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Provisional dataset: California Basin Characterization Model v8 Historical Long Term Average (1981-2010) Recharge and Runoff

Metadata


Identification Information

Citation

Citation Information

Originator:  Lorraine Flint
Originator:  Alan Flint
Originator:  James Thorne
Originator:  Ryan Boynton

Publication Date:  2017

Title:  Provisional dataset: California Basin Characterization Model v8 Historical Long Term Average (1981-2010) Recharge and Runoff

Data Presentation Form:  ASCII grid file (.asc)

Publication Information:  
Publication Place:  Reston, VA
Publisher:  U.S. Geological Survey

Online Linkage:  https://dx.doi.org/10.1186/2192-1709-2-25

Larger Work Citation:  

Citation Information

Originator:  Lorraine Flint
Originator:  Alan Flint
Originator:  James Thorne
Originator:  Ryan Boynton

Publication Date:  2013

Title:  Fine-scale hydrologic modeling for regional landscape applications: the California Basin Characterization Model development and performance

Data Presentation Form:  Scientific Article

Publication Information:  
Publication Place:  Berlin, Germany
Publisher:  Springer Nature

Online Linkage:  doi:10.1186/2192-1709-2-25


Description

Abstract

The California Basin Characterization Model (CA-BCM 2014) dataset provides historical and projected climate and hydrologic surfaces for the region that encompasses the state of California and all the streams that flow into it (California hydrologic region). The CA-BCM 2014 applies a monthly regional water-balance model to simulate hydrologic responses to climate at the spatial resolution of a 270-m grid. The historical data is based on 800m PRISM data spatially downscaled to 270 m using the gradient-inverse distance squared approach (GIDS). The BCM approach uses a regional water balance model based on this high resolution precipitation and temperature as well as elevation, geology, and soils to produce surfaces for the following variables: precipitation, air temperature, April 1st snowpack, recharge, runoff, potential evapotranspiration (PET), actual evapotranspiration, and climatic water deficit, a parameter that is calculated as PET minus actual evapotranspiration. Data variables included in this release: Recharge - Amount of water that penetrates below the root zone, mm (rch) and Runoff - Amount of water that becomes stream flow, mm (run). Model inputs include: precipitation, air temperature, and potential evapotranspiration. Model outputs are: actual evapotranspiration, climatic water deficit, April snow pack, recharge and runoff. These provisional results include estimates of natural recharge and runoff as a 30-year mean (1981-2010).

The provisional BCMv8 is a refined version of the Basin Characterization Model (v65, Flint and others, 2013; Flint and Flint, 2014). It has been revised to include 7 new features;

  1. monthly vegetation-specific actual evapotranspiration for 65 vegetation types,
  2. spatially distributed calibration coefficients for snow accumulation and snowmelt,
  3. mapped soil organic matter,
  4. soil hydraulic properties calculated from soil texture and soil organic matter (model runs done with water content at field capacity of -0.01 MPa and wilting point of -6 MPa),
  5. soil dry out below wilting point at a rate driven by average statewide aridity,
  6. a switch allowing for the incorporation of urban impermeable surfaces, and
  7. internally calculated gaining and losing streams.

Rigorous calibrations have been performed statewide to improve the accuracy of all components of the water balance. Precipitation, snow processes, and the energy balance are developed and calibrated statewide. Calibrations are done to constrain the other variables, AET as a function of available soil water and vegetation type, recharge versus runoff as a function of soil storage and bedrock permeability. Calibration exercises have been done using a series of approaches to develop confidence in the regional estimates. Regional calibration means that errors are minimized statewide, and because they rely on bedrock types and vegetation types that may span across very large areas, errors may be positive or negative in different watersheds. Baseflow separation analyses at 160 streamgages, 20 basins for which recharge is estimated for groundwater flow modeling, gridded actual evapotranspiration estimates for 2000-2013 for 65 vegetation types, estimates of full natural flows from DWR (CDEC) for basins draining into the Central Valley, and 65 small basins with relatively unimpaired streamflow gages. Because of the regional calibration and associated errors, additional local calibration may be necessary to get the highest accuracy estimates for calculating the water budget in a given watershed. Model results are “unimpaired”, meaning they represent natural hydrologic conditions where water is not extracted from or delivered to a basin. Locations with mapped irrigated agriculture assume no irrigation and are treated as annual grasslands, and mapped urban footprints (from 2014 vegetation map) assume impermeable surfaces are represented by a bedrock permeability similar to granite for the whole footprint in the vegetation map, which increases runoff and decreases recharge in comparison to permeable surfaces.

Purpose

BCMv8 has been developed to improve quantitative estimates of the components of the water balance, include vegetation types, and increase ability to evaluate disturbance and management actions at local, watershed, and regional scales.

