GSP Annual Report
3-015 SANTA YNEZ RIVER VALLEY
2021 (OCT. 2020 - SEP. 2021)
Multiple Annual Reports
GSP Local ID: Eastern Management Area
GSP Annual Report Information Comments
03/31/2022 1:57 PM
2021 (OCT. 2020 - SEP. 2021)
Multiple Annual Reports
A Groundwater Extraction
Total Groundwater Extractions (AF)
16,971
Water Use Sectors
3,592
0
13,379
0
0
0
0
B Groundwater Extraction Methods
Meters
1,251
Direct
Other
The City of Solvang and ID No. 1 provide metered groundwater use data
Meters are calibrated and the accuracy of metered production data for the City of Solvang and ID No. 1 is considered high.
Electrical Records
0
Land Use
10,953
Estimate
Other
Outside of SYRWCD boundaries, OpenET was used to estimate crop water uses at the field scale. OpenET is a remote sensing tool that can be used to estimate potential and actual evapotranspiration values from planted crops.
OpenET software accuracy is considered medium.
Groundwater Model
0
Other
4,767
Estimate
Other
Pumpers within the SYRWCD boundaries self-reported production data for domestic and agricultural purposes. Mutual water companies' water use estimates are based on population data. Rural domestic groundwater extraction was estimated based on an aerial survey and estimated water demand based on parcel size.
Self-reported pumping volume accuracy is considered low due to the uncertainty of standardized crop water duty factors and reliability of self-reporting. The accuracy of mutual water companies' estimates based on population data is medium. The accuracy of rural domestic groundwater use is considered medium due to variability of water demand based on parcel size.
C Surface Water Supply
Total Surface Water Supply (AF)
5,208
Methods Used to Determine
Water imported from the State Water Project is metered. Some water extracted from the Santa Ynez River Alluvium is metered, and some water use is self-reported based on planted acreages and crop-specific water duty factors.
Water Source Types
0
2,051
0
3,157
0
0
0
0
D Total Water Use
Total Water Use (AF)
22,179
Methods Used to Determine
Municipal water production and surface water delivery are metered. Groundwater and river well pumping are reported by SYRWCD. Agricultural and rural domestic water uses outside SYRWCD boundaries are estimated based on land use methods (OpenET), population estimates, and water use factors based on parcel size.
Water Source Types
16,971
5,208
0
0
0
Water Use Sectors
7,451
0
14,728
0
0
0
0
E Change in Storage
Method used to calculate change in storage
Change in storage for the Careaga Sand was calculated based on annual changes in spring groundwater elevation contour maps and the aquifer storage coefficient. Change in storage for the Paso Robles Formation was estimated based on the overall water budget (for both aquifers) less the change in storage for the Careaga Sand. The portion of the total change in storage which did not occur in the Careaga Sand occurred in the Paso Robles Formation.
