Kevin M. Stewart

Development and Implementation of an Optimization Model for Hydropower and Total Dissolved Gas in the Mid-Columbia River System

AbstractManaging energy, water, and environmental priorities and constraints within a cascade hydropower system is a challenging multiobjective optimization effort that requires advanced modeling a...

The Economic Benefits of Multipurpose Reservoirs in the United States-Federal Hydropower Fleet

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Water Quality Projects Summary for the Mid-Columbia and Cumberland River Systems

................................................................................................................................................. x 1. BACKGROUND AND INTRODUCTION ........................................................................................... 1 2. MID-COLUMBIA RIVER SYSTEM .................................................................................................... 1 2.1 TDG UPTAKE PREDICTION DEVELOPMENT ..................................................................... 3 2.1.1 METHODOLOGY ........................................................................................................ 3 VALIDATION AND PERFORMANCE ....................................................................... 4 2.1.2 4 2.2 IMPLEMENTATION OF TAILRACE TDG DEVELOPMENT INTO RIVERWARE ............ 6 2.2.1 OVERVIEW OF MID-COLUMBIA OPTIMIZATION MODEL ................................ 6 2.2.2 RIVERWARE’S TDG METHODS ............................................................................... 6 2.2.3 PRIEST RAPIDS TAILRACE TDG OPTIMIZATION................................................ 6 2.2.4 SIGNIFICANCE OF RESULTS ................................................................................... 8 2.3 TDG TRANSFER PREDICTION ............................................................................................... 9 2.3.1 METHODOLOGY ........................................................................................................ 9 2.3.2 VALIDATION AND PERFORMANCE ..................................................................... 11 2.3.3 FUTURE WORK FOR TDG TRANSFER ................................................................. 14 3. CUMBERLAND RIVER SYSTEM .................................................................................................... 16 3.1 DECISION SUPPORT SYSTEM DEVELOPMENT ............................................................... 16 3.1.1 OVERVIEW ................................................................................................................ 17 3.1.2 METHODOLOGY ...................................................................................................... 17 3.2 IMPLEMENTATION OF DECISION SUPPORT SYSTEM ................................................... 18 3.2.1 CE-QUAL-W2 ............................................................................................................. 18 3.2.2 NONLINEAR AUTOREGRESSIVE NETWORK (NARX) MODEL ....................... 19 3.3 DECISION SUPPORT SYSTEM OPTIMIZATION ................................................................ 21 3.3.1 OLD HICKORY AND CORDELL HULL OPTIMIZATION RESULTS .................. 22 4. CONCLUSION .................................................................................................................................... 24 5. REFERENCES ..................................................................................................................................... 25

Predicting Total Dissolved Gas Travel Time in Hydropower Reservoirs

AbstractLarge spills at hydropower facilities can produce environmentally unfavorable supersaturated total dissolved gas (TDG) conditions. Enhanced coordination between adjacent hydropower faciliti...

Total dissolved gas prediction and optimization in RiverWare

................................................................................................................................................ ix 1. BACKGROUND AND INTRODUCTION ........................................................................................... 1 2. METHODOLOGY ................................................................................................................................. 4 2.1 TDG PREDICTION ..................................................................................................................... 5 2.2 DATA PROCESSING AND ASSUMPTIONS ........................................................................... 7 2.2.1 Data Collection and Preliminary Filtering ..................................................................... 7 2.2.2 Project Specific Data Filtering and Assumptions .......................................................... 9 2.3 CALIBRATION AND VALIDATION ....................................................................................... 9 2.4 RESULTS .................................................................................................................................. 11 2.5 RIVERWARE OPTIMIZATION .............................................................................................. 22 3. FUTURE WORK ................................................................................................................................. 24 4. CONCLUSION .................................................................................................................................... 25 5. REFERENCES ..................................................................................................................................... 26