1. Water Network Analysis During Contingencies Allen Thibeaux CVEN 689 - Texas A&M University 18 Apr 02

2. Overview Purpose Data Development Use Progress Summary

3. Purpose - Background Military base recovery Damage assessment Water as median for attack Quick answers GIS solution

4. Purpose - Questions What parts of the network are cut off if damaged? Do we have enough pressure to fight fires? How fast can chemical/biological agents travel in the network?

5. Data - Location Town of Cary, North Carolina Water pipe network Water facility data

6. Data - Information Provided –Pipe length –Pipe diameter –Pipe locations Required –Friction/elevation –Demand

7. Data - Preparation Prepare for Net Analyst Broken links Select pipes for analysis Develop attribute tables –Flow/flow direction –Friction –Demand Develop loop table

8. Data - For Analysis

9. Development - Analysis Method Hardy Cross method for pipe networks –Analysis of loop network –Iterative process

10. Development - Test Case Simple test for application Set up initial assumptions 13 4 2 56 5cfs 1cfs 3cfs 5cfs10cfs 5cfs 4cfs 5cfs 7cfs10cfs

11. Development - Application Microsoft Access Visual Basic Structured Query Language (SQL) Can change Q and f values to test many kinds of scenarios

12. Planned Use Service areas –Flow (time) –Pressure Answer the questions –Breaks –Pressure –Time

13. Progress Problem Definition GIS Dataset Selection GIS Data Preparation Develop GIS Data Data / Application Integration Application Development Application Test Test Scenarios Answer the Questions!

14. Summary Purpose Data Development Progress Summary

15. Questions