Chino Basin Optimum Chino Basin Optimum Basin Management Basin Management Program Program February 6, 2006 February 6, 2006
We will talk about We will talk about � Chino Basin Basics Chino Basin Basics � � Yield Maintenance/Enhancement Yield Maintenance/Enhancement � � New stormwater recharge New stormwater recharge � � Supplemental Water Recharge Supplemental Water Recharge � � Where We Go From Here Where We Go From Here �
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 ft � � Pumpers 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- -ft/yr ft/yr acre
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 based – Three pumper committees and an Three pumper committees and an – advisory committees advisory committees – Nine Nine- -member board member board – � Safe yield is managed at 140,000 Safe yield is managed at 140,000 � acre- -ft/yr ft/yr acre
Virgin Conditions (1905)
Water Level Decline (1933-2000) Subsidence Area
Optimum Basin Management Optimum Basin Management Program (OBMP) Program (OBMP) � Court Ordered 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 – – July 2000 July 2000 the OBMP � OBMP Program EIR OBMP Program EIR – – July 2000 July 2000 � � Court Approval of OBMP and Peace Court Approval of OBMP and Peace � Agreement – – September 2000 September 2000 Agreement
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 over $400 million – – Year 2006 Year 2006 – – TBD but substantially > $400 TBD but substantially > $400 – million million
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 – – PE PE- -6 6 Regulators � Salt Management Program 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 �
Three Major OBMP Three Major OBMP I nitiatives I nitiatives � Hydraulic Control Hydraulic Control � � Increasing storm water recharge ~ Increasing storm water recharge ~ � 12,000 acre- -ft/yr ft/yr 12,000 acre � Increasing supplemental water Increasing supplemental water � recharge capacity recharge capacity
Hydraulic Control Hydraulic Control
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 ft/yr � � Creates new yield of ~ 20,000 acre Creates new yield of ~ 20,000 acre- -ft/yr ft/yr �
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
I nsert Nitrate Map I nsert Nitrate Map
I nsert Nitrate Map I nsert Nitrate Map
I nsert TDS Map I nsert TDS Map
I nsert TDS Map I nsert TDS Map
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 –
Desalter Well Location Desalter Well Location Map Map
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- -ft/yr ft/yr acre – 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
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 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 ft/yr of – imported water to replace lost production imported water to replace lost production
New Storm Water New Storm Water Recharge Recharge
New Storm Water New Storm Water Recharge Recharge � Prior to the OBMP, Watermaster had Prior to the OBMP, Watermaster had � completed a recon- -level recharge level recharge completed a recon master plan master plan – Utilized sophisticated models to estimate Utilized sophisticated models to estimate – daily recharge for a 50- -year period year period daily recharge for a 50 – Identified future potential for about Identified future potential for about – 20,000 acre- -ft/yr of new storm water ft/yr of new storm water 20,000 acre recharge recharge
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 �
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 $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- -ft/yr ft/yr constructed is about 12,000 acre
New Supplemental Water New Supplemental Water Recharge Recharge
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