US Army Corps of Engineers BUILDING STRONG ® Reservoir Simulation Software “Westfield...
-
Upload
arleen-barnett -
Category
Documents
-
view
214 -
download
1
Transcript of US Army Corps of Engineers BUILDING STRONG ® Reservoir Simulation Software “Westfield...
US Army Corps of Engineers
BUILDING STRONG®
Reservoir Simulation Software“Westfield Sub-basin”
Presenter –
John Hickey, HEC
August 2010
BUILDING STRONG®
HEC-ResSim
• Simulate the influence of reservoirs and diversions on flows in a river system.
• Decisions about reservoir releases are made in accordance with user-defined rules.
BUILDING STRONG®
Connecticut River Basin
44 Sub-basins 60+ Large Reservoirs 143 Ecological points of
interest 320+ SYE inflow
hydrographs 362 River Reaches
BUILDING STRONG®
Westfield Subbasin - Case Study• Multi-purpose operations (flood management,
hydropower, water supply)• Varied ecological concerns (floodplains, salmon
stocking, diadromous fish)Also…• Availability of
hydrologic data• One of first
subbasins to have working simulation and optimization models
BUILDING STRONG®
Reservoirs on the Westfield• The Westfield consists of three major
dams essentially running in parallel. Knightville Littleville Cobble Mountain/Borden Brook
• Flood management, hydropower, and water supply objectives are prevalent within the sub basin Knightville – Flood Management Littleville – Flood Management Cobble Mountain/Borden Brook –
Hydropower and water supply
BUILDING STRONG®
Physical Information for Model
• Physical Components:
Reservoir Pool
Dam (and its Outlets)
Diverted Outlets
• Hierarchical Outlet Structure
• Multiple outlet types
• Diverted Outlets
• Hydropower Outlets
Capacity
Efficiency
BUILDING STRONG®
Operational Rule Blocks• Priority based
• Rules at the Dam
• Rules for downstream locations
• Rules on individual outlets
• Rules for other locations
• Various types of rules
Min/Max release
Rate of Change
Downstream Control
Hydropower
Scripting
BUILDING STRONG®
At Site Operations• Knightville Dam: max
flood release of 4,500-cfs.
• Littleville Dam: max flood release of 1,500-cfs.
• Borden Brook Mountain Dam: max flood release of 1,675-cfs.
• Cobble Mountain Dam: max flood release of 1,675-cfs.
• Knightville and Littleville Dam have minimum flows that are a function of season and reservoir inflow.
BUILDING STRONG®
System Operations within TributaryWhen two or more reservoirs operate for one site, ResSim uses a “system” operation that balances storage in the pools.
Knightville and Littleville operate to control flows at Westfield to not exceed 11,250 cfs.
Westfield
BUILDING STRONG®
System Operations for Mainstem
Hartford
Knightville and Littleville operate to reduce outflows if Hartford experiences high stages.
BUILDING STRONG®
Model Output
BUILDING STRONG®
Purpose
ResSim will be used to regulate and route hydrographs downstream.
Various reservoir management scenarios can be developed by changing rule sets for the involved project(s).
Regulated hydrographs for each scenario will be used to assess flow conditions at points of interest.