SLIDE 1
Chino Basin Optimum Chino Basin Optimum Basin Management Basin Management Program Program
February 6, 2006 February 6, 2006
SLIDE 2 We will talk about We will talk about
Chino Basin Basics
- Yield Maintenance/Enhancement
Yield Maintenance/Enhancement
New stormwater recharge
- Supplemental Water Recharge
Supplemental Water Recharge
Where We Go From Here
SLIDE 3
SLIDE 4 Some Chino Basin Stats Some Chino Basin Stats
- Area is about 220 square miles
Area is about 220 square miles
- Contains about 6.1 million acre
Contains about 6.1 million acre-
ft
Pumpers
– – 24 appropriators (cities, districts, etc) 24 appropriators (cities, districts, etc) – – ~ 300 overliers (mostly ag) ~ 300 overliers (mostly ag)
- Current pumping is about 180,000
Current pumping is about 180,000 acre acre-
ft/yr
SLIDE 5 Some Chino Basin Stats Some Chino Basin Stats
- Basin was adjudicated in 1978
Basin was adjudicated in 1978
- Watermaster governance is interest
Watermaster governance is interest-
based
– – Three pumper committees and an Three pumper committees and an advisory committees advisory committees – – Nine Nine-
member board
- Safe yield is managed at 140,000
Safe yield is managed at 140,000 acre acre-
ft/yr
SLIDE 6 Virgin Conditions (1905)
SLIDE 7 Water Level Decline (1933-2000)
Subsidence Area
SLIDE 8
SLIDE 9 Optimum Basin Management Optimum Basin Management Program (OBMP) Program (OBMP)
Court Ordered – – February 1998 February 1998
- OBMP was completed in August 1999
OBMP was completed in August 1999
“Peace Peace” ” Agreement that implements Agreement that implements the OBMP the OBMP – – July 2000 July 2000
OBMP Program EIR – – July 2000 July 2000
- Court Approval of OBMP and Peace
Court Approval of OBMP and Peace Agreement Agreement – – September 2000 September 2000
SLIDE 10 Optimum Basin Management Optimum Basin Management Program (OBMP) Program (OBMP)
- The OBMP in unprecedented in scope
The OBMP in unprecedented in scope
- Currently in the sixth year of
Currently in the sixth year of implementation implementation
- Various parties to the Peace Agreement are
Various parties to the Peace Agreement are implementing the OBMP implementing the OBMP
- Present Value Cost of OBMP
Present Value Cost of OBMP
– – Year 2000 Year 2000 – – over $400 million
– – Year 2006 Year 2006 – – TBD but substantially > $400 TBD but substantially > $400 million million
SLIDE 11 OBMP Contains Nine Major OBMP Contains Nine Major I nitiatives or Program I nitiatives or Program Elements Elements
- Comprehensive Groundwater Monitoring
Comprehensive Groundwater Monitoring – – PE 1 PE 1
- Comprehensive Recharge Program
Comprehensive Recharge Program – – PE 2 PE 2
- Water Supply Plan for Impaired Areas
Water Supply Plan for Impaired Areas – – PE 3 PE 3
- Subsidence Area Management Program
Subsidence Area Management Program – – PE 4 PE 4
- Regional Supplemental Water Program
Regional Supplemental Water Program – – PE 5 PE 5
- Cooperative Programs with Water Quality
Cooperative Programs with Water Quality Regulators Regulators – – PE PE-
6
Salt Management Program – – PE 7 PE 7
- Storage Management Program
Storage Management Program – – PE 8 PE 8
- Storage and Recovery Program
Storage and Recovery Program – – PE 9 PE 9
SLIDE 12 Three Major OBMP Three Major OBMP I nitiatives I nitiatives
Hydraulic Control
- Increasing storm water recharge ~
Increasing storm water recharge ~ 12,000 acre 12,000 acre-
ft/yr
- Increasing supplemental water
Increasing supplemental water recharge capacity recharge capacity
SLIDE 13
Hydraulic Control Hydraulic Control
SLIDE 14 Hydraulic Control Hydraulic Control
- Yield is maintained and enhanced by:
Yield is maintained and enhanced by:
– – Reducing groundwater discharge to the Reducing groundwater discharge to the Santa Ana River in its gaining reaches Santa Ana River in its gaining reaches – – Increasing groundwater recharge in the Increasing groundwater recharge in the Santa Ana River losing reaches Santa Ana River losing reaches – – And thus: And thus:
- Maintains existing yield of 140,000 acre
Maintains existing yield of 140,000 acre-
ft/yr
- Creates new yield of ~ 20,000 acre
Creates new yield of ~ 20,000 acre-
ft/yr
SLIDE 15 Hydraulic Control Hydraulic Control
- Hydraulic Control is achieved by:
Hydraulic Control is achieved by:
– – Constructing and operating new well Constructing and operating new well fields in southern, water quality fields in southern, water quality-
- degraded part of the Basin
degraded part of the Basin – – Managing supplemental water recharge Managing supplemental water recharge to reduce gradient towards the River to reduce gradient towards the River
SLIDE 16
SLIDE 17
I nsert Nitrate Map I nsert Nitrate Map
SLIDE 18
I nsert Nitrate Map I nsert Nitrate Map
SLIDE 19
I nsert TDS Map I nsert TDS Map
SLIDE 20
I nsert TDS Map I nsert TDS Map
SLIDE 21 Hydraulic Control Hydraulic Control
- Groundwater Treatment System:
Groundwater Treatment System:
– – Desalter I expansion from 8 to 14.2 mgd Desalter I expansion from 8 to 14.2 mgd – – New Desalter II New Desalter II – – 15 mgd 15 mgd – – Total cost for wells, pipelines and Total cost for wells, pipelines and treatment (RO and IX) > $100 million treatment (RO and IX) > $100 million – – Future expansions are being planned Future expansions are being planned
SLIDE 22
Desalter Well Location Desalter Well Location Map Map
SLIDE 23 Hydraulic Control Hydraulic Control
- Computer simulation results:
Computer simulation results:
– – Piezometric levels support increased Piezometric levels support increased recharge from Santa Ana River ~ 20,000 recharge from Santa Ana River ~ 20,000 acre acre-
ft/yr – – Piezometric levels maintained in Piezometric levels maintained in subsidence area subsidence area – – Piezometric level drops about: Piezometric level drops about:
- 20 to 50 feet in central part of the basin
20 to 50 feet in central part of the basin
- 25 feet near desalter wells
25 feet near desalter wells
- up to 75 feet in far north eastern part of the
up to 75 feet in far north eastern part of the basin basin
SLIDE 24 Hydraulic Control Hydraulic Control
- What would happen without hydraulic
What would happen without hydraulic control? control?
