1. The document discusses using PHP and MySQL to manage hydrodynamic flood models. PHP scripts are used to manipulate flood model meshes and results from the command line and present visualizations. 2. A PHP class library has been developed over 7 years to manipulate spatial data and store it in a MySQL database. PHP acts as an interface between command line tools to analyze and visualize flood modeling outputs. 3. Examples show how PHP can be used from the command line to generate meshes, run flood models, and create 3D visualizations of results to effectively summarize large, complex spatial datasets.

1. Managing Hydrodynamic Models with PHP Sydney Open Source Developers’ Conference 3 rd December 2008

8. Example PHP Command Line Session

9. Example PHP Script

10. Flood Modelling Process

11. cli_progress_bar

16. Air Photo

17. Levels of Detail in Terrain Models

18. Initial 2D Finite Element Mesh

19. PHP Classes

20. PHP Library Input/Output Formats

21. Flood Modelling Process

24. Data Flow and Storage

25. Example PHP Script

27. 2D Interpolation

28. 3D Interpolation

29. Vector to Raster Conversion Depth Animation

31. Raster Database Structure

32. Terrain Model Properties - Pixel 1207,535

33. Design Storm Flood Depths Depth Animation

34. Design Storm Velocities

35. 2D Animation Example

36. Databases

37. Indexing Structures - Nodes

38. Indexing Structures - Elements

39. Indexing Structures

40. Indexing Structures - Edges

41. Indexing Structures - Fulledges

42. Cross Sections Through an Irregular Mesh

44. Levels of Detail

45. Area of Interest - 20000 Element Mesh

48. Level of Detail in the Finite Element Mesh

53. Air Photo

54. RMA Mesh

55. Thematic Representation of Maximum Depth

56. Heightfield

57. Using Povray to Create a 3D Render

58. Air Photo

59. DTM – Ground Returns

60. DTM – Non-Ground Returns

61. 100 Year ARI Depth at Time 79500 seconds

62. Heightfield

63. Flood Model Results Draped on Heightfield

68. Rainfall Intensity Animation