Model files and GIS data for risk assessment in the Cambrian-Ordovician sandstone aquifer system, Northeastern Illinois, predevelopment-2070

These datasets contain modeling files and GIS data associated with a risk assessment study for the Cambrian-Ordovician sandstone aquifer system in Illinois from predevelopment (1863) to the year 2070. Modeling work was completed using the Illinois Groundwater Flow Model, a regional MODFLOW model developed for water supply planning in Illinois, as a base model. The model is run using the graphical user interface Groundwater Vistas 7.0. The development and technical details of the base Illinois Groundwater Flow Model, including hydraulic property zonation, boundary conditions, hydrostratigraphy, solver settings, and discretization, are described in Abrams et al. (2018). Modifications to this base model (the version presented here) are described in Mannix et al. (2018), Hadley et al. (2020) and Abrams and Cullen (2020). Modifications include removal of particular multi-aquifer wells to improve calibration, changing Sandwich Fault Zone properties to achieve calibration at production wells within and near the fault zone, and the incorporation of demand scenarios based on a participatory modeling project with the Southwest Water Planning Group. The zipped folder of model files contains MODFLOW input (package) files, Groundwater Vistas files, and a head file for the entire model run. The zipped folder of GIS data contains rasters of: simulated drawdown in the St. Peter sandstone from predevelopment to 2018, simulated drawdown in the Ironton-Galesville sandstone from predevelopment to 2018, simulated head difference between the St. Peter and Ironton-Galesville sandstone units in 2018, simulated head above the top of the St. Peter sandstone for the years 2029, 2050, and 2070, and simulated head above the top of the Ironton-Galesville sandstone for the years 2029, 2050, and 2070. Raster outputs were derived directly from the simulated heads in the Illinois Groundwater Flow Model. Rasters are clipped to the 8 county northeastern Illinois region (Cook, DuPage, Grundy, Kane, Kendall, Lake, McHenry, and Will counties). Well names, historic and current head targets, and spatial offsets for the Illinois Groundwater Flow Model are available upon request via a data license agreement. Please contact authors to set this up if needed.

本数据集包含与伊利诺伊州寒武纪-奥陶纪砂岩含水层系统风险评估研究相关的建模文件和地理信息系统数据。该研究涵盖了从开发前（1863年）至2070年的长期时段。建模工作基于伊利诺伊州地下水流动模型（Illinois Groundwater Flow Model），该模型为伊利诺伊州供水规划而开发的区域MODFLOW模型，并以此作为基础模型。模型运行采用图形用户界面Groundwater Vistas 7.0。基础伊利诺伊州地下水流动模型（包括水力性质分区、边界条件、水文地层学、求解器设置和离散化等）的开发和技术细节，由Abrams等人（2018年）所述。对基础模型（此处展示的版本）的修改，包括在Mannix等人（2018年）、Hadley等人（2020年）以及Abrams和Cullen（2020年）的文献中描述。修改内容涉及移除特定多含水层井以优化校准，调整桑德什断层带属性以实现生产井在校准过程中的校准，以及基于与西南水资源规划小组的参与式建模项目的需求场景的整合。压缩文件夹包含MODFLOW输入（包）文件、Groundwater Vistas文件以及整个模型运行的头部文件。GIS数据的压缩文件夹包含以下栅格数据：从开发前至2018年模拟的圣彼得砂岩降水位、从开发前至2018年模拟的艾尔顿-盖尔西维尔砂岩降水位、2018年圣彼得砂岩与艾尔顿-盖尔西维尔砂岩单元之间的模拟水位差、2029年、2050年和2070年圣彼得砂岩顶部的模拟水位以及2029年、2050年和2070年艾尔顿-盖尔西维尔砂岩顶部的模拟水位。栅格输出直接来源于伊利诺伊州地下水流动模型的模拟水位。栅格数据已裁剪至伊利诺伊州东北部8个县（库克县、杜佩奇县、格里茨县、凯恩县、肯德尔县、湖县、麦亨利县和威尔县）的区域。伊利诺伊州地下水流动模型的可请求信息包括井名、历史和当前的水头目标以及空间偏移量，可通过数据许可协议获取。如需设置，请联系作者。