– – Discharge of 20 to 30 thousand acre Discharge of 20 to 30 thousand acre-
ft/yr of high TDS and nitrogen groundwater to River high TDS and nitrogen groundwater to River – – POTW POTW’ ’s would have to desalt some of their s would have to desalt some of their effluent and discharge to the River for effluent and discharge to the River for mitigation mitigation – – Purchase 20 to 30 thousand acre Purchase 20 to 30 thousand acre-
ft/yr of imported water to replace lost production imported water to replace lost production
SLIDE 25
New Storm Water New Storm Water Recharge Recharge
SLIDE 26 New Storm Water New Storm Water Recharge Recharge
- Prior to the OBMP, Watermaster had
Prior to the OBMP, Watermaster had completed a recon completed a recon-
level recharge master plan master plan
– – Utilized sophisticated models to estimate Utilized sophisticated models to estimate daily recharge for a 50 daily recharge for a 50-
year period – – Identified future potential for about Identified future potential for about 20,000 acre 20,000 acre-
ft/yr of new storm water recharge recharge
SLIDE 27 New Storm Water New Storm Water Recharge Recharge
- OBMP facilitated the completion of
OBMP facilitated the completion of the recharge master plan the recharge master plan
- Inland Empire Utilities Agency (IEUA)
Inland Empire Utilities Agency (IEUA) immediately implemented the immediately implemented the recharge master plan recharge master plan
- Construction finished in 2005
Construction finished in 2005
SLIDE 28
SLIDE 29 New Storm Water New Storm Water Recharge Recharge
- Construction of 3 new turnouts from the
Construction of 3 new turnouts from the MWD Rialto pipeline for supplemental water MWD Rialto pipeline for supplemental water recharge recharge
- Initial cost was $40 million
Initial cost was $40 million -
$10 million required to fine tune required to fine tune
- Estimated new yield based on the facilities
Estimated new yield based on the facilities constructed is about 12,000 acre constructed is about 12,000 acre-
ft/yr
SLIDE 30
New Supplemental Water New Supplemental Water Recharge Recharge
SLIDE 31
SLIDE 32 Supplemental Water Supplemental Water Recharge Recharge
- Existing SW recharge capacity is ~
Existing SW recharge capacity is ~ 50,000 to 60,000 acre 50,000 to 60,000 acre-
ft/yr
- Future replenishment demand is
Future replenishment demand is about 100,000 acre about 100,000 acre-
ft/yr
- MWDSC replenishment water is not
MWDSC replenishment water is not reliable reliable
- Future recharge capacity needs could
Future recharge capacity needs could exceed 140,000 acre exceed 140,000 acre-
ft/yr
SLIDE 33 New Recycled Water New Recycled Water Recharge Recharge
- IEUA is constructing a regional recycled
IEUA is constructing a regional recycled water distribution system water distribution system
- With new recharge basins,
With new recharge basins, IEUA/Watermaster IEUA/Watermaster could could recharge over recharge over 30,000 acre 30,000 acre-
ft/yr of recycled water
- New storm and imported water recharge
New storm and imported water recharge will be used for dilution to meet DHS and will be used for dilution to meet DHS and Basin Plan requirements Basin Plan requirements
SLIDE 34 Where Do We Go From Where Do We Go From Here? Here?
- Watermaster Parties and IEUA are
Watermaster Parties and IEUA are currently: currently:
– – Negotiating substantive changes to the Negotiating substantive changes to the Peace Agreement Peace Agreement – – Assessing the need for additional Assessing the need for additional desalting capacity desalting capacity
SLIDE 35 Where Do We Go From Where Do We Go From Here? Here?
- Watermaster, IEUA and others will
Watermaster, IEUA and others will start: start:
– – Planning the next phase of supplemental Planning the next phase of supplemental water recharge projects water recharge projects – – Planning the next phase of groundwater Planning the next phase of groundwater storage projects storage projects
SLIDE 36
What Makes the OBMP Work? Work?
SLIDE 37 What Makes the OBMP What Makes the OBMP Work? Work?
- Committed Watermaster Parties
Committed Watermaster Parties – – agency managers, elected officials agency managers, elected officials and private pumpers and private pumpers
- Regional leadership of the IEUA,
Regional leadership of the IEUA, TWMWD, WMWD and SAWPA TWMWD, WMWD and SAWPA
SLIDE 38 What Makes the OBMP What Makes the OBMP Work? Work?
- Support/direction from the Regional
Support/direction from the Regional Board, DWR and other state agencies Board, DWR and other state agencies
- Support from state legislators and
Support from state legislators and congressional representatives congressional representatives
SLIDE 39
Questions? Questions?
SLIDE 40
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