Time Period of Content

Time Period Information

Range of Dates/Times:  
Beginning Date:  19801001
Ending Date:  20100930

Currentness Reference

ground condition

Status

Progress:  Complete
Maintenance and Update Frequency:  As needed

Spatial Domain

Bounding Coordinates

West Bounding Coordinate:  -124.71679687362
East Bounding Coordinate:  -113.90624999905
North Bounding Coordinate:  43.132741865211
South Bounding Coordinate:  32.361033737162

Keywords

Theme

Theme Keyword Thesaurus:  geospatial data

Theme Keyword:   Basin Characterization Model
Theme Keyword:   Precipitation
Theme Keyword:   Maximum temperature
Theme Keyword:   Minimum temperature
Theme Keyword:   Climatic water deficit
Theme Keyword:   Potential evapotranspiration
Theme Keyword:   Actual evapotranspiration
Theme Keyword:   April snowpack
Theme Keyword:   Recharge
Theme Keyword:   Runoff
Theme Keyword:   Gridded meteorological data
Theme Keyword:   Gridded hydrological data

Place

Place Keyword Thesaurus:  Geographic Names Information System

Place Keyword:   California

Constraints

Access Constraints

none

Use Constraints

none

Point of Contact

Contact Organization Primary

Contact Organization:  USGS PACIFIC REGION

Contact Person:   Lorraine E Flint

Contact Address:

Address Type:  mailing and physical

Address:  6000 J Street Placer Hall
City:  Sacramento
State or Province:   CA
Postal Code:   95819

Contact Telephone:  916-278-3223

Contact Email:  lflint@usgs.gov

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Data Quality Information

Attribute Accuracy Report

No formal attribute accuracy tests were conducted.

Logical Consistency Report

No formal logical accuracy tests were conducted.

Completeness Report

Data set is considered complete for the information presented, as described in the abstract. Water balance calculations are not performed in locations mapped as water bodies and results in cells with no data. Users are advised to read the rest of the metadata record carefully for additional details and proper use of this data set.

Positional Accuracy Report

Horizontal Positional Accuracy Report

No formal positional accuracy tests were conducted

Vertical Positional Accuracy Report

No formal positional accuracy tests were conducted

Lineage

Source Information:

Source Citation:

Citation Information:

Originator:  Lorraine Flint
Publication Date:  2013
Title:  California Basin Characterization Model Downscaled Climate and Hydrology
Geospatial Data Presentation Form:  ascii grid files

Publication Information:

Publication Place:  https://cida.usgs.gov/thredds/CA-BCM-Catalog.html
Publisher:  Center for Integrated Data Analytics

Online Linkage:  https://cida.usgs.gov/thredds/CA-BCM-Catalog.html

Type of Source Media:  Raster grids

Source Citation:

Source Time Period of Content:

Date Range:  

Begining Date:  19801001
Ending Date:  20100930

Source Currentness Reference:  ground condition

Source Citation Abbreviation:  BCM

Source Contrabution:  Model ouptut

Process Step:

Process Description:  Dataset includes raw model output ASCII grids (.asc).

Process Date:  2017

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Spatial Data Organization Information

Direct Spatial Reference Method

Raster

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Spatial Reference Information

Horizontal Coordinate System Definition

Planar

Map Projection:

Map Projection Name:  Albers Conic Equal Area

Albers Conical Equal Area:

Standard Parallel:  34.0
Standard Parallel:  40.5
Longitude of Central Meridian:  -120.0
Latitude of Projection Origin:  0.0
False Easting:  0.0
False Northing:  -4000000.0

Planar Coordinate Information:

Planar Coordinate Encoding Method:  coordinate pair

Coordinate Representation:

Abscissa Resolution:  270.0
Ordinate Resolution:  270.0

Planar Distance Units:  meters

Geodetic Model

Horizontal Datum Name:  North American Datum of 1983
Ellipsoid Name:  Geodetic Reference System 80
Semi-major Axis:  6378137.0
Denominator of Flattening Ratio:  298.257222

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Entity and Attribute Information

Detailed Description

Entity Type

Entity Type Label:  Historical California Basin Characterization Model Downscaled Climate and Hydrology
Entity Type Definition:  Climate and model outputs
Entity Type Definition Source:  Basin Characterization Model, 2014

Attribute

Attribute Label:  Recharge (rch)

Attribute Definition:

Amount of water that penetrates below the root zone.

Attribute Definition Source:  USGS Basin Characterization Model, 2014

Attribute Domain Values:

Range Domain:

Range Domain Minimum:  0
Range Domain Maximum:  2479.43
Attribute Units of Measure:  millimeters (mm)

Attribute

Attribute Label:  Runoff (run)

Attribute Definition:

The amount of water that becomes stream flow.

Attribute Definition Source:  USGS Basin Characterization Model, 2014

Attribute Domain Values:

Range Domain:

Range Domain Minimum:  0
Range Domain Maximum:  4185.37
Attribute Units of Measure:  millimeters (mm)

Overview Description

Entity and Attribute Overview:

The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set.

Entity and Attribute Detail Citation:

The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

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Distribution Information

Distributor

Contact Organization Primary

Contact Organization:  USGS PACIFIC REGION

Contact Person:   Lorraine E Flint

Contact Address:

Address Type:  mailing and physical

Address:  6000 J Street Placer Hall
City:  Sacramento
State or Province:   CA
Postal Code:   95819

Contact Telephone:  916-278-3223

Contact Email:  lflint@usgs.gov

Distribution Liability

"Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty."

Technical Prerequisites

ASCII (.asc) grid files can be opened and manipulated with any text editor as well as visualization software such as ArcGIS. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data like ArcExplorer.

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Metadata Reference Information


Metadata Date:  20170724

Metadata Contact

Contact Organization Primary

Contact Organization:  USGS PACIFIC REGION

Contact Person:   Lorraine E Flint

Contact Address:

Address Type:  mailing and physical

Address:  6000 J Street Placer Hall
City:  Sacramento
State or Province:   CA
Postal Code:   95819

Contact Telephone:  916-278-3223

Contact Email:  lflint@usgs.gov

Metadata Standard Name:  Content Standard for Digital Geospatial Metadata

Metadata Standard Version:  FGDC-STD-001-1998

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