Basic (BAS) data file (model grid, active model cells, and hydraulic-head values) for the Central Valley Hydrologic Model (CVHM)

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. This digital dataset defines the model grid, active model cells in the 10 model layers, and hydraulic-head values in the 10 model layers used to initiate the transient hydrologic model of the Central Valley flow system. The Central Valley encompasses an approximate 50,000 square-kilometer region of California. The complex hydrologic system of the Central Valley is simulated using the USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006). [...]本数据集发布于2016年10月1日之前，彼时美国地质调查局（USGS）颁布的规范科学数据审核、批准与发布的政策尚未正式生效；该政策详见《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》。本数字数据集定义了中央谷地水流系统瞬态水文模型启动所需的模型网格、10个模型层中的活跃模型单元格，以及10个模型层内的水头值。中央谷地位于加利福尼亚州，覆盖面积约50000平方公里。中央谷地复杂的水文系统采用美国地质调查局（USGS）的数值模拟代码MODFLOW-FMP进行模拟（Schmid等人，2006）。[...]