Groundwater level in Nebraska Sand Hills using LIDAR-derived lake water level (contours and raster).

The data represents the groundwater level in the Nebraska Sand Hills. The groundwater level were derived using the lake water level using LIDAR observations. The groundwater level are in NAVD88 vertical datum and NAD83 Zone 14 horizontal datum. The Universal Kriging (UK) raster and contour represents the regional groundwater level while Kriging with an external drift (KED) represents local variation in water level. The contours are cleaned for artifacts.本数据集表征内布拉斯加沙丘（Nebraska Sand Hills）区域的地下水位。该地下水位数据由基于激光雷达（LIDAR）观测获取的湖泊水位反演得到。地下水位数据采用北美垂直基准面1988（NAVD88）作为垂直基准，北美基准面1983第14带（NAD83 Zone 14）作为水平基准。泛克里金（Universal Kriging，UK）栅格与等值线用于表征区域尺度地下水位分布，而带外部漂移的克里金（Kriging with an external drift，KED）则用于刻画水位的局地变化特征。已对该等值线数据进行伪影校正处理。