Field measurements, major ions, nutrient, and carbon data for sites in the interior of the Everglades National Park

The data catagories include site name, date, time, station ID, medium, record #, agency analyzing sample, agency collecting sample, discharge (daily mean and instantaneous), gage height, lab spec condition, field spec condition, total dissolved solids, air and water temp, pH (lab and field), and amounts of oxygen, nitrogen and nitrogen compounds, phosphorus, carbonates, magnesium, sodium, potassium, chloride, sulfate, calcium, floride, silica, and carbon.

Big Cypress National Preserve (BICY) and Everglades National Park (EVER) maintain separate networks of hydrologic monitoring stations (hydrostations) for measuring the stage and quality of surface water throughout their units. The data collected at these sites provides a historical baseline for assessing hydrologic conditions and making a wide range of management decisions (both internally and externally). Surface-water stage data is relatively straight-forward to analyze, both in real time and relative to historic conditions, and has typically been conducted by in-house hydrology staff at both units. Analysis of surface water-quality data is generally regarded as being more complex because of the subtleness of trends, absence of continuous data (bi-monthly for BICY and monthly for EVER), and dependence on surface water depth and season. Collection and analysis of water-quality samples at BICY and EVER are done under cooperative agreements with the South Florida Water Management District (SFWMD). Under these agreements, the Park Service collects the samples in the field and the SFWMD provides sampling equipment and laboratory analyses. EVER has been sampling water quality on a monthly basis at 9 "internal marsh" stations since 1984 as part of this program. BICY has been sampling water quality on a monthly basis at 10 "internal" stations since 1995 as part of this agreement, with water quality data at these sites extending as far back to 1988 (but not as part of the agreement). Water-quality data collected at the BICY and EVER stations has been archived and reported for short-time intervals (yearly and bi-yearly), but an analysis that covers all sampled parameters, extends over the full period of record, and provides comparisons between the two units has yet to be performed. In 2000, a study was begun by the U.S. Geological Survey to gather, edit, and interpret selected water-quality data from a variety of sources to improve the understanding of changes in water-quality in areas impacted by human activities or in more remote and relatively unimpacted areas of the Everglades and Big Cypress Swamp. One purpose is to look for long-term trends and possibly relate the trends to human or natural influences on water quality such as agriculture, drought, hurricanes, changes in water management, etc. Another purpose is to interpret data from the most remote and unimpacted areas to discern, if possible, what the natural background concentrations are for water-quality constituents that have sufficient data. An attempt will be made to find correlations between available water-quality, physical, and meteorological parameters. Such analyses of water-quality and ancillary data may assist in establishing water-quality standards appropriate for the designation as Outstanding Florida Waters in both the Everglades National Park and the Big Cypress National Preserve. Ancillary data such as precipitation, water-level, water flow, dates of major storms, and beginning and ending dates of water-control effects will be studied to relate their timing to any noticeable changes in water quality.

数据类别包括：站点名称、日期、时间、测站编号、介质、记录编号、样品分析机构、样品采集机构、流量（日均值与瞬时值）、水位、实验室样品条件、野外样品条件、总溶解固体、气温与水温、pH值（实验室与野外测定）、氧、氮及氮化合物、磷、碳酸盐、镁、钠、钾、氯化物、硫酸盐、钙、氟化物、二氧化硅以及碳的含量。

大柏树国家保护区（Big Cypress National Preserve, BICY）与大沼泽国家公园（Everglades National Park, EVER）各自维护独立的水文监测站网，用于对其辖区内的地表水水位与水质开展监测。上述站点采集的数据可作为历史基准，用于评估水文状况并制定各类管理决策（包括内部与外部决策）。地表水水位数据的分析相对直观，可实时开展或与历史条件对比，通常由两个园区的内部水文人员完成。而地表水水质数据的分析则更为复杂，原因在于其变化趋势较为细微、缺乏连续监测数据（BICY为双月采样，EVER为月度采样），且受地表水深度与季节影响显著。

BICY与EVER的水质样品采集与分析工作均通过与南佛罗里达水资源管理区（South Florida Water Management District, SFWMD）签订的合作协议开展。根据协议，国家公园管理局负责野外样品采集，SFWMD则提供采样设备并承担实验室分析工作。作为该合作项目的一部分，EVER自1984年起在9个“内部沼泽”测站开展月度水质采样；BICY自1995年起在10个“内部”测站开展月度水质采样，但其相关站点的水质数据最早可追溯至1988年（当时尚未纳入该合作协议）。

目前，BICY与EVER测站采集的水质数据已按短时间间隔（年度与半年度）进行归档与报告，但尚未开展覆盖全部监测参数、贯穿完整记录周期且对比两个园区的综合分析。2000年，美国地质调查局启动一项研究，从多源渠道收集、整理并解读选定的水质数据，以增进对大沼泽地与大柏树沼泽受人类活动影响区域或偏远未受干扰区域水质变化的认识。

该研究的目标之一是探寻长期水质变化趋势，并尝试将趋势与人类活动或自然因素（如农业活动、干旱、飓风、水资源管理变革等）建立关联；其二是解读最偏远、未受干扰区域的数据，尽可能确定具有充足监测数据的水质组分的自然背景浓度。研究还将尝试探寻现有水质、物理与气象参数间的相关性。此类水质与辅助数据分析，可助力为大沼泽国家公园与大柏树国家保护区制定符合“杰出佛罗里达水域”认定标准的水质规范。

研究将分析辅助数据，包括降水量、水位、流量、重大风暴发生日期以及水控措施的起止日期等，以明确其与水质变化的时间关联。