creating a flood warning system for the san diego … · creating a flood warning system for the s....
TRANSCRIPT
Creating a Flood Warning System for the San Diego River
Watershed
Martin J. Teal, P.E., P.H., D.WREWEST Consultants inc.
Darren BertrandWEST Consultants Inc.
Rand AllenSan Diego County
OUTLINE
• San Diego River Watershed
• HEC-RTS Overview
• San Diego River models created for HEC-RTS
• San Diego River HEC-RTS
• Questions/Discussion
Qualcomm Stadium in Mission Valley during the 2010 Flooding Eventhttp://www.dailymail.co.uk/
River Ridge Golf Course in Mission Valley during the 2010 Flooding Eventhttp://www.dailymail.co.uk/
Mission Center Road in Mission Valley during the 2010 Flooding Eventhttp://www.dailymail.co.uk/
HEC-RTS OVERVIEW
• HEC-RTS is the Hydrologic Engineering Center’s Real-Time Simulation program
• HEC-RTS is a publically avaliable version of the Corps Water Managment System (CWMS) that runs on a single computer without using an Oracle database or a UNIX Server
HEC-RTS OVERVIEW
• HEC-RTS provides support for decision making using any combination of the following models:
• Meteorology (MFP)
• Hydrology (HEC-HMS)
• Reservoir operations (HEC-ResSim)
• River hydraulics (HEC-RAS)
• Flood impact/economic analysis (HEC-FIA)
METEROLOGIC MODEL (MFP)• The Metrologic Forecast Processor
(MFP) combines observed precipitation with Future precipitation scenarios
• The San Diego River HEC-RTS model creates gridded rainfall datasets from 26 point precipitation gages located throughout the watershed and combines these with future rainfall derived from the National Weather Service QPFs (Quantitative Precipitation Forecasts)
• Manual forecasted precipitation can also be input (e.g. No Future Rainfall)
HYDROLOGY MODEL (HEC-HMS)• Rainfall runoff calculations are
computed using the hydrologic modeling software HEC-HMS
• The watershed was divided into 49 subbasins
• Constant-Deficit Loss Method
• Gridded ModClark Transformation Method
• Muskingum Routing Method
• Recession Baseflow Method
HYDROLOGY MODEL (HEC-HMS)• Two calibration events and one validation event were used to develop a single set of
parameters to be used in the HEC-RTS hydrology model (Dec 2004, Dec 2010, Feb 2011)
• Three USGS stream flow gages as well as computed inflow into the San Vicente and El Capitan Reservoirs were used for the calibration process
San Diego River Fashion Valley gage 2010 Event San Diego River Santee Gage 2004 Event
HYDRAULIC MODEL (HEC-RAS)• River Hydraulics are computed with
hydraulic modeling software HEC-RAS
• Hydrographs produced by the HEC-HMS hydrology model are used as inflow boundary conditions in the unsteady HEC-RAS model
• The unsteady RAS model for the San Diego River covers over 75 miles of river reach has over 60 culverts/bridges and 3 reservoirs with inline structures
• The entire main reach of the San Diego River along with San Vicente, Boulder, Forester and Los Coches tributaries are modeled
HYDRAULIC MODEL (HEC-RAS)• HEC-RAS will
compute water surface profiles and stage hydrographs along with inundation boundaries and depth maps
HEC-RTS MODULES• The Control and Visualization Interface (CAVI) is the
primary framework of RTS and controls the other functional modules.
• Watershed Setup Module
• Data Acquisition Module
• Data Visualization Module
• Model Interface Module
ADDITIONAL HEC-RTS FEATURES
• The use of custom scripts and a script editor allows the user to create custom features in HEC-RTS such as:
• Auto Schedule Data collection processing
• Auto schedule forecast simulations to be run an a daily basis
• Automatic report generation and posting from user specified locations
IMPLEMENATATION AND NEXT STEPS
• Floodplain Mapping static maps for quick reference
• Set up of system and data links on County workstation
• Development of a user manual
• Customized on-site training for County staff
• Fully Operational in late fall of 2015