage of significant low flow trends in non-referenced stations are higher than referenced stations. Furthermore, wavelet, PCA and clustering analysis were also performed. Wavelet analysis was used to determine the amplitude and timing of such low streamflow discontinuities for specific wavebands. Clustering analysis helped to determine a grouping low streamflow patterns with similar annual flow behaviors.

Anahtar Kelimeler

low streamflow, trend analysis, streamflow

Kaynakça

• A tutorial on Principal Components Analysis Lindsay I Smith February 26, 2002.
• Anctil, F., and Paulin, C. (2003). Wavelet Analysis of the Interannual Variability in Southern Que´bec Streamflow. 2004 American Meteorological Society.
• Burn, D.H., and Hag Elnur, M.A. (2002). "Detection of hydrologic trends and variability." Journal of Hydrology 255(1–4): 107-122.
• Clausen, B., I.G. Jowett, B.J.F. Biggs, and B. Moeslund, (2004). Stream Ecology and Flow Management. In: Developments in Water Science 48, L.M. Tallaksen and H.A.J. Van Lanen (Editors). Elsevier, Amsterdam.
• Curran, C.A., Eng K., and Konrad, C.P. (2012). Analysis of low flows and selected methods for estimating low-flow characteristics at partial-record and ungaged stream sites in western Washington: U.S. Geological Survey Scientific Investigations Report 2012-5078.
• Helsel D.R, and Hirsch, R.M, Statistical Methods in Water Resources. Techniques of Water-Resources Investigations of the United States Geological Survey.
• Dai, A. (2013). "Increasing drought under global warming in observations and models." Nature Clim. Change 3(1): 52-58.
• Douglas, E. M., et al. (2000). "Trends in floods and low flows in the United States: impact of spatial correlation." Journal of Hydrology 240(1–2): 90-105.
• EPA Water Data & Tools. Retrieved from http://water.epa.gov/scitech/datait/models/dflow/flow101.cfm
• Flynn, R.H., (2003). Development of regression equations to estimate flow durations and low-flow frequency statistics in New Hampshire streams: U.S. Geological Survey Water- Resources Investigations Report 02.
• Imperial College London, DOC493: Intelligent Data Analysis and Probabilistic Inference Lecture 15.
• IPCC (2001) Third Assessment Report. Working Group II: Impacts, Adaptation and Vulnerability; Chapter 4: Hydrology and Water Resources. Retrieved from https://www.ipcc.ch/ipccreports/tar/wg2/pdf/wg2TARchap4.pdf
• James A. Falcone, United States Geological Survey, GAGES II (Geospatial Attributes of Gages for Evaluating Streamflow), summary report, September 2011.
• Kahya E., Demirel M.C., and Piechota T.C. (2007). Spatial grouping of annual streamflow patterns in Turkey. Hydrology Days 2007.
• Kahya, E. and Kalaycı, S. (2004). "Trend analysis of streamflow in Turkey." Journal of Hydrology 289(1–4): 128-144.
• Kendall, M.G. (1975). Rank correlation methods. Charles Griffin. London. McCabe GJ, Wolock DM (2002) Trends and temperature sensitivity of moisture conditions in the conterminous United States. Climate Research 20.54
• Lins, H.F. (1985). "Interannual streamflow variability in the United States based on principal components." Water Resources Research 21(5): 691-701.
• Lins, H.F. and Slack, J.R. (1999). "Streamflow trends in the United States." Geophysical Research Letters 26(2): 227-230.
• Lorenzo-Seva, U. (2013). How to report the percentage of explained common variance in exploratory factor analysis. Technical Report. Department of Psychology, Universitat Rovira i Virgili, Tarragona.
• NOAA Climate Prediction Center, Climate Teleconnections. Retrieved from http://www.cpc.ncep.noaa.gov/data/teledoc/teleintro.shtml
• Pal, I., Anderson B.T., Salvucci G.D., Gianotti D.J. (2013). Shifting seasonality and increasing frequency of precipitation in wet and dry seasons across the US. Geophysical Research Letters 40:4030-4035.
• Pal, I., Towler E., and Livneh B., (2015). How Can We Better Understand Low River Flows as Climate Changes?, Earth & Space Science News. Retrieved from https://eos.org/opinions/how-can-we-better-understand-low-river-flows-as-climate-changes
• Small, D., et al. (2006). "Trends in precipitation and streamflow in the eastern U.S.: Paradox or perception?" Geophysical Research Letters 33(3): n/a-n/a.53.
• Smakhtin, V.U. (2001). "Low flow hydrology: a review." Journal of Hydrology 240(3–4): 147-186.
• Sawaske, S.R. and Freyberg, D.L. (2014). "An analysis of trends in baseflow recession and low-flows in rain-dominated coastal streams of the pacific coast." Journal of Hydrology 519, Part A: 599-610.
• Smith, C.L., Turcotte, L.D., and Isacks, L.B. (1998). Stream flow characterization and feature detection using a discrete wavelet transform. Hydrological Processes, Vol. 12, 233±249 (1998)
• Tallaksen, L.M., and Van Lanen, H.A. (2004). Hydrological drought: processes and estimation methods for streamflow and groundwater. Elsevier 48.
• Trenberth, K. E., et al. (2014). "Global warming and changes in drought." Nature Clim. Change 4(1): 17-22.
• U.S. EPA (2012) Background information on the definition and characteristics of low flows. Flow 101. DFLOW. Retrieved from http://water.epa.gov/scitech/datait/models/dflow/flow101.cfm
• USGS GAGES-II: Geospatial Attributes of Gages for Evaluating Streamflow. Retrieved from http://water.usgs.gov/GIS/metadata/usgswrd/XML/gagesII_Sept2011.xml
• USGS Water Data FAQ. Retrieved from http://help.waterdata.usgs.gov/faq/sites/do-stationnumbers-have-any-particular-meaning.
• Westra, S., Brown, C., Lall, U., and Sharma A. (2007). Modeling multivariable hydrological series: Principal component analysis or independent component analysis?. Water Resources. Res., 43, W06429, doi:10.1029/2006WR005617.
• McCabe GJ, Wolock DM (2002) Trends and temperature sensitivity of moisture conditions in the conterminous United States. Climate Research 20.54