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Data

Basic hydrologic data collection, processing, analysis, dissemination, and archiving are major parts of the California Water Science Center program. Streamflow data, for example, are used for flood and water-supply forecasts, planning and design, river regulation, streamflow statistics, and research investigations. Much of the data are available on a near-real-time basis by satellite telemetry.

Filter Total Items: 493

Model Archive Summary for Suspended-Sediment Concentrations at U.S. Geological Survey Station 11455385, Cache Slough above Ryer Ferry Near Rio Vista, California (2018 - 2024) Model Archive Summary for Suspended-Sediment Concentrations at U.S. Geological Survey Station 11455385, Cache Slough above Ryer Ferry Near Rio Vista, California (2018 - 2024)

This Model Archive Summary (MAS) describes the development of a turbidity derived suspended-sediment concentration (SSC) time-series computation model. The MAS includes all the methods and techniques used to develop the model for USGS station 11455385, Cache Slough above Ryer Ferry, Near Rio Vista, California. The time-series suspended-sediment concentration data are representative of...

Assessing spatial variability of nutrients, phytoplankton, and related water quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2024 High-resolution mapping surveys Assessing spatial variability of nutrients, phytoplankton, and related water quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2024 High-resolution mapping surveys

Broad-area, high-resolution, boat-based water quality mapping surveys of the Sacramento-San Joaquin Delta (Delta) and Suisun Bay were conducted in May, July, and October of 2024. Each survey was comprised of four successive days of high-resolution mapping. The regions covered included the north-south axis of the Delta from the Sacramento River north of Freeport to the Harvey Banks export...

Hyperspectral measurements from prototypes of low-cost radiometers deployed across the Illinois, Delaware, Snake, and Sacramento-San Joaquin river basins from September 2023 through October 2025 Hyperspectral measurements from prototypes of low-cost radiometers deployed across the Illinois, Delaware, Snake, and Sacramento-San Joaquin river basins from September 2023 through October 2025

In-situ hyperspectral radiometer deployments offer valuable ground truth data for atmospheric corrections of satellite remote sensing over inland and coastal water bodies. These measurements can also be used to model water-quality parameters directly from hyperspectral observations, making such instruments valuable additions to the U.S. Geological Survey (USGS) water-quality monitoring...

Laboratory-based optical measurements for water samples collected from the Cache Creek watershed and settling basin, Yolo County, California Laboratory-based optical measurements for water samples collected from the Cache Creek watershed and settling basin, Yolo County, California

This data release documents measurements related to organic matter concentrations and characteristics in the Cache Creek Settling Basin in Woodland, California. Data files reported here provide full spectral results for absorbance and fluorescence analyses used for statistical modeling for proxy development. Commonly reported diagnostic absorbance wavelengths and fluorescence excitation...

Santa Ana River 270-meter Basin Characterization Model using Weather Generator Scenarios - Monthly Climate and Hydrology Santa Ana River 270-meter Basin Characterization Model using Weather Generator Scenarios - Monthly Climate and Hydrology

This data release includes the downscaled climate inputs from twenty-four Weather Generator Scenarios and hydrologic outputs using the Basin Characterization Model (BCM) version 8 (v8), described in Flint and others (2021a), with a 270 by 270-meter spatial resolution at a monthly time steps from water years 1916 to 2018 for the Santa Ana River watershed. The twenty-four Weather Generator

Santa Ana River Watershed, California 270-meter Basin Characterization Model - Monthly Historical Climate and Hydrology Santa Ana River Watershed, California 270-meter Basin Characterization Model - Monthly Historical Climate and Hydrology

This data release includes the revised downscaled climate inputs and hydrologic outputs from the Basin Characterization Model (BCM) version 8 (v8), described in Flint and others (2021a), in a 270 by 270-meter spatial resolution at a monthly time step from water years 1896 to 2025 for the Santa Ana River watershed. This data release includes five child items: 1. 30-year summaries, 2...

Global Positioning System Survey Data for 2023, and Terrestrial Laser Scanning Data for 2012 and 2024, Coachella Valley, Riverside County, California Global Positioning System Survey Data for 2023, and Terrestrial Laser Scanning Data for 2012 and 2024, Coachella Valley, Riverside County, California

This data release provides geodetic Global Positioning System (GPS) data collected in 2023 and terrestrial laser scanning (TLS) data collected in 2012 and 2024 to support land-surface subsidence assessments in the southern Coachella Valley and Mission Springs subbasin. GPS measurements were acquired during two 2023 campaigns using seven dual‑frequency Trimble NetRS receivers, Trimble...

Great Basin 200-meter Basin Characterization Model (BCMv8) - Monthly Historical Climate and Hydrology for water years 1896-2025 Great Basin 200-meter Basin Characterization Model (BCMv8) - Monthly Historical Climate and Hydrology for water years 1896-2025

The Great Basin of the United States of America (USA) spans nearly all of Nevada, much of Utah, and parts of Arizona, California, Oregon, Idaho, and Wyoming. The Basin Characterization Model (BCM) version 8 (v8; described in Flint and others, 2021) for the Great Basin is 200 by 200-meter spatial resolution with monthly intervals ranging from water years 1896 to 2025. This data release...

Modeling of nutrient and sediment concentrations and loads for Clear Lake California, using RLOADEST Modeling of nutrient and sediment concentrations and loads for Clear Lake California, using RLOADEST

Models of daily mass loads of nutrient species constituents and suspended sediment at tributary locations using water quality measurements and stream discharge from river gauging stations were developed to estimate nutrient and suspended sediment mass loads flowing into the Clear Lake watershed. Mass loads are calculated by multiplying stream discharge, measured as volume per time, by...

SPARROW model inputs and simulated Total Nitrogen and Total Phosphorus loads in the Clear Lake watershed, California SPARROW model inputs and simulated Total Nitrogen and Total Phosphorus loads in the Clear Lake watershed, California

The existing long-term Total Nitrogen (TN) and Total Phosphorus (TP) steady-state models, originally developed on a regional scale for the Pacific Region of the United States (Wise, 2019), were utilized to estimate TN and TP loads for the Clear Lake watershed. To support this analysis, input data for the Pacific Region model were updated to reflect climate, land use, and agricultural...

Water-quality data in the Cache Creek watershed and settling basin, Yolo County, California Water-quality data in the Cache Creek watershed and settling basin, Yolo County, California

This dataset includes water-quality and suspended-sediment data for 109 environmental samples collected at 14 surface-water sites in the Cache Creek (Cache C) watershed, Yolo County, California, between December 2019 and March 2024, and data for 18 associated quality-control samples (replicates and blanks). Around three-quarters of the samples were collected from three sites: Cache C...

Multicriteria Decision Analysis and Value of Information Results for the California Endangered Species Act, Incidental Take Permit Structured Decision Making Process Multicriteria Decision Analysis and Value of Information Results for the California Endangered Species Act, Incidental Take Permit Structured Decision Making Process

These data representing performance scores of alternative water management strategies have been compiled by the U.S. Geological Survey (USGS) to support the development of a research plan by the California Department of Water Resources (CDWR) and California Department of Fish and Wildlife (CDFW) to improve their decision-making in relation to the State Water Project (SWP) in 2026. The...
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