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Location Folder Show Tree ROOT _ScienceBase Catalog __USGS California Water Science Center ___Links to Other Content of Interest Location and population served by domestic wells in the conterminous U.S.: 1990 Pesticides in Weekly Water Samples from the NAWQA Midwest Stream Quality Assessment (2013) Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (1) Types Map Service (2) OGC WFS Layer (2) OGC WMS Layer (2) Citation (1) Contacts Celia Z Rosecrans Wesley R Henson U.S. Geological Survey - ScienceBase PACIFIC REGION U.S. Geological Survey More... Categories Data (1) Publication (1) Tag Types Theme (2) Place (2) USGS Scientific Topic Keyword (2) Harvest Set (2) Label (1) Tag Schemes USGS Thesaurus (2) Geographic Names Information System (GNIS) (1) Getty Thesaurus of Geographic Names (1) View Results as: JSON ATOM CSV Browse Folder

Probability distribution grids of dissolved oxygen and dissolved manganese concentrations at selected thresholds in drinking water depth zones, Central Valley, California The ascii grids represent regional probabilities that groundwater in a particular location will have dissolved oxygen (DO) concentrations less than selected threshold values representing anoxic groundwater conditions or will have dissolved manganese (Mn) concentrations greater than selected threshold values representing secondary drinking water-quality contaminant levels (SMCL) and health-based screening levels (HBSL) for water quality. The probability models were constrained by the alluvial boundary of the Central Valley to a depth of approximately 300 meters (m). We utilized prediction modeling methods, specifically boosted regression trees (BRT) with a Bernoulli error distribution within a statistical learning... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Boosted Regression Trees, California, Central Valley, California, Domestic Well Water Use, Drinking Water Use, All tags... Groundwater, Hydrogeology, National Water Quality Program, Predictive Modeling, Public Supply Water Use, Statistical Analysis, USGS Science Data Catalog (SDC), United States, Visualization Methods, Water Quality, Water Resources, Fewer tags Model Data Set and Executables Supporting the Journal Publication for "What Makes a First-Magnitude Spring?--Global Uncertainty Analysis of a Speleogenesis Model to Gain Insight into Karst Spring Genesis" This data set provides the supporting data for the publication "What Makes a First Magnitude Sping?--Global Uncertainty Analysis of a Speleogenesis Model to Gain Insight into Karst Spring Genesis". This publication documents a speleogenesis model that was used to generate karst networks. Morris Method Global Sensitivity Analysis (MM-GSA) is used to efficiently sample input parameters to define a potential karst network. The MM-GSA provides information about sensitivity of hydrologic and transport response metrics (e.g., peak flows, peak timing, mass flux) to evaluated input parameters (e.g. network density, proto-conduit length distribution). There were 390 models in the analysis, therefore one replicate is provided... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geochemistry, Groundwater Modeling, Hydrogeology, Karst, Ocala, FL, All tags... Silver Springs, Speleogenesis, USGS Science Data Catalog (SDC), Water Resources, Fewer tags