Business as Unusual Leveraging the Water Supply Planning Process to Create Economic Opportunity, Enhance Environmental Integrity and Increase Regulatory.

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Presentation transcript:

Business as Unusual Leveraging the Water Supply Planning Process to Create Economic Opportunity, Enhance Environmental Integrity and Increase Regulatory Certainty

What We Do  Gather and synthesize state-wide water supply plan data: Needs (drinking, agricultural, industrial)Needs (drinking, agricultural, industrial) Existing Sources (lakes, streams, wells, springs)Existing Sources (lakes, streams, wells, springs) Proposed Supplementary SourcesProposed Supplementary Sources  Evaluate the cumulative impacts of projected water withdrawals, discharges, diversions and impoundments on: Off-stream uses: existing permits, grandfathered usesOff-stream uses: existing permits, grandfathered uses Instream uses: aquatic life, assimilative capacity, physical properties, chemical propertiesInstream uses: aquatic life, assimilative capacity, physical properties, chemical properties Downstream withdrawals/dischargesDownstream withdrawals/discharges

Why Do We Do It?  Increase certainty (decrease uncertainty)  Enhance Environmental Integrity  Create economic opportunity  In general, we want to move beyond: Overestimate of demand as the only MOSOverestimate of demand as the only MOS Lack of information about upstream changes, and downstream effectsLack of information about upstream changes, and downstream effects Narrow range of alternatives due to cost of alternatives evaluationNarrow range of alternatives due to cost of alternatives evaluation Quantity and Quality un-relatedQuantity and Quality un-related

(Un)Certainty and Economics  Water availability influences growth  Budgetary constraints influence our ability to monitor, and therefore, model and make decisions  Rational versus adaptive expectations – water supply plans Water Supply Planning horizon is 30 years, updated every 5 yearsWater Supply Planning horizon is 30 years, updated every 5 years  Regulatory uncertainty makes planning more costly

What We Do: Modeling Surface water flows  Quantity Annual InflowsAnnual Inflows  Timing Daily, monthly, seasonal inflowDaily, monthly, seasonal inflow  Storage Reservoir storage available (crucial!)Reservoir storage available (crucial!)  Drought Response

How We Do It: Decision Support System  An integrated “meta-modeling” and data analysis system  Provides Integrated Data Acquisition, Analysis, and Modeling Connect to web-based data sources with automated retrievalConnect to web-based data sources with automated retrieval Utilize internal DEQ databases, such as VPDES and VWUDSUtilize internal DEQ databases, such as VPDES and VWUDS Integrate data with hydrologic modeling software for long- term impact analysis and short-term predictionIntegrate data with hydrologic modeling software for long- term impact analysis and short-term prediction  How: Leverage Existing Web-Based Data SourcesLeverage Existing Web-Based Data Sources Make in-house data sources web accessibleMake in-house data sources web accessible OO System for integration of models and dataOO System for integration of models and data Continually update model with recent permit decisionsContinually update model with recent permit decisions  Status: All permits issued/reissued since Spring 2009 in state-wide model (17)All permits issued/reissued since Spring 2009 in state-wide model (17) Approved WS Plans being programmed into modeling system as of Summer 2010Approved WS Plans being programmed into modeling system as of Summer 2010

Ecological Health Modeling System  Lack of comprehensive Flow-ecology model increases regulatory uncertainty  Main Drivers of Ecological Health: 1.Native/Naturalized Community (stream class/location dependent) 2.Extent of detrimental flow alteration 3.Water Quality  Without knowing all three of the above, we face greater (sometimes unacceptable) uncertainty  Construction of state-wide “Flow-ecology” model in the works Ecological Health Water Quality Stream Class Flow Alteration Ecology = f(Quality ) Ecology = f (Flow) Community = f (Class)

Drought Response and Conservation  Drought Response – decreasing non- essential demands during drought increases certainty for essential demands  Conservation – Increasing efficiency of essential uses during non-drought times increases availability of water for all users (including in-stream resources)

Questions that we can ask …  Are there alternatives in water supply plans that are preferable?  How will future land use build-out affect downstream water supplies (availability, timing, cost of treatment)?  If temperature and precipitation patterns change, what happens?  What are the effects of all of these things on: aquatic life, recreation, water quality?  What effect will drought restrictions have? (by use type, and season?)  Does a water allocation upstream affect dilution/DO/temperature downstream?  All of these in terms of: availability, aquatic life, recreation, and quality.

Perceived Data/Analysis Gaps  Extent of grandfathered water use  Inter-basin transfers (within a system)  VPDES data for withdrawals  The limits of conservation ordinances and low- hanging fruit  Understanding historical surface and groundwater use impacts on stream flows  The magnitude of agricultural water use  The consumptive nature of all uses  Impact of groundwater withdrawals on base flows (short term and long term)  Flow-ecology relationships need to be fleshed out state-wide (under way)