Alternative Annual Report
2-010 LIVERMORE VALLEY
2023 (OCT. 2022 - SEP. 2023)
A Groundwater Extraction
Total Groundwater Extractions (AF)
9,769
Water Use Sectors
8,736
0
813
0
0
0
220
Golf
B Groundwater Extraction Methods
Meters
8,667
Direct
0-5 %
Readings by Zone 7 and other municipal pumpers
Direct meter readings
Electrical Records
0
Land Use
813
Estimate
5-10 %
Estimated using DWR's Integrated Water Flow Model Demand Calculator (IDC)
Accuracy estimated based on accuracy of model inputs.
Groundwater Model
0
Other
289
Estimate
5-10 %
Pumping for golf courses, domestic, and mining use.
Estimated by number of wells, past data, and/or typical use.
C Surface Water Supply
Total Surface Water Supply (AF)
52,741
Methods Used to Determine
Reported by DWR and retailers
Water Source Types
0
42,400
0
4,200
0
6,141
0
0
D Total Water Use
Total Water Use (AF)
48,649
Methods Used to Determine
Sum of groundwater, surface water, and recycled water.
Water Source Types
9,769
32,739
6,141
0
0
Water Use Sectors
42,955
0
5,694
0
8,600
0
0
E Change in Storage
Principal Aquifer Name |
Change In Storage (AF) |
|---|---|
| Main Basin | 28378.0 |
| Total | 28378.0 |
Method used to calculate change in storage
Zone 7 uses two methods for calculating groundwater storage. The Groundwater Elevation (GWE) method uses groundwater level data and storage coefficients for nodes originally developed by DWR in 1974 to estimate the total volume of water in the Basin. The Hydrologic Inventory (HI) method, also known as the Water Budget, involves an accounting of all inflows and outflows and derivation of the change in storage as the residual of the water budget equation. Storage volumes from the two methods are averaged to quantify the total storage of the Basin.
