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Title: Complex relationship between seasonal streamflow forecast skill and value in reservoir operations

Journal Article · · Hydrology and Earth System Sciences (Online)
 [1]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Singapore Univ. of Technology and Design (Singapore). SUTD-MIT International Design Centre
  2. CSIRO, Melbourne, Clayton, Vic (Australia); Univ. of Tasmania, Hobart, TAS (Australia). Inst. for Marine and Antarctic Studies
  3. CSIRO, Melbourne, Clayton, Vic (Australia)
  4. Singapore Univ. of Technology and Design (Singapore). Pillar of Engineering Systems and Design

Considerable research effort has recently been directed at improving and operationalising ensemble seasonal streamflow forecasts. Whilst this creates new opportunities for improving the performance of water resources systems, there may also be associated risks. Here, we explore these potential risks by examining the sensitivity of forecast value (improvement in system performance brought about by adopting forecasts) to changes in the forecast skill for a range of hypothetical reservoir designs with contrasting operating objectives. Forecast-informed operations are simulated using rolling horizon, adaptive control and then benchmarked against optimised control rules to assess performance improvements. Results show that there exists a strong relationship between forecast skill and value for systems operated to maintain a target water level. But this relationship breaks down when the reservoir is operated to satisfy a target demand for water; good forecast accuracy does not necessarily translate into performance improvement. We show that the primary cause of this behaviour is the buffering role played by storage in water supply reservoirs, which renders the forecast superfluous for long periods of the operation. System performance depends primarily on forecast accuracy when critical decisions are made – namely during severe drought. As it is not possible to know in advance if a forecast will perform well at such moments, we advocate measuring the consistency of forecast performance, through bootstrap resampling, to indicate potential usefulness in storage operations. Our results highlight the need for sensitivity assessment in value-of-forecast studies involving reservoirs with supply objectives.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830; IDG 21400101
OSTI ID:
1398219
Report Number(s):
PNNL-SA-126975
Journal Information:
Hydrology and Earth System Sciences (Online), Vol. 21, Issue 9; ISSN 1607-7938
Publisher:
European Geosciences Union (EGU)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 82 works
Citation information provided by
Web of Science

References (57)

