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ITEM: |
CONSENT
CALENDAR |
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10. |
RECEIVE AND FILE
DISTRICT-WIDE ANNUAL WATER PRODUCTION SUMMARY REPORT FOR WATER YEAR 2013 |
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Meeting
Date: |
April 21, 2014 |
Budgeted: |
N/A |
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From: |
David
Stoldt, |
Program/ |
Hydrologic Monitoring |
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General
Manager |
Line Item No.: |
N/A |
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Prepared
By: |
Thomas
Lindberg |
Cost Estimate: |
N/A |
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General Counsel Review: N/A |
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Committee Recommendation: N/A |
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CEQA Compliance: N/A |
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SUMMARY: Staff has prepared a draft
Water Production Summary Report of all registered production sources, i.e.,
wells and surface water diversions, within the Monterey Peninsula Water
Management District (District) for Water Year (WY) 2013. WY 2013 covers the 12-month period from
October 1, 2012 through September 30, 2013.
Preliminary computations indicate that 16,020 acre-feet (AF) of
groundwater were produced from registered wells in the District during WY 2013
(Exhibit 10-A). In addition, 27 AF of surface water were
diverted by private users. Combined
surface and groundwater production from all sources within the District in WY 2013
is calculated at 16,046 AF. This report
presents comparisons of California American Water (Cal-Am) and non Cal-Am
production in WY 2013 and WY 2012, and compares WY 2013 production with the
District’s current water allocation program limits.
RECOMMENDATION: This
report is for informational purposes only.
The Board should review the draft summary report and provide staff with
any comments or questions. Staff will
complete and file the final report, incorporating any late revisions, if this
item is approved with the Consent Calendar.
BACKGROUND: District Rules and Regulations require well owners and operators to submit annual water production information to the District. Well production is calculated by either the Land Use or Water Meter reporting method and is described below.
Number of Wells – Presently, there are 1,189 registered wells in the District. Of this total, 827 wells are active, and 348 wells are inactive. A well is considered active if it has produced any water in the last reporting period, i.e., WY 2013. Information on the remaining 14 registered wells is not available because reporting forms were not returned by owners of those wells prior to preparation of this report.
Data Adjustments – For certain wells, staff estimated actual production to more accurately quantify water produced during WY 2013. Data adjustments were required to estimate water production from 118 wells that had either incomplete water meter records or reported water production for a period longer than the water year. Production from metered wells with incomplete records was estimated by using generalized non Cal-Am monthly distribution factors developed by staff. In 52 cases, production records were incomplete because reported meter readings covered a period shorter than WY 2013. In five other cases, production records were incomplete because meters were replaced or repaired after the start of WY 2013. The application of monthly distribution factors allowed staff to reasonably account for the percentage of production that was not reported for each of these wells, which was then added to the annual total for these wells. There were 61 cases in which production was reported for a period longer than WY 2013. Estimates of the amounts that were over-reported were made based on the monthly distribution factors. These amounts were then subtracted from the reported totals. There were also 71 cases where adjustments were made due to “order of magnitude issues” resulting from well owners incorrectly reading their water meters.
District-wide Production - Preliminary production values for WY 2013 are summarized by reporting method (i.e., Water Meter or Land Use), reporting status (i.e., active, inactive, or not reporting), and source area in Exhibit 10-A. For comparison, production values for WY 2012 are presented in Exhibit 10-B. The various source areas are shown in Exhibit 10-C. The volume of water produced from each source area is shown in Exhibit 10-D. The number of active non Cal-Am wells and the volume of water produced by each reporting method in WY 2013 and WY 2012 are compared in Exhibit 10-E.
District-wide, total water production increased by 47.6 AF (0.3%) in WY 2013 compared to WY 2012. Specifically, groundwater withdrawals decreased by 45.9 AF (0.3%), and surface diversions increased by 1.7 AF (6.8%) in WY 2013. No surface water has been diverted within the Cal-Am main system since WY 2003 because of seismic safety and sedimentation concerns at San Clemente Dam and Reservoir. WY 2004 marked the first year since 1921, when San Clemente Dam was completed, that Cal-Am or its predecessor did not divert surface water from San Clemente Reservoir.
Monterey Peninsula Water Resources System (MPWRS) – The MPWRS includes surface water in the Carmel River and its tributaries, and groundwater in the Carmel Valley alluvial aquifer, coastal subareas of the Seaside Groundwater Basin and the Laguna Seca Subarea (LSS) of the Seaside Groundwater Basin. Overall water production within the MPWRS in WY 2013 increased by 211 AF (1.5%) compared to WY 2012. Specifically, Cal-Am production in WY 2013 decreased by 376 AF (3.2%), and non Cal-Am well production increased by 587 AF (22.1%) relative to reported production in WY 2012. Cal-Am production from Carmel Valley increased 199 AF (2.6%), and Cal-Am production from the Seaside Basin decreased by 575 AF (13.4%). Non Cal-Am production from Carmel Valley increased by 565 AF (23.7%) compared to WY 2012, and non Cal-Am production from the Seaside Basin increased by 21 AF (8.0%). In WY 2013, 188 AF of potable water that was produced by the City of Sand City Desalination Plant was added to Cal-Am production because it was delivered to the Cal-Am main system.
The 7,713 AF of Cal-Am production from Carmel Valley does not include 294.5 AF of water that was delivered for injection in WY 2013 to the Aquifer Storage and Recovery (ASR) Projects, consisting of three Aquifer Storage and Recovery Wells in the Seaside Basin. 644 AF of ASR recovery water was produced for delivery to Cal-Am in WY 2013 and was included in the Cal-Am coastal Seaside production total. For reference, since the District’s Seaside ASR Program began testing in WY 1998 through the end of WY 2013, a total of 4,772 AF have been injected into the Seaside Basin.
Water Allocation Program – With respect
to the District’s Water Allocation Program limits, Cal-Am production from the
MPWRS in WY 2013 was 11,434 AF, or 6,207 AF (35.2%)
less than the Cal-Am production limit of 17,641 AF that was established with
the adoption of Ordinance No.
Lastly, it should be noted that 99% of the groundwater production within the District was reported by the water meter method in WY 2013. In addition, over 95% of registered well owners in the District reported annual production for their wells in WY 2013.
10-A District-wide Water Production Summary for Water Year 2013
10-B District-wide Water Production Summary for Water Year 2012
10-C MPWMD Water Production Source Areas
10-D Water Production by Source Area for Water Year 2013
10-E District-wide Production by Reporting
Method for non Cal-Am Wells in WY 2013 and WY
2012
10-F Comparison
of Reported Production to Production Limits within the MPWRS in
WY 2013
U:\staff\Boardpacket\2014\20140421\ConsentClndr\10\item10.docx