Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Jim Verdin U.S. Geological Survey NIDIS Program Office NOAA Earth System Research Laboratory.

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Presentation transcript:

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Jim Verdin U.S. Geological Survey NIDIS Program Office NOAA Earth System Research Laboratory Boulder, Colorado National Integrated Drought Information System (NIDIS) Upper Colorado River Basin Pilot

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Federal Participants  NOAA, NWS, WR, ESRL; USGS GCMRC & WY WSC; USBR; USACE; NPS; USFS Three categories of drought information users & Two scales of analysis  Large reservoir operations and triggers (full basin scale)  Water supply managers with a stake in trans-basin diversions (sub- basin scale, Colorado River above Kremmling CO)  Ecosystem health and services, including recreation and tourism (sub- basin scale, Colorado River above Kremmling CO) Pilot Implementation Upper Colorado River Basin: Federal Planning Meeting: Salt Lake City UT, May 2008

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Pilot Implementation Upper Colorado River Basin: Kremmling Lake Powell Lake Mead

Drought Index Project Planning Workshop Boulder, August 18-19, 2009  National Center for Atmospheric Research (NCAR)  National Drought Mitigation Center (NDMC)  USDA: Natural Resources Conservation Service  USFS: Region 2  USBR: Eastern Colorado Area Office, Great Plains Region, Office of Policy and Programs, Research and Development  USGS: Colorado Water Science Center, Central Region, Grand Canyon Monitoring and Research Center  NOAA: Earth System Research Laboratory, National Centers for Environmental Prediction, National Climatic Data Center, National Weather Service Pilot Implementation Upper Colorado River Basin: Scoping Workshop for the Upper Colorado River Basin Pilot, NIDIS, Boulder CO, October 2008 Explore existing mandates, decision cycles, and organizational capacities to determine a team to implement the pilot  Colorado Division of Water Resources (CDWR)  Colorado State Climatologist  Colorado River Water Conservation District (CRWCD)  Colorado Water Conservation Board (CWCB)  CU – Western Water Assessment, CIRES, and CADSWES  Denver Water Board  Northern Colorado Water Conservancy District (NCWCD)  Wyoming State Engineer  Wyoming State Climatologist  Utah State Climatologist  Desert Research Institute/WRCC

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Pilot Implementation Upper Colorado River Basin: Year One: Actions from the Scoping Workshop for the Upper Colorado River Basin NIDIS Pilot Inventory and assessment of drought indicators and triggers presently used in the UCRB Build a UCRB community on the NIDIS Drought Portal ( Facilitate access to indicator and trigger observational data and information products via the UCRB community on the NIDIS Drought Portal Perform a monitoring networks gap analysis for the UCRB Begin efforts to develop an Upper Colorado basin-specific drought monitor (including interbasin transfer locations and ecosystem impacts)

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Indicators & Triggers assessment Interview water managers Provide recommendations for enhanced monitoring Coordinate with state climatologists in UT and WY Identify target products for basin drought monitor Drought impacts assessment Pilot Implementation Upper Colorado River Basin: Nolan Doesken, Colorado State Climatologist

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Existing drought monitoring practices: Where are we today?  Indicators & Triggers for decision makers Gaps in our understanding of drought: Past, present and future  Are we making good use of what measurements we already have? Gaps in current observational networks (e.g., stream gaging, wx obs, SNOTEL, soil moisture, reservoir levels)  What is the status of these networks?  What are the measurement gaps? Gaps in analytical products and tools  “Where does the snow go?” Evapotranspiration, sublimation & soil moisture products Gaps in knowledge of water use  Water demand and use Pilot Implementation Upper Colorado River Basin: Monitoring Gaps Analysis

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Use what we’ve learned in Year One to initiate the Colorado Basin Drought Monitor Establish network for ongoing briefings on impacts and projections across climate timescales (UCRB Drought Monitor) Develop decision support tools for seasonal demand projections and review of triggering criteria Feedback into Colorado Basin Drought Monitor and Portal, Early Warning System maintenance and transfer Pilot Implementation Upper Colorado River Basin: Year Two Actions -Mead-2007.html

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Prototyping: Given better data and information coordination, would responses have been improved for past events? Assess: Value of improved information using past conditions Responses for projections / scenarios (decadal, climate change) Feedback on priorities (e.g. data gaps) to Executive Council Pilot Implementation Upper Colorado River Basin: Year Two Actions

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Pilot Implementation Upper Colorado River Basin: Interdisciplinary Research and Applications Enhancements to Water Supply Forecasting Integrate CPC objective climate forecasts into RFC Ensemble Streamflow Predictions (ESP) Introduce time-varying potential evapotranspiration into ESP water supply forecasts Develop USBR operations management model that can make use of ESP continuous, probabilistic forecast to reckon chance of hitting EIS trigger points, as alternative to single value water supply forecasts

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Analysis of the UCRB water demand: Characteristics, spatial patterns & assessment of potential vulnerabilities Phase 1:  UCRB water demand data assessment  Conduct data inventory and develop a comprehensive database of past and present water demand  Identify spatial, temporal and qualitative data gaps Phase 2:  Choose an appropriate case study area  Using GIS, classify water consumption per sector, types of uses, etc.  Analyze spatial and temporal patterns in water demand  Identify consumption patterns by sector  Identify potential vulnerabilities due to competitive water demand Pilot Implementation Upper Colorado River Basin: Interdisciplinary Research and Applications

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Reconciling Projections of 21 st Century Colorado River Stream Flow Recent papers describe mid-century reductions in flow from 5-45% Need for examining the wide range of predictions, to better meet information needs of planners and decision makers Four cooperating RISAs: WWA, CAP, CLIMAS, and CIG Year 2, progress so far includes: downscaling GCM precipitation and temperature, analyses of model (VIC, NOAH, SAC) runoff elasticity and sensitivity, examination of high elevation feedback, stakeholder workshop (Las Vegas, November 2008) Pilot Implementation Upper Colorado River Basin: Interdisciplinary Research and Applications

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Pilot Implementation Upper Colorado River Basin: Interdisciplinary Research and Applications – Recent published results “…one initial critical finding is that meaningful predictions for the southwestern United States need to account for the highly variable topography and associated changes in climate and hydrology of the Rockies...” Hoerling et al., 2009, Southwest Hydrology “…the models show similar sensitivity of streamflow to precipitation changes, with a 2:1 ratio of percent change in flow to percent change in precipitation using historic data. Hence, a 10 percent reduction in precipitation would result in a 20 percent decline in runoff in the Upper Colorado.”

Drought Index Project Planning Workshop Boulder, August 18-19, 2009 Thank you!