GSP Annual Report
5-029 CASTAC LAKE VALLEY
2022 (OCT. 2021 - SEP. 2022)
Single Annual Report
GSP Annual Report Information Comments
03/31/2023 1:31 PM
2022 (OCT. 2021 - SEP. 2022)
Single Annual Report
B Groundwater Extraction Methods
Meters
337
Direct
Other
Water year total and monthly groundwater pumping data for the Basin are derived from available reported flowmeter readings between October 2021 and September 2022.
Groundwater use data generally are reported by AF, with a precision of 0.001 AF, however some municipal water suppliers report in gallons, with a precision of 1.0 gallon
Electrical Records
0
Land Use
0
Groundwater Model
0
Other
0
C Surface Water Supply
Total Surface Water Supply (AF)
0
Methods Used to Determine
N/A
Water Source Types
0
0
0
0
0
0
0
0
D Total Water Use
Total Water Use (AF)
337
Methods Used to Determine
Groundwater is the only supply source within the Basin, so total water use is equal to that of total estimated groundwater extraction. Water year total and monthly groundwater pumping data for the Basin are derived from available reported flowmeter readings between October 2021 and September 2022. Groundwater use data generally are reported by AF, with a precision of 0.001 AF, however some municipal water suppliers report in gallons, with a precision of 1.0 gallon.
Water Source Types
337
0
0
0
0
Water Use Sectors
337
0
0
0
0
0
0
E Change in Storage
Method used to calculate change in storage
Changes in groundwater storage were estimated using the Castac Basin Groundwater Flow Model (Basin model), a three-dimensional numerical groundwater flow model based on the U.S. Geological Survey public-domain software platform MODFLOW-NWT. The Basin model was prepared to analyze water budget information for the Basin as part of the GSP. For WY 2022, the Basin model was updated with new pumping data and revised recharge inputs. Groundwater storage in the Basin declined approximately 210 AF for WY 2022, with a cumulative decline of approximately 2,900 AF since 2015.
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 |
|---|---|---|---|---|
| 5-029_PMA_1 | Aquifer Replenishment Project | Castac Basin GSA | 0 | |
| 5-029_PMA_2 | Cuddy Creek Bank Modifications | Castac Basin GSA | 0 | |
| 5-029_PMA_3 | Krista Emergency Interconnect with LCWD | Castac Basin GSA | 0 | |
| 5-029_PMA_4 | Wastewater Reclamation | Castac Basin GSA | 0 | |
| 5-029_PMA_5 | Frazier Mountain High School Water Project | Castac Basin GSA | 0 | |
| 5-029_PMA_6 | Well Metering and Data Collection | Castac Basin GSA | 0 |
