佛罗里达州中部的绿色沼泽地面积超过50万英亩，非常重要 该地区的水资源、野生动物、地表水、洪水滞留和水资源 质量它被佛罗里达州指定为该州最关注的地区。拼图 河流、沼泽、高地和森林，绿色沼泽包含四个主要河流的源头 河流系统。仔细的供水规划，包括含水层性能测试， 地下水流动建模和评估对于确保拟建开发项目 不影响绿色沼泽的功能。 莱克兰市于1993年获得了一份用水许可证，授权撤回 从西北部的水田和Floridan的水田。 东北 目前未投入运营的wellfield位于绿色沼泽区内，且 井场内外被湿地环绕。所需用水许可证的条件 该市进行长期含水层性能测试（APT），测试持续时间足以 确定地表含水层和Floridan含水层之间的联系（如有），并预测 每天900万加仑（MGD）的拟议提取对湿地的潜在影响 年日需求量和16 MGD最大日需求量。 自1989年首次运行72小时APT以来，又进行了两次额外的测试，包括一次为期7天的测试 2000年进行测试，2003年进行12天测试。三次恒速放电试验在以下条件下进行: 不同的水文条件。1989年，表层含水层饱和，部分 在APT之前和期间，现场被淹没。2000年，表层含水层基本干燥， 在APT期间，弗洛里丹含水层中的电位头在该地区发生了很大变化 对农业泵送防冻的响应。2003年发生了一场大雨 在APT启动前进行测试，然后在12天的泵送期间没有降雨 测试的一部分。这导致表层含水层的水位下降 APT泵送带来的分钟压降效应不堪重负。 分析所有三项测试的时间/下降数据的结果表明，无论 测试时间从3天到12天，或之前和当前的降雨事件 透过率、存储和泄漏基本相同。 经确定: 防止表层含水层水位波动的控制因素是极低的水位 地表含水层和Floridan含水层之间的渗漏值，由超过20英尺的低水位引起 渗透性粘土。本文介绍了长达14年的测试和分析 产生了非常相似的解决方案。这表明，只要水源含水层是饱和的 有限的，且下伏和上覆含水层饱和或接近饱和，有效的 水力参数分析是可能的。 包括14个参考文献、表格和图表。

The Green Swamp of central Florida covers an area greater than 500,000 acres and is important to the region in terms of water resources, wildlife, surface water, flood water detention, and water quality. It is designated by the State of Florida as an Area of Critical State Concern. A mosaic of rivers, swamps, uplands and forests, the Green Swamp contains the headwaters of four major river systems. Careful water supply planning, which includes aquifer performance testing, groundwater flow modeling, and evaluation, is essential to ensure that proposed development will not interfere with the function of the Green Swamp. The City of Lakeland was issued a water use permit in 1993 that authorized the withdrawal of water from the Floridan aquifer at the City's northwest and northeast wellfields. The northeast wellfield, which is currently not in operation, is located within the Green Swamp area and is surrounded by wetlands on and off the wellfield site. Conditions of the water use permit required that the City conduct a long-term aquifer performance test (APT), sufficient in duration to determine the connection between the surficial and Floridan aquifers if any, and to predict the potential impact to wetlands from the proposed withdrawals of 9 million gallons per day (MGD) annual daily demand and 16 MGD maximum daily demand. Since the initial 72-hour APT was run in 1989, two additional tests were run including a 7-day test in 2000 and a 12-day test in 2003. The three constant rate discharge tests were run under different hydrologic conditions. The surficial aquifer in 1989 was saturated and portions of the site were inundated before and during the APT. In 2000, the surficial aquifer was essentially dry, and during the APT potentiometric head in the Floridan aquifer varied widely in the region in response to agricultural pumping for freeze protection. A large rain event occurred in the 2003 test just before initiation of the APT, and then no rain occurred during the 12-day pumping portion of the test. This led to a recession of water levels in the surficial aquifer that overwhelmed minute drawdown effects from APT pumping. The results of analyzing the time/drawdown data from all three tests showed that no matter the length of the test from 3 days to 12 days or the antecedent and current rainfall events, the values of transmissivity, storage and leakage are essentially the same. It was determined that the controlling factor preventing the fluctuation of surficial aquifer water levels was the extremely low leakage value between the surficial and Floridan aquifers resulting from over 20 feet of low permeability clay. This paper presents the testing and analyses that have spanned 14 years resulting in very similar solutions. It shows that as long as the source aquifer is saturated and confined, and the underlying and overlying aquifers are saturated or nearly so, valid results of hydraulic parameter analyses are possible. Includes 14 references, table, figures.