Decision Support Kevin Werner Service Coordination Hydrologist Colorado Basin RFC CBRFC Stakeholder Workshop.

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Presentation transcript:

Decision Support Kevin Werner Service Coordination Hydrologist Colorado Basin RFC CBRFC Stakeholder Workshop

Forecast precip / temp Weather and Climate Forecasts River Forecast System parameters Observed Data Analysis & Quality Control Calibration model guidance Hydrologic Model Analysis hydrologic expertise & judgment Outputs Graphics River Forecasts Decisions Rules, values, other factors, politics Forecast Process

CBRFC Research Needs 1. Improve precipitation analysis 2. Improve use of weather and climate forecasts 3. Develop reliable ensemble forecast system 4. Improve physical process understanding and modeling 5. Decision Support: Work with stakeholders to use forecasts

Previous Research on decision support in the water sector Forecasts generally not used. Water management agencies value reliability and quality above all else. Unless those are threatened, agencies have little incentive to use forecasts. Forecast use correlates with perceived risk. Forecast usage not dependent on agency size or on understanding of forecast skill and reliability. Policy and infrastructure in USA limit use of forecasts. Many operating decisions are tied to observed data and do not allow flexibility. Hopeless? No! Long term drought, increasing demands, and climate change projections for less water each present opportunities for increasing forecast usage. 4 StudyMethod(s)Geographic Area(s) (Rayner et al., 2005)Field Research: Semi- structured Interviews USA: Pacific Northwest, Southern California, and Washington, DC (O'Connor et al., 2005)SurveyUSA: South Carolina and Susquehanna River Basin of Pennsylvania (Lemos, 2008)Field Research: Observation of Meetings USA and Brazil (Dow et al., 2007)Survey (building on earlier work (O'Connor et al., 2005)) USA: South Carolina and Susquehanna River Basin of Pennsylvania (Callahan & Miles, 1999)Field Research: Semi- structured interviews USA: Pacific Northwest (Ziervogel et al., 2010)Case StudySouth Africa (Pulwarty & Redmond, 1997) Field Research: Semi- structured interviews USA: Pacific Northwest

Colorado River Supply and Demand Credit: USBR

CBRFC Partnerships 6

Example: Denver Water Application RFC ESP Forecasts Reservoir Management Credit: Bob Steger, Denver Water

Example: Lake Powell Forecast

Lake Powell Probability of Equalization Forecast Background: Drought conditions in the Colorado Basin severely stressed water supplies In 2007, the USBR in consultation with the seven basin states adopted an interim operating agreement in affect until 2026 that defines how water shortages and surplus will be allocated to the basin states. Allocations are determined by lake elevation triggers. In many cases, these triggers are based on forecasts. Stakeholders requested forecasts for probabilities of triggering various actions. In 2009, CBRFC and USBR developed a forecast of the chance that Lake Powell will reach the equalization level by the end of the water year. Somewhat different from the chance that April 1 forecast will forecast the same.

After October the water year to date observed volume is include in all numbers This is the forecast of the chance that Lake Powell will reach the equalization level by the end of the water year – not the chance that equalization will be triggered.

Toolkit for User Engagement Previous efforts: Forecast verification – Large workshop in Boulder, CO in 2008 with hands on lab exercises and presentations (collaboration with WWA) Soil moisture – Focus group workshop in Tucson, AZ in 2009 with specific questions and social science techniques (collaboration with CLIMAS) Goal: Develop a systematic workshop to gauge forecast usage, potential usage, and Engaged with WWA (Kristen Averyt) and CLIMAS (Gigi Owen) to develop toolkit Dry run at CBRFC in March 2010 First toolkit workshop April 2010 in Grand Junction, CO Follow on workshops in Utah and SE USA.

WWA Funding: July 2009–onward Leveraged Funding: NOAA NWS CBRFC NWS River Forecast Center Climate Literacy and Information Use Survey (Pre- and Post-Workshop) Computer-based usability evaluation Scenario Exercises Used to evaluate how the tool might be used & what information people use to make decisions April 23, 2010: Grand Junction, CO Introduce and evaluate the new national Water Resource Outlook web-based tool developed by the CBRFC

Working with NOAA West… Deliver a broader suite of improved water services to support management of the Nation’s Water Supply

Summary RFCs develop and maintain a real time hydrologic modeling and forecasting environment to support water related decisions nation wide RFCs are looking more to provide water resources decision support We’re looking to work with groups like yours to develop these concepts and prototype services

Wrap up from this meeting Action Items….

Kevin Werner CBRFC Service Coordination Hydrologist Phone: