Measured compaction for 24 extensometers in the Central Valley
Description
This digital dataset contains the compaction data for 24 extensometers used for observations in the
Central Valley Hydrologic Model (CVHM). 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). This simulation
is referred to here as the CVHM (Faunt, 2009). Utilizing MODFLOW-FMP, the CVHM simulates
groundwater and surface-water flow, irrigated agriculture, land subsidence, and other key processes in
the Central Valley on a monthly basis from 1961-2003. The total active modeled area is 20,334 square-miles.
Water levels, water-level altitude changes, and water-level and potentiometric-surface altitude maps;
streamflows; boundary flows; subsidence; groundwater pumpage; water use; and water-delivery observations
were used to constrain parameter estimates throughout the calibration of the CVHM. Measured compaction
from extensometers placed in the valley was used as a subsidence calibration target. The extensometer
locations were obtained from USGS files and GPS locations. Subsidence monitoring observations can provide
valuable information about hydrologic parameters such as elastic and inelastic skeletal specific storage. The
CVHM was adjusted to fit the range of measured compaction at the extensometer sites utilizing UCODE-2005
(Poeter and others, 2006) and manual calibration. The calibration target was the measured compaction from
several extensometers in the region. Compaction though delayed drainage and re-pressurizing of aquitards
was not simulated. The CVHM is the most recent regional-scale model of the Central Valley developed by the
U.S. Geological Survey (USGS). The CVHM was developed as part of the USGS Groundwater Resources
Program (see "Foreword", Chapter A, page iii, for details).
Resources
| Name |
Format |
Description |
Link |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.f3ffc715-ba59-437a-87d1-9fee74d0812e.xml |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/P93V7RAP |
Tags
- el-dorado-county
- glenn-county
- mendocino-county
- central-valley
- stanislaus-county
- sonoma-county
- groundwater
- lake-county
- cv-rasa
- san-joaquin-county
- shasta-county
- merced-county
- nevada-county
- kings-county
- kern-county
- colusa-county
- central-valley-hydrologic-model
- yolo-county
- sutter-county
- santa-barbara-county
- san-luis-obispo-county
- tuolumne-county
- sacramento-county
- subsidence
- calaveras-county
- unconsolidated-sediments
- solano-county
- mariposa-county
- tulare-county
- sacramento-valley
- placer-county
- monterey-county
- contra-costa-county
- groundwater-availability-of-the-central-valley-aquifer
- california
- texture-model
- madera-county
- inlandwaters
- model
- geostatistics
- yuba-county
- hydrogeology
- ventura-county
- tehama-county
- extensometer
- butte-county
- trinity-county
- amador-county
- san-joaquin-valley
- san-benito-county
- usgs-f3ffc715-ba59-437a-87d1-9fee74d0812e
- humboldt-county
- hydrology
- napa-county
- central-valley-aquifer
- flow-model-cvhm
- alameda-county
- fresno-county
- santa-clara-county
- central-valley-california