DSM2, Version 7

CWEMFFebruary 26, 2007

Eli Ateljevich, PhD Department of Water Resources

Delta Modeling Section

Talk Outline

• Information management

• Input changes and GUI

• New model features

• Status

Database Information Management Goals

• Consistency

• Version control

• Scenario management

• Extensibility and reuse of common items

• Transparency

• NOT an archive of runs

Layer Based Input

12

3

4

56

2 (revised)

7 (added)

Grid layer 1

Grid layer 2

IO System and GUI

• Graphical user interface (GUI) front end for database

• Timed IO stored in DSS, assigned in GUI

• Some run-specific items can be input in text

• PTM is text based

• HDF5 is used for the “tidefile”

DSM2 Input GUI

New Model Features

• Gates with multiple, more physical structures

• User-written operating rules

• More reliable solvers

• Readable tidefile using HDF5

• CONDOR-friendly for batch simulations

• Old/inconsistent features deprecated

Gates With Multiple Structures

Physical Gate Positions

elev

heightelev

Variable weir crest

Radial/sluice

Operating Rules

Steering

Input

Model

observation

dec

isio

n

Example – Operate a Gate Based on Water Levels

Time

Upper Stage Trigger

Lower Stage Trigger

Close Gate

Open Gate

Sta

ge

(ft

)

DSM2 Database Interface

HDF5 Tidefile

• Robust – designed for NASA satellite data

• Tools – both DWR and open source

• More useful data and better structure coming soon:– QUAL – Stage (as opposed to flow area)

Numerical Reliability: DB vs Text

• Better closure in HYDRO

– Maxiter nearly eliminated

– Closure based on solution, not slowdown

– Continuity ensured

• Small fixes in QUAL nonconservative, conservative same

• PTM velocities time-centered

Do They Give The Same Answer?

• Solutions in identical cases same• Some production items have been “translated”:

– Geometry: DB has one kind of cross-section– Gates: make use of the new features

• Testing includes isolated calculations (e.g. gate equations) and production runs

• Time centering in PTM big improvement for some situations

Project Status

• Production DSM2 runs from desktop (Access) and Informix database in progress

• Delta Modeling Section conversion mandated within a month– 2-day training course and tutorials completed by all

• External use within 6 months

Contact

• Eli Ateljevich eli@water.ca.gov

Ralph Finch, Tawnly Pranger, Edward Diamond, Jon Shu, Jeff Galef

Acknowledgments