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Home My WebLink About03_BRBM_Hydrologics_10_07_2010Advancing the management of water resourcesColumbia, MD Raleigh, NC Portland, OR Boston, MABrian J. McCrodden, P.E.Steven Nebiker, P.E.Casey Caldwell, E.I.TBroad Hydrologic ModelKickoff MeetingOctober 7, 2010 Who and What is HydroLogics?12 people, 4 statesIn business since 1985Specialties: hydrology, modeling, systems analysis, operations research Developers of OASISServices:Water allocation/conflict resolutionRisk/drought managementWater supply planningSystem operationswww.hydrologics.net Small Firm – Broad Reach What is OASIS?A patented, mass balance, water resources simulation/optimization modelRuns quickly on a long-term hydrologic recordCan model virtually any flow prescription or operating policyUses real-time forecasts for probabilistic operationsSame model for: Alternatives evaluation (planning) Real-time operations Gaming Model InputTime series of unregulated inflows Time series of net evaporation Physical data (reservoir SAE, turbine characteristics, channel capacities, etc.)Operating Policies, e.g.Rule curvesMinimum releases/ecological flowsDrought and flood management policiesEnergy requirements Model OutputTables and Graphs ofFlowElevation, andDerived attributes, e.g.habitat availability, energy, revenue, water supply shortages, recreation daysfor every time stepat every point in the system Alternatives EvaluationA major purpose of OASIS is to compare alternatives. That is, to compare the performance of alternative sets of facilities, demands, and operating policiesover the whole range of the hydrologic record. Concept of Broad Hydrologic ModelA basinwide model of the Broad River Basin at the finest practical geographic resolution and timestep. Concept of Broad Hydrologic ModelA basinwide model of the Broad River Basin at the finest practical geographic resolution and timestep.Possible Uses:1. Evaluation of the combined effects of municipal water supply plans2. Evaluation of interbasin transfer permit applications3. Development of individual water supply plans –model will be on the DWR server and available to stakeholders and their consultants4. A platform for developing risk-based drought plans. Preliminary Model Schematic Upper Basin Middle/Lower Basin DataMajority of data to be collected by Moffatt & Nichol (see upcoming slides)HydroLogics responsible for collecting data on streamflows, reservoir operations, and system interconnections Data CollectionPrecipitation Gage Records (NOAA)Agricultural Water UseCrop Cover and Livestock StatisticsRecent Trends - Irrigation Rates & Groundwater vs Surface waterMunicipal and Industrial WithdrawalsGreater than 100,000 gpdMunicipal and Industrial DischargesGreater than 100,000 gpdCensus Data Data SourcesMunicipal & Industrial WithdrawalsDWRWater UsersWastewater Discharges (NPDES)DWQDischargersAgricultural Water UseNational Agricultural Statistics Service (NASS)Ag Statistics from NC Dept. of Agriculture (NCDA)Ag Extension Agents and Questionnaire Municipal & Industrial Data AnalysisWithdrawals & Discharges1930s to 2008Monthly Time SeriesFill Gaps in SeriesLinear Interpolation – Census DataUser Records of Facility Start/Stop Dates Agricultural Data AnalysisCrop Acreage & Livestock HeadAg Census data from NASS & NCDA (by County)Distribute Ag in Basin with Ext AgentsAgricultural Water UseDetermine ET Rates/Crop Water RequirementsSubtract Demands from Weekly RainfallMake up Difference with IrrigationDaily Time Series of Weekly ValuesBack to 1930s We Need Your HelpWithdrawals & DischargesKey Contacts at FacilitiesIntake/Discharge RecordsFacility Stop/Start DatesAgricultural Water UseVerification of Ag StatisticsGeographic Distribution of Ag Water Use (Questionnaire) Project TimelineTwo-year timeline, but …ComponentsBasin schematic: 1 - 2 monthsData collection (demands and discharges, including agricultural demands): 4 - 6 monthsInflow development: 6 – 10 monthsVerificationOperating rules: 3 monthsCurrent and future demand model runs: 2 - 4 monthsDocumentation and training: 1 monthExpected completion date: March 2012Accelerated timeline for preliminary modeling results (and drought forecasts): 6 months Questions?