Digital map of the elevation of base of the upper layer of the phase-three Elkhorn-Loup Model, north-central Nebraska

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. In 2006, a cooperative study was established to compile reliable data describing groundwater and surface-water interactions in the Elkhorn and Loup River Basins. The purpose of the study was to address state legislation that requires a sustainable balance between long term water supplies and uses of surface water and groundwater. A groundwater-flow model [hereinafter referred to as the Elkhorn-Loup Model (ELM)] was constructed as part of the first two [...]

本数据集发布于2016年10月1日美国地质调查局（United States Geological Survey，USGS）相关政策生效日期之前，该政策规定了科学数据的审核、批准与发布流程，详见《USGS调查手册第502.8章：基础科学实践：科学数据发布的审核与批准》。2006年，一项合作研究启动，旨在汇编描述埃尔克霍恩河与卢普河流域内地下水与地表水交互作用的可靠数据。本研究的目标是满足州级立法要求，实现地表水与地下水长期供给与使用之间的可持续平衡。作为前两项[……]研究内容的一部分，研究团队构建了地下水流模型，下文简称埃尔克霍恩-卢普模型（Elkhorn-Loup Model, ELM）。