Droughts in Georgia

Barber, Nancy L.; Stamey, Timothy C.

doi:10.3133/ofr2000380

Cited by 13 publications

(12 citation statements)

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“…We can see periods of decadal and longer rainfall decline ending around 1935, 1955, 1990, and 2005 (to locate these years find prominent negative areas on the 45‐degree line). These dates of declining rainfall trends align with identified drought in the study area (Barber and Stamey, ). The magnitude of the long‐term mean trend (1895–2012) was 0.28 mm per year (Table ); however, this long‐term positive trend was partially due to peak rainfall in the 1970s (Figure ).…”

Section: Resultssupporting

confidence: 82%

Historical trends in precipitation, temperature and drought in the Alabama–Coosa–Tallapoosa and Apalachicola–Chattahoochee–Flint river basins

Maleski

Martinez

2016

Intl Journal of Climatology

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Using station data from the United States Historical Climatology Network, we preformed a running trend analysis of temperature, precipitation and drought in the Alabama–Coosa–Tallapoosa and Apalachicola–Chattahoochee–Flint river basins for the time period 1895–2012 on annual and monthly timescales. Our study found that long‐term precipitation and temperature trends were statistically detectible but relatively slight in the order of an increase at 3 mm per decade for precipitation and a decline of 0.02 °C per decade for temperature. Running trend analyses for the time period 1895–2012 found field‐significant and relatively large annual precipitation increases and temperature decreases between the 1950s and early 1980s associated with the 'warming hole'. The magnitude of precipitation trends for the aforementioned period was in the range of 7 mm per year for precipitation and 0.6 °C per decade for temperature. For temperature, we observed generally decreasing maximum, minimum and mean temperatures in the 1960s and 1970s and increasing temperatures from the 1970s to present. Minimum temperatures particularly showed a strong increase in recent summer months in the range of 0.3 °C per decade. Trends in the diurnal temperature range showed a recent narrowing during summer and fall months. Differences in the standardized precipitation index (SPI) and standardized precipitation evapotranspiration index (SPEI) did not show a strong effect of temperature on drought for this region.

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Section: Resultssupporting

confidence: 82%

Historical trends in precipitation, temperature and drought in the Alabama–Coosa–Tallapoosa and Apalachicola–Chattahoochee–Flint river basins

Maleski

Martinez

2016

Intl Journal of Climatology

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“…The two decades (1958-1979 following dam construction had higher average annual flows than the equivalent period preceding it (Leitman et al, 1983;Elder et al, 1988). Drought conditions arrived again in the 1980s and have become particularly acute over the last several years (Barber and Stamey, 2000;Verdi et al, 2006). The source of water level declines in the Apalachicola is a synergism of ongoing upstream withdrawals, historic river engineering and drought.…”

Section: Introductionmentioning

confidence: 99%

“…Because of population growth and agriculture in Georgia, water is diverted from the Apalachicola via withdrawals along the Chattahoochee and the Flint Rivers. In conjunction with drier climate (Barber and Stamey, 2000;Groisman and Knight, 2008;Knapp et al, 2008), these human demands have lowered flows into the Apalachicola and fomented debate among Florida, Alabama and Georgia over water allocation in the ACF basin (Feldman, 2008).…”

Section: Introductionmentioning

confidence: 99%

Biogeomorphic characterization of floodplain forest change in response to reduced flows along the Apalachicola River, Florida

Stallins

Nesius

Smith

et al. 2009

River Research & Apps

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The Apalachicola-Chattahoochee-Flint (ACF) River basin is an important ecological and economic component of a three-state region (Florida, Alabama and Georgia) in the southeastern U.S. Along the Apalachicola River in northwest Florida, the duration of floodplain inundation has decreased as a result of declining river levels. Spring and summer flows have diminished in volume because of water use, storage and evaporation in reservoirs, and other anthropogenic and climatic changes in the basin upstream. Channel erosion from dam construction and navigation improvements also caused river levels to decline in an earlier period. In this paper, we document trends in floodplain forest tree species composition for the interval spanning these influences. Historic tree inventories from the 1970s were compared to present-day forests through non-metric multidimensional scaling, indicator species analysis (ISA) and outlier detection. Forests are compositionally drier today than in the 1970s. Overstory to understory compositional differences within habitats (levees, high/low bottomland forest and backswamps) are as large as the species contrasts between habitats. Present-day forests are also compositionally noisier with fewer indicator species. The largest individual declines in species density and dominance were in backswamps, particularly for Fraxinus caroliniana Nyssa ogeche and Nyssa aquatica. We discuss how contrasts in the compositional change signal for levee and backswamp landform habitats reflect a complex biogeomorphic response to fluctuating river flows for alluvial rivers in humid climates.

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“…In addition, 40 or more of the 197 streamgages have significant negative trends in the monthly minimum 1-day and 7-day average flows for the months of April through November. Multiple droughts have occurred in Georgia since 1998 (Barber and Stamey, 2000;Knaak and others, 2009Knaak and others, , 2010Knaak and others, , 2013Knaak and Peck, 2014). Most of the streamgages with significant negative trends have a period of record that ends during one of the recent droughts, particularly those streamgages with record through the 2013 climatic year.…”

Section: Statistical Analysis Of Trends In Annual and Monthly Minimummentioning

confidence: 99%

Droughts in Georgia

Cited by 13 publications

References 0 publications

Historical trends in precipitation, temperature and drought in the Alabama–Coosa–Tallapoosa and Apalachicola–Chattahoochee–Flint river basins

Historical trends in precipitation, temperature and drought in the Alabama–Coosa–Tallapoosa and Apalachicola–Chattahoochee–Flint river basins

Biogeomorphic characterization of floodplain forest change in response to reduced flows along the Apalachicola River, Florida

Selected low-flow frequency statistics for continuous-record streamgages in Georgia, 2013

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