Paul Ruscher knows I am a sucker for all things relating to Atlanta and water so he sent me a link to his recent paper on the topic, "Large Scale Climate Oscillations and Mesoscale Surface Meteorological Variability in the Apalachicola-Chattahoochee-Flint River Basin", by Kelly A. Stevens and Paul H. Ruscher, DOI: 10.1016/j.jhydrol.2014.06.002 (Journal of Hydrology).
Here are the highlights from the article's homepage:
1) Analyzes climatological circumstances leading to low flows in the ACF basin.
2) Uses canonical correlation analysis to review relationships.
3) Uses temperature data and four, multi-temporal, computed SPI values.
4) Climate oscillations include AMO, NAO, PDO & SOI.
5) Establishes need for appropriate temporal SPI and subbasin study.
The “water wars” between Alabama, Georgia, and Florida over water restrictions and allocation in the Apalachicola-Chattahoochee-Flint River Basin (ACF) stem, in part, from the occurrence of several droughts in the 1980s, the dramatic increase in water use in the northern basin around Atlanta, and increased agricultural usage in the central basin. This study examines relationships between available surface climatological variables connected to evapotranspiration and climatic oscillations using canonical correlation analysis (CCA).
Canonical loadings and cross loadings from CCA are evaluated in two tests using temperature and precipitation data and four climate oscillations – the Atlantic Multidecadal Oscillation (AMO), North Atlantic Oscillation (NAO), Pacific Decadal Oscillation (PDO), and Southern Oscillation Index (SOI). In the first test, the six-month Standardized Precipitation Index (SPI) and all four seasons of the four climate oscillations from every subbasin in the ACF are evaluated, revealing relationships mostly with the AMO and NAO, and primarily with temperatures. In order to focus more on precipitation and the variance among the different temporal scales of the SPI, Test Two looks at the relationship between all four SPI variations and all four seasons of the climate oscillations from the extreme northern and southern subbasins. Test Two shows the twenty-four month SPI has the largest loadings and variance explained, which may be contributed to the longer frequencies in the AMO and PDO. The southern part of the basin is largely influenced by SOI, while the northern subbasin the AMO and PDO. Concurrent relationships between the same season of the climate oscillation and meteorological variable confirm previously researched directions of the relationships between the oscillation and precipitation or temperature in both Test One and Test Two.
Want more ACF basin? Try this: "Spatial Displacement & Temporal Deferral: Toward an Alternative Explanation of ACF Basin Water Conflict", by Johnny King Alaziz Wong and M. Martin Bosman.
ABSTRACT: The Apalachicola-Chattahoochee-Flint (ACF) River Basin conflict officially began in 1989 and despite ongoing declarations of readiness to seek a negotiated outcome to the conflict, there is still no end in sight. In fact, 2014 marks the 25th anniversary of this conflict. In this paper, we depart from conventional explanations of the crisis and propose an alternative theoretical point of entry to draw attention to the key structural forces driving water accumulation strategies in the basin. In doing so, we turn to David Harvey’s theoretical framework of capitalist growth and crisis to present an alternative understanding of the water conflict. By adopting this framework, we will reveal how the most dominant political and economic actor in the conflict, metro-Atlanta, has devised a series of spatial and temporal strategies to delay and displace a resolution while simultaneously using the impasse to entrench its economic and territorial interests to secure as much water as possible from the ACF water basin. The paper emphasises the crisis of capitalism in the form of suburbanisation in metro-Atlanta as the primary context in which the water conflict exists.
"One who takes long walks by the river will eventually fall in." - Unknown