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BackScott River Stream System Annual Report 10/01/2021 - 09/30/2022
Watermaster Information
| Scott River Stream System |
1-05 SCOTT RIVER VALLEY |
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| Scott River Adjudication | 30662 | 01/30/1980 | |
| Not Applicable, No Water Master, This information is being submitted by the County. | 806 S Main St | Yreka | 96097 |
| rdean@co.siskiyou.ca.us | (530) 841-2100 | ||
| Dan Wessell | 806 S Main St | Yreka | 96097 |
| dwessell@co.siskiyou.ca.us | (530) 841-2100 | ||
| ScottRiverDecree_30662_1980.pdf (4.4MB) | |||
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A
Groundwater Level
Is water level data submitted to the CASGEM Program?
Yes
Does this watermaster collect or receive additional groundwater levels?
No
Does this watermaster measure groundwater levels?
No
Comment(s)
A statistical summary of water level data from an extensive private monitoring program is available at http://groundwater.ucdavis.edu/Research/ScottValley/
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B
Groundwater Use
Reporting Period
From 10/01/2021 To 09/30/2022
Total Annual Groundwater Extraction (AF)
Method used to determine extraction (if available):
| Volume (AF) | Explanation | Uncertainty | |
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Groundwater Extraction by water use sector (if available):
| Sector | Volume (AF) | Explanation | Uncertainty |
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C
Surface Water Use
Reporting Period
From 10/01/2021 To 09/30/2022
Surface Water Supply (AF)
Method used to determine
Surface water use of 24,000 - 28,000 af represent the entire Scott Valley groundwater basin (DWR Basin 1-5). These values are based on the estimated average annual surface water irrigation amount in 1991-2011. The range is based on the current calibration of the soil water budget model used by the UC Davis Scott Valley Intergrated Hydrologic Model, and includes the estimtate from the soil water budget model published by Foglia et al., 2013a,b, available at http://groundwater.ucdavis.edu/Research/ScottValley/. A drought emergency curtailment order was in effect for the entire water year. The reduction of surface water use relative to 2020 (another dry year) is currently not known and has not been included in the estimate at this time.
Uncertainty
Low
Water available for recharge or in-lieu use by source type (if available):
| Volume (AF) | Explanation | Uncertainty | |
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D
Total Water Use
Reporting Period
From 10/01/2021 To 09/30/2022
Total Water Use (AF)
Method used to determine
sum of groundwater use and surface water use described in B and C (above)
Uncertainty
Medium
Total water Use by water use sector (if available)
| Volume (AF) | |
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Water use met by source type
| Type | Volume (AF) |
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E
Change in GW Storage
Reporting Period
From 10/01/2021 To 09/30/2022
Change in storage (AF)
Method used to determine
In the private monitoring well network (13 wells), water levels measured in March of 2022 were, on average, 0.1 feet higher than during the same period in 2021 indicating an overall stability in groundwater storage (see water level report at http://groundwater.ucdavis.edu/Research/ScottValley/). In DWR's Water Data Library, two wells have water levels documented for both, spring 2021 and spring 2022. Between spring 2021 and spring 2022 water levels in these two wells decreased by 4.7 feet, on average (https://sgma.water.ca.gov/webgis/?appid=SGMADataViewer#gwlevels; accessed February 9, 2022). These two wells were not considered to compute groundwater storage change between 2021 and 2022. The current UC Davis Scott Valley Integrated Hydrologic Model (https://doi.org/10.1029/2018WR024209) was used to determine the relationship between water levels at the original 32 locations of the private monitoring well network and total groundwater storage in the Scott Valley aquifer, which extends over approximately 50,000 acres of alluvium, for the period from 10/1/1990 to 9/30/2011. Based on simulated annual change in storage and simulated water levels at the location of the original 32 private monitoring wells, it was estimated that the average total annual groundwater storage change is between 3 thousand and 5 thousand acre-feet for each one foot change in average water levels in the monitoring well network during January through March. The statistical uncertainty of the estimated storage change of zero acft is +/-2.5 thousand acre-feet.
Uncertainty
Medium
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F
Required Documents
Reporting Period
From 10/01/2021 To 09/30/2022
Please submit an electronic (PDF preferred) copy of your annual report.
Adjudicated Basins Annual Reporting System - 2023 (002).pdf (92.5kB)
Uploaded on 03/28/2023 at 10:31AM
Please submit additional reports or documents.
