Minimum Depth to Groundwater for Coastal Alameda County

NOTE: The authors believe that this dataset is likely to be LESS accurate than using a clip of the larger San Francisco Bay groundwater dataset, here: https://dash.berkeley.edu/stash/dataset/doi:10.6078/D1W01Q. The reason is that additional datapoints and editing were used to improve the San Francisco Bay groundwater map after this Alameda County map was produced. We expect that the most recent San Francisco Bay map is the most accurate, even for smaller geographic scales.

This dataset contains a comparison of four interpolation methods used to estimate a minimum depth to groundwater surface for Alameda County, within one kilometer/0.6 mi of San Francisco Bay. The interpolation is based on well data from the CA State Water Board GAMA GeoTracker database, and the depth to water was calculated using a 2m USGS Digital Elevation Model.

注意：作者团队认为，本数据集的精度大概率低于更大范围的旧金山湾地下水数据集，相关数据集链接为：https://dash.berkeley.edu/stash/dataset/doi:10.6078/D1W01Q。究其原因，在本阿拉米达县数据集制作完成后，研究人员通过补充更多数据点并开展编辑优化工作，对旧金山湾地下水分布图进行了改进。我们认为，即便针对较小地理尺度，最新版的旧金山湾地下水分布图仍具备最高精度。
本数据集包含四种插值方法的对比结果，用于估算距旧金山湾1公里/0.6英里范围内阿拉米达县的地下水埋深最小值。插值计算基于加州州水委员会GAMA GeoTracker数据库中的水井数据，地下水埋深通过美国地质调查局（United States Geological Survey, USGS）2米分辨率数字高程模型（Digital Elevation Model, DEM）计算得出。