GSP Annual Report
5-022.16 COSUMNES
2021 (OCT. 2020 - SEP. 2021)
Single Annual Report
GSP Annual Report Information Comments
03/31/2022 4:07 PM
2021 (OCT. 2020 - SEP. 2021)
Single Annual Report
A Groundwater Extraction
Total Groundwater Extractions (AF)
149,300
Water Use Sectors
16,200
0
133,100
0
0
0
0
B Groundwater Extraction Methods
Meters
4,800
Direct
Other
City of Galt PWS meters
Unknown
Electrical Records
0
Land Use
133,100
Estimate
90-100 %
Agricultural extractions were estimated from land use and climate data using the Irrigation Demand Calculator (IDC) within Cosumnes, South American, and North American Model (CoSANA). Domestic (Agricultural-Residential [Ag-Res]) extractions were estimated based on representative indoor and outdoor water use and estimated number of residential parcels in the Basin.
Land use accuracy of 95% based on ground-truthing efforts and comparisons with other mapping methods (e.g., remote sensing).
Groundwater Model
0
Other
11,400
Estimate
Other
Reported
Unknown
C Surface Water Supply
Total Surface Water Supply (AF)
26,500
Methods Used to Determine
eWRIMs and estimated by demand
Water Source Types
0
0
0
24,100
2,400
0
0
0
D Total Water Use
Total Water Use (AF)
175,800
Methods Used to Determine
All water source types represented by a combination of metered, reported, and estimated uses.
Water Source Types
149,300
25,200
1,300
0
0
Water Use Sectors
8,200
11,000
156,600
0
0
0
0
E Change in Storage
Method used to calculate change in storage
Changes in groundwater storage were calculated using the CoSANA model, the Numerical Model for the Basin. CoSANA is a three-dimensional groundwater flow model that uses DWR?s finite-element Integrated Water Flow Model groundwater modeling platform. CoSANA was prepared to support GSP development and GSP implementation.
