A very detailed water budget analysis was conducted on Lake Trafford in South Florida. The inflow was dominated by surface water influx via five canals (61%), with groundwater influx constituting 12% and direct rainfall constituting 27%. Lake discharge was dominated by sheet flow (69%) and evapotranspiration (30.5%), with groundwater recharge of the hydraulically connected unconfined aquifer accounting for only 0.5%. The removal of 30 M tons (4.4 × 106 m3) of organic sediment impacted the groundwater influx, causing enhanced groundwater flow into the deeper parts of the lake and mixed flow along the banks, creating a rather unusual pattern. The large number of groundwater seepage meters used during this investigation led to a very reliable set of measurements with occasional failure of only a few meters. A distinctive relationship was found between the wet-season lake stage, heavy rainfall events, and pulses of exiting sheet flow from the lake. Estimation of the evapotranspiration loss using data collected from a weather station on the lake allowed the use of three different models, which, when averaged, produced results comparable to Lake Okeechobee (South Florida). A limitation of this investigation was the inability to directly measure sheet-flow discharges, which had to be estimated as a residual within the calculated water budget.

中文翻译：

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南佛罗里达州天然亚热带湖泊特拉福德湖的水预算：有机沉积物疏浚后亚热带湖泊地下水流入增加的一个例子

对南佛罗里达州特拉福德湖进行了非常详细的水预算分析。流入量以通过5条运河的地表水流入为主（61%），地下水流入占12%，直接降雨占27%。湖泊流量以面流（69%）和蒸散量（30.5%）为主，水力连通的无承压含水层地下水补给仅占0.5%。 3000万吨（4.4×106立方米）有机沉积物的清除影响了地下水流入，导致地下水流入湖泊较深部分和沿岸混合流动，形成了一种相当不寻常的模式。本次调查中使用了大量地下水渗流计，得到了一组非常可靠的测量结果，偶尔出现的故障只有几米。研究人员发现，湿季湖泊水位、强降雨事件和从湖泊流出的面流脉冲之间存在独特的关系。使用从湖上气象站收集的数据来估计蒸散损失，可以使用三种不同的模型，这些模型的平均结果与奥基乔比湖（南佛罗里达州）相当。这项调查的局限性是无法直接测量表流排放，必须将其估计为计算出的水预算中的残留量。