The future of water resources systems analysis: Toward a scientific framework for sustainable water management: THE FUTURE OF WATER RESOURCES SYSTEMS ANALYSIS journal August 2015
Value of Seasonal Flow Forecasts in Bayesian Stochastic Programming journal November 1997
Reliable long-range ensemble streamflow forecasts: Combining calibrated climate forecasts with a conceptual runoff model and a staged error model: LONG-RANGE ENSEMBLE STREAMFLOW FORECASTS journal October 2016
Optimal Hedging and Carryover Storage Value journal January 2004
Statistical calibration and bridging of ECMWF System4 outputs for forecasting seasonal precipitation over China: FORECASTING SEASONAL PRECIPITATION journal June 2014
Intra-seasonal drivers of extreme heat over Australia in observations and POAMA-2 journal December 2013
Economic Value of Long-Lead Streamflow Forecasts for Columbia River Hydropower journal March 2002
Providing Seasonal-to-Interannual Climate Information for Risk Management and Decision-making journal January 2010
Monthly versus daily water balance models in simulating monthly runoff journal July 2011
Tailoring seasonal climate forecasts for hydropower operations journal January 2011
Regime-shifting streamflow processes: Implications for water supply reservoir operations: REGIME-SHIFTING STREAMFLOW AND WATER RESERVOIR OPERATIONS journal May 2016
Constrained model predictive control: Stability and optimality journal June 2000
The End of Reliability journal March 2010
Strictly Proper Scoring Rules, Prediction, and Estimation journal March 2007
Tree-based reinforcement learning for optimal water reservoir operation: FITTED journal September 2010
A strategy to overcome adverse effects of autoregressive updating of streamflow forecasts journal January 2015
Ensemble forecasts of monthly catchment rainfall out to long lead times by post-processing coupled general circulation model output journal November 2014
Seasonal Forecasts of Australian Rainfall through Calibration and Bridging of Coupled GCM Outputs journal May 2014
Value of long-term streamflow forecasts to reservoir operations for water supply in snow-dominated river catchments: VALUE OF LONG-TERM FORECASTS TO RESERVOIR OPERATIONS journal June 2016
Limited multi-stage stochastic programming for managing water supply systems journal March 2013
Joint and respective effects of long- and short-term forecast uncertainties on reservoir operations journal September 2014
Water: Megacities running dry in Brazil journal May 2015
Effect of streamflow forecast uncertainty on real-time reservoir operation journal April 2011
Western U.S. Water Supply Forecasting: A Tradition Evolves journal January 2014
Improving Intraseasonal Prediction with a New Ensemble Generation Strategy journal December 2013
Value of adaptive water resources management in Northern California under climatic variability and change: Reservoir management journal January 2012
Streamflow decline in southwestern Australia, 1950-2008: STREAMFLOW DECLINE journal June 2010
Short-term optimal operation of water systems using ensemble forecasts journal September 2014
Weather Forecasts are for Wimps: Why Water Resource Managers Do Not Use Climate Forecasts journal April 2005
Stochastic dynamic programming models for reservoir operation optimization journal November 1984
Hydro-economic assessment of hydrological forecasting systems journal January 2012
Dynamic Programming and Lagrange Multipliers journal October 1956
Modeling the Evolution of Demand Forecasts ith Application to Safety Stock Analysis in Production/Distribution Systems journal May 1994
Reservoir optimization using sampling SDP with ensemble streamflow prediction (ESP) forecasts journal August 2001
A review on climate-model-based seasonal hydrologic forecasting: physical understanding and system development: A review on climate-model-based seasonal hydrologic forecasting journal May 2015
Scenario tree reduction in stochastic programming with recourse for hydropower operations: SCENARIO TREE REDUCTION IN STOCHASTIC PROGRAMMING journal August 2015
High-resolution projections of surface water availability for Tasmania, Australia journal January 2012
Toward Understanding the Value of Climate Information for Multiobjective Reservoir Management under Present and Future Climate and Demand Scenarios journal April 2010
Error reduction and representation in stages (ERRIS) in hydrological modelling for ensemble streamflow forecasting journal January 2016
Drought and Desalination: Melbourne water supply and development choices in the twenty-first century journal August 2014
A Simple Framework for Incorporating Seasonal Streamflow Forecasts into Existing Water Resource Management Practices 1 : A S journal April 2010
Water supply sensitivity to climate change: An R package for implementing reservoir storage analysis in global and regional impact studies journal February 2016
Multisite probabilistic forecasting of seasonal flows for streams with zero value occurrences: MULTISITE PROBABILISTIC FORECASTING OF STREAMS journal February 2011
High-quality spatial climate data-sets for Australia journal December 2009
Technical Note: Initial assessment of a multi-method approach to spring-flood forecasting in Sweden journal January 2016
A log-sinh transformation for data normalization and variance stabilization: A LOG-SINH TRANSFORMATION journal May 2012
Decision Support System for Optimizing Reservoir Operations Using Ensemble Streamflow Predictions journal January 2011
Accounting for seasonal dependence in hydrological model errors and prediction uncertainty: Seasonal Dependence of Model Error Structure journal September 2013
The Millennium Drought in southeast Australia (2001-2009): Natural and human causes and implications for water resources, ecosystems, economy, and society: CAUSES AND IMPACTS OF AUSTRALIA'S RECORD DROUGHT journal February 2013
Assessment of an ensemble seasonal streamflow forecasting system for Australia journal January 2017
High-resolution projections of surface water availability for Tasmania, Australia posted_content February 2012
Providing Seasonal-to-Interannual Climate Information for Risk Management and Decision-making text January 2010
Error reduction and representation in stages (ERRIS) in hydrological modelling for ensemble streamflow forecasting posted_content January 2016
Improved regional water management utilizing climate forecasts: An interbasin transfer model with a risk management framework journal August 2014
Limited multi-stage stochastic programming for managing water supply systems journal March 2013
Water: Megacities running dry in Brazil journal May 2015
Providing Seasonal-to-Interannual Climate Information for Risk Management and Decision-making text January 2010

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Assessment of an ensemble seasonal streamflow forecasting system for Australia journal January 2017
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