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Scott River Stream System Annual Report  10/01/2016 - 09/30/2017

Watermaster Information

Scott River Stream System 1-05 SCOTT RIVER VALLEY
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 10/01/2016 To 09/30/2017 
Total Annual Groundwater Extraction (AF)
Method used to determine extraction (if available):
  Volume (AF) Explanation Uncertainty
Groundwater Extraction by water use sector (if available):
Sector Volume (AF) Explanation Uncertainty
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C

Surface Water Use

Reporting Period
From 10/01/2016 To 09/30/2017 
Surface Water Supply (AF)
Method used to determine
Surface water use of 24,000 - 27,000 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 higher number is based on the current soil water budget model used by the UC Davis Scott Valley Intergrated Hydrologic Model, and the lower number is based on the soil water budget model published by Foglia et al., 2013a,b, available at http://groundwater.ucdavis.edu/Research/ScottValley/. 
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 10/01/2016 To 09/30/2017 
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)
Water use met by source type
Type Volume (AF)
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E

Change in GW Storage

Reporting Period
From 10/01/2016 To 09/30/2017 
Change in storage (AF)
Method used to determine
In the private monitoring well network (34 wells), water levels measured in January, February, and March of 2017 were, on average, 3.8 feet higher than during the same period in 2016 indicating an overall increase in groundwater storage (see water level report at http://groundwater.ucdavis.edu/Research/ScottValley/). In DWR's Water Data Library, nine wells have water levels documented. Between spring 2016 and spring 2017, water levels in these nine wells decreased by 1.3 feet, on average, with 7 wells having higher water level in 2017 and 2 wells having lower water levels in 2017, when compared to 2016 (https://gis.water.ca.gov/app/gicima/). The current UC Davis Scott Valley Integrated Hydrologic Model was used to determine the relationship between water levels at the 34 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 34 private monitoring wells, it was estimated that the average total annual groundwater storage change is 6 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 is +/- 6 thousand acre-feet. 
Uncertainty
Medium 
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F

Required Documents

Reporting Period
From 10/01/2016 To 09/30/2017 
Please submit an electronic (PDF preferred) copy of your annual report.
2016 03 23 Section F No Annual Report.pdf (137.4kB) Uploaded on 04/03/2018 at 10:11AM
 
Please submit additional reports or documents.
ScottRiverDecree_30662_1980.pdf (4.3MB) Uploaded on 04/03/2018 at 10:11AM