LANLoad NEEPP - Okeechobee County: Landscape Assessment of Nutrient Loading to Waterbodies (LANLoad) in the Northern Everglades and Estuaries Protection Program (NEEPP) Region
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This raster dataset consists of cells (9.6m x 9.6m) ranked to reflect the likelihood that nutrients applied to a given terrestrial location will reach the nearest downgradient surface waterbody. Possible ranks range from 1 to 9 with values increasing as the likelihood of nutrient transport to downgradient surface waterbodies increases. Ranks are based on six physical landscape parameters selected by Subject Matter Experts (SMEs) who also assigned relative weights to each parameter using the Analytical Hierarchy Process (AHP). During this exercise, the location considered by SMEs was the pilot study area, St. Lucie County, FL, and the focal nutrient source was Onsite Sewage and Treatment Disposal Systems (OSTDS). Despite the original focus on OSTDS, LANLoad NEEPP can be used to gauge the likelihood of nutrient transport to surface waterbodies from other, similar, nutrient sources. The resulting AHP model demonstrated high internal consistency (Consistency Ratio: 0.01) and resulted in the following parameters and weights, in order of importance: Distance to Waterbody, 30.0%; Depth to Water, 21.6%; Hydraulic Conductivity, 20.7%; Potential for Flooding, 10.9%; Slope, 9.8%; and Surficial Karstic Deposits, 7.0%. The weights assigned by SMEs in the St. Lucie County pilot were deemed applicable to the NEEPP region due to highly similar geologic/hydrologic conditions. Relative parameter weights might not be applicable to regions without such similarities. Geospatial datasets representative of these parameters were combined using a weighted overlay to produce LANLoad NEEPP. The performance of LANLoad NEEPP was evaluated across randomly selected, stratified locations within the NEEPP region. LANLoad NEEPP categories were classified into “lower” likelihood (LANLoad NEEPP categories ≤ 4) and “higher” likelihood (LANload NEEPP categories ≥ 6). We subjected these classifications to two independent, blind evaluation methods. First, SMEs evaluated 30 locations using their best professional judgment. This expert review yielded a 92% consistency rate with LANLoad NEEPP classifications. Second, the groundwater numerical model ArcNLET-Py was used to simulate uniform nutrient loading across 10 locations, analyzing a total of 500 model points. This yielded a 100% consistency rate with the LANLoad NEEPP classifications where the locations identified by LANLoad NEEPP as "higher likelihood" directly corresponded with the highest simulated nutrient loads, while "lower likelihood" locations matched the lowest simulated nutrient loads. LANLoad NEEPP was developed in ArcGIS Pro 3.5.2 (ESRI) at a 9.6-meter resolution, using the NAD83 (2011) Datum and the Florida GDL Albers Ellipsoid: GRS 1980 projection. Standard geoprocessing workflows and authoritative reference materials were utilized to cleanse data, fill spatial gaps, and eliminate null values for the hydraulic conductivity, depth to groundwater, the National Flood Hazard Layer, and the Surficial Geology of Florida geospatial datasets. Three geospatial datasets derived from source data, Waterbodies, Distance to Waterbodies and Slope, were developed by the Balmoral Group in collaboration with the University of South Florida - Ecohydrology Research Group. Table 1: The geospatial datasets incorporated in LANLoad NEEPP (2026). Abbreviations: Federal Emergency Management Agency (FEMA), Florida Department of Environmental Protection (DEP), National Resources Conservation Service (NRCS), United States Geological Survey (USGS), University of South Florida - Ecohydrology