GSP Annual Report
5-022.09 WESTSIDE
2019 (OCT. 2018 - SEP. 2019)
Single Annual Report
GSP Annual Report Information Comments
04/01/2020 4:13 PM
2019 (OCT. 2018 - SEP. 2019)
Single Annual Report
A Groundwater Extraction
Total Groundwater Extractions (AF)
119,000
Water Use Sectors
0
0
119,000
0
0
0
178
Small water systems (96 AF) and Domestic wells (82 AF)
B Groundwater Extraction Methods
Meters
119,000
Direct
5-10 %
821 of 910 irrigation wells were metered. Extraction of wells without meters were assumed to be similar to that of metered wells.
Accuracy can vary between meter models and calibration. Accuracy of 5-10% is an acceptable range considering this fact.
Electrical Records
0
Land Use
0
Groundwater Model
0
Other
178
Estimate
70-80 %
Estimate based on number of domestic wells and PWS self-reported values
Percent was calculated based on the number of domestic wells and PWS self-reported values.
C Surface Water Supply
Total Surface Water Supply (AF)
866,000
Methods Used to Determine
USBR monthly delivery records of San Luis Canal and other canals
Water Source Types
866,000
0
0
0
0
0
0
0
D Total Water Use
Total Water Use (AF)
985,000
Methods Used to Determine
Groundwater extraction from metered wells and monthly surface water delivery records from USBR
Water Source Types
119,000
866,000
0
0
0
Water Use Sectors
823
0
980,000
128
0
0
4,392
Small water systems (4310 AF) and Domestic wells (82 AF)
E Change in Storage
Method used to calculate change in storage
Change in storage for each principal aquifer was determined by the difference in seasonal high groundwater elevations contours from WY2018 to WY2019. The difference in groundwater elevations were multiplied by calibrated storage parameters and the area of Westside Subbasin with contour coverage.
