GSP Annual Report
5-021.70 BUTTE
2021 (OCT. 2020 - SEP. 2021)
Single Annual Report
GSP Annual Report Information Comments
03/30/2022 4:28 PM
2021 (OCT. 2020 - SEP. 2021)
Single Annual Report
A Groundwater Extraction
Total Groundwater Extractions (AF)
280,700
Water Use Sectors
2,200
0
277,900
0
0
0
600
Rural Residential
B Groundwater Extraction Methods
Meters
2,200
Direct
5-10 %
Metered Municipal Wells
Metered connections maintained by City of Biggs and City of Gridley
Electrical Records
0
Land Use
277,900
Estimate
20-30 %
Land use estimates were used with locally derived crop coefficients and irrigation efficiencies. Groundwater pumping estimated after precipitation and surface water deliveries were accounted for.
Typical accuracy for crop coefficient and reference ET methodology.
Groundwater Model
0
Other
600
Estimate
10-20 %
Rural residential groundwater extraction is estimated based on the California Water Service Company 2020 Urban Water Management Plan 2020 usage of an average per capita water use of 184 gallons per capita per day. Population data from the 2020 census was coupled with parcel data to identify total population not serviced by municipal supplies.
Uncertainties arise from population estimates and gpcd estimates
C Surface Water Supply
Total Surface Water Supply (AF)
815,700
Methods Used to Determine
Deliveries reported from SB88 measurements and diversions for local supplies are estimated based on historic State Water Resource Control Board eWRIMS (Electronic Water Rights Information Management System) data for total diversions. Surface water delivery estimates are based on historic deliveries in the area that have occurred in dry and critical years.
Water Source Types
0
0
0
815,700
0
0
0
0
D Total Water Use
Total Water Use (AF)
1,094,400
Methods Used to Determine
Methods used are a combination of estimates based on land use and population/per capita water use, metered municipal/industrial water use, SB88 measurements, and estimates based on historic water rights data for dry and critical years.
Water Source Types
280,700
815,700
0
0
0
Water Use Sectors
2,200
0
1,093,600
0
0
0
600
Rural Residential (private domestic wells)
E Change in Storage
Method used to calculate change in storage
Estimated change in storage was based on groundwater level change from spring 2020 to spring 2021 at each RMS well, a representative storage coefficient of 0.1 for the Primary Aquifer and 0.00001 for the Very Deep Aquifer, and Thiessen polygons defining a representative area for each RMS well. The representative storage coefficient for the Primary Aquifer was established by roughly calibrating estimated change in storage based on changes in observed water levels (i.e. calculated using water level data, representative area, and storage coefficient parameter) with estimated change in storage outputs from the Butte Basin Groundwater Model as reported in the GSP to aggregate characteristics across all zones of the Primary Aquifer system. A total of 20 pairs of concurrent annual storage changes from both of these methods (i.e., 1. groundwater level change method used in this report, and 2. modeled storage changes from the GSP) from 1999 through 2018 were used for calibration. The storage coefficient for the Very Deep Aquifer is consistent with the parameter used for the confined portion of the system in the Butte Basin Groundwater Model.
F Monitoring Network Module
G PMA Module
PMA Implementation Updates Implementation Update Export (CSV) PMA Export (CSV)
| PMA ID | PMA Name | Lead GSA | Status | # Updates during WY |
|---|---|---|---|---|
| 5-021.70_PMA_1 | System modernization (Biggs-West Gridley Water District) | Biggs-West Gridley Water District GSA | Submitted | 0 |
| 5-021.70_PMA_7 | Multi-benefit recharge | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_16 | Improve monitoring of surface water outflows and refine water balances to improve understanding of surface water/groundwater interactions/net recharge | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_21 | Monitoring well installation | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_14 | Facilitate financing of capital improvements for on-farm irrigation systems | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_13 | Develop partnerships to implement project addressing regional water management | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_15 | Facilitate use of available recycled water that otherwise would not be used beneficially, meets all health and safety criteria, and does not harm crops or soils | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_8 | Grower education | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_9 | Installation of additional shallow monitoring wells | Western Canal Water District GSA | Submitted | 0 |
| 5-021.70_PMA_23 | Re-establish historical monitoring locations and identify new sites | County of Butte GSA - Butte 1 | Submitted | 0 |
| 5-021.70_PMA_4 | System Modernization (Western Canal Water District GSA) | Western Canal Water District GSA | Submitted | 0 |
| 5-021.70_PMA_5 | Boundary flow and primary spill measurement (Western Canal Water District) | Western Canal Water District GSA | Submitted | 0 |
| 5-021.70_PMA_18 | Increase planned conjunctive use of surface water and groundwater within the supplier service area | Western Canal Water District GSA | Submitted | 0 |
| 5-021.70_PMA_19 | Little Butte Creek Reservoir main canal bypass project | Western Canal Water District GSA | Submitted | 0 |
| 5-021.70_PMA_2 | System modernization (Butte Water District) | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_6 | Dual source irrigation systems | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_11 | Boundary flow and primary spill measurement (Butte Water District) | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_17 | Improved delivery service to pressurized irrigation systems | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_20 | M&T - Llano Seco fish screen project | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_22 | Parrot Phelan Diversion restoration project | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_24 | Removal of bottlenecks on the Sutter-Butte main canal | Butte Water District GSA - Butte | Submitted | 0 |
| 5-021.70_PMA_3 | System modernization (Richvale Irrigation District) | Richvale Irrigation District GSA | Submitted | 0 |
| 5-021.70_PMA_10 | Alternate delivery to RID Secondary via Kelleher Dam | Richvale Irrigation District GSA | Submitted | 0 |
| 5-021.70_PMA_12 | Boundary flow and primary spill measurement (Richvale Irrigation District) | Richvale Irrigation District GSA | Submitted | 0 |
| 5-021.70_PMA_25 | Shu Fly/Cherokee Project | Richvale Irrigation District GSA | Submitted | 0 |
