Mean groundwater withdrawals from the Floridan aquifer system by county, 1995–2010

Values represent mean groundwater withdrawals from the Floridan aquifer system for the period 1995–2010 in the southeastern United States. Mean withdrawals were computed by multiplying the gross groundwater withdrawals for each county by a coefficient representing the proportion of total groundwater withdrawals coming from each aquifer. Coefficients for each county and water-use category were back-calculated from data published in Marella and Berndt, 2005, Water withdrawals and trends from the Floridan aquifer system in the southeastern United States, 1950–2000: U.S. Geological Survey Circular 1278, 20 p. and also from unpublished data from the U.S. Geological Survey South Atlantic Water Science Center (Georgia District).

本数据集的数值代表1995年至2010年美国东南部佛罗里达含水层系统（Floridan aquifer system）的平均地下水取水量。其计算方式为：将各县级行政区的总地下水取水量乘以一个系数，该系数代表来自对应含水层的地下水取水量占总地下水取水量的比例。各县级行政区及用水类别的系数，均由Marella与Berndt于2005年发表的《1950–2000年美国东南部佛罗里达含水层系统的地下水取水量与变化趋势：美国地质调查局（U.S. Geological Survey）通报1278号》（共20页）中的公开数据，以及美国地质调查局南大西洋水科学中心（佐治亚分部）提供的未发表数据反推得到。