Research Group (USF-ERG) Parameter Geospatial Dataset Source Date Acquired Waterbodies Florida NHD Waterbody Polygons DEP 3/2026 Florida NHD Area Polygons DEP 3/2026 Florida NHD Flowlines DEP 3/2026 Soil Survey Geographic Dataset (SSURGO) - FL NRCS 3/2026 Statewide Land Use Land Cover (Codes 5000 and 6000) DEP 3/2026 Distance to Waterbodies Waterbodies The Balmoral Group 3/2026 DEM USGS 3/2026 Depth to Groundwater Soil Survey Geographic Dataset (SSURGO) -FL NRCS 3/2026 Hydraulic Conductivity Soil Survey Geographic Dataset (SSURGO) -FL NRCS 3/2026 Potential for Flooding National Flood Hazard Layer FEMA 3/2026 Slope Distance to Waterbodies The Balmoral Group 5/2026 DEM USGS 3/2026 Surficial Geology Surficial Geology of Florida DEP 11/2025 Contact Information Kai C. Rains, PhD, PWS – krains@usf.edu Dataset Citation Rains, Kai; Guerron-Orejuela, Edgar; Davis, Sara; Okonkwo, Moses; Rains, Mark (2026), “LANLoad NEEPP: Landscape Assessment of Nutrient Loading to Waterbodies (LANLoad) in the Northern Everglades and Estuaries Protection Program (NEEPP) region”, University of South Florida, v03, doi: 10.17632/7nw285j9bk.3 License CC BY 4.0 Links: USF Ecohydrology Research Group LANLoad Phase III Final Report Florida Geographic Information Office Logos:
本栅格数据集由9.6米×9.6米的像元组成，各像元被赋予等级，以反映施加于某一陆地区域的养分抵达最近的下坡方向地表水体的可能性。等级取值范围为1至9，数值越高代表养分向坡下地表水体输运的可能性越大。 等级基于领域专家（Subject Matter Experts, SMEs）遴选的6项地表景观参数，专家同时采用层次分析法（Analytical Hierarchy Process, AHP）为各参数赋予相对权重。本次研究中，专家的研究区域为佛罗里达州圣露西县（St. Lucie County, FL）试点区域，核心养分来源为就地污水处置系统（Onsite Sewage and Treatment Disposal Systems, OSTDS）。 尽管初始研究聚焦于就地污水处置系统，但LANLoad NEEPP可用于评估其他同类养分来源向地表水体输运养分的可能性。构建得到的层次分析法模型表现出极高的内部一致性（一致性比率：0.01），按重要性排序的参数及对应权重如下：距水体距离（30.0%）、地下水埋深（21.6%）、导水率（20.7%）、洪水潜势（10.9%）、坡度（9.8%）以及表层喀斯特沉积（7.0%）。 鉴于大沼泽地与河口保护计划（Northern Everglades and Estuaries Protection Program, NEEPP）区域与圣露西县试点区域的地质与水文条件高度相似，专家在试点中赋予的权重被认为可适用于NEEPP区域。若区域不具备此类相似条件，则各参数的相对权重可能不适用。 采用加权叠加法将表征上述参数的地理空间数据集整合，最终生成LANLoad NEEPP数据集。研究人员在NEEPP区域内随机选取分层采样点，对LANLoad NEEPP的性能进行了评估。 LANLoad NEEPP的等级被划分为“低可能性”（等级≤4）与“高可能性”（等级≥6）两类。研究采用两种独立的盲评方法对上述分类结果进行验证：其一，30个采样点由领域专家凭借专业判断进行评估，专家评审结果与LANLoad NEEPP分类结果的一致性达92%；其二，采用地下水数值模型ArcNLET-Py对10个采样点开展均匀养分负荷模拟，共分析500个模型节点。结果显示，LANLoad NEEPP识别的“高可能性”区域与模拟得到的最高养分负荷区域完全对应，“低可能性”区域与模拟得到的最低养分负荷区域完全匹配，二者一致性达100%。 LANLoad NEEPP基于ArcGIS Pro 3.5.2（ESRI公司）开发，空间分辨率为9.6米，采用NAD83（2011）基准面及佛罗里达GDL阿尔伯斯椭球体：GRS 1980投影坐标系。研究采用标准地理处理流程与权威参考资料，对导水率、地下水埋深、国家洪水风险图层以及佛罗里达表层地质地理空间数据集进行数据清洗、空间间隙填充及空值剔除处理。 水体、距水体距离以及坡度这3项源数据派生的地理空间数据集，由巴尔莫勒尔集团（Balmoral Group）与南佛罗里达大学生态水文学研究组合作开发。 表1：LANLoad NEEPP纳入的地理空间数据集（2026年版） 缩写说明：联邦紧急事务管理局（Federal Emergency Management Agency, FEMA）、佛罗里达州环境保护部（Florida Department of Environmental Protection, DEP）、美国自然资源保护局（National Resources Conservation Service, NRCS）、美国地质调查局（United States Geological Survey, USGS）、南佛罗里达大学生态水文学研究组（University of South Florida - Ecohydrology Research Group, USF-ERG） | 参数 | 地理空间数据集 | 来源 | 获取日期 | | ---- | ---- | ---- | ---- | | 水体 | 佛罗里达州国家水文数据集（NHD）水体多边形 | DEP | 2026年3月 | | 佛罗里达州NHD区域多边形 | DEP | 2026年3月 | | 佛罗里达州NHD水系线 | DEP | 2026年3月 | | 土壤调查地理数据集（SSURGO）- 佛罗里达 | NRCS | 2026年3月 | | 全州土地利用/土地覆盖（代码5000和6000） | DEP | 2026年3月 | | 距水体距离 | 水体数据集 | 巴尔莫勒尔集团 | 2026年3月 | | 数字高程模型（DEM） | USGS | 2026年3月 | | 地下水埋深 | 土壤调查地理数据集（SSURGO）- 佛罗里达 | NRCS | 2026年3月 | | 导水率 | 土壤调查地理数据集（SSURGO）- 佛罗里达 | NRCS | 2026年3月 | | 洪水潜势 | 国家洪水风险图层 | FEMA | 2026年3月 | | 坡度 | 距水体数据集、数字高程模型（DEM） | 巴尔莫勒尔集团、美国地质调查局 | 2026年5月、2026年3月 | | 表层地质 | 佛罗里达州表层地质数据集 | DEP | 2025年11月 | 联系方式：凯·C·雷恩斯（Kai C. Rains）博士、PWS——krains@usf.edu 数据集引用：Rains, Kai; Guerron-Orejuela, Edgar; Davis, Sara; Okonkwo, Moses; Rains, Mark (2026), “LANLoad NEEPP：大沼泽地北部与河口保护计划（NEEPP）区域水体养分负荷景观评估（LANLoad）数据集”，南佛罗里达大学，版本v03，doi: 10.17632/7nw285j9bk.3 许可协议：CC BY 4.0 链接：南佛罗里达大学生态水文学研究组LANLoad第三阶段最终报告；佛罗里达州地理信息办公室 标识：
