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  1. Observed Rainfall

     allow the flexibility of analyzing unique hyetograph data and historical rainfall gauge data. Creating a set: A set of rainfall records is produced using the spreadsheet and buttons provided. Buttons Add Adds a new row to the table and displays the rainfall record form ready for the rainfall data to be entere
  2. Rainwater Tank Analysis

    The Rainwater Tank is considered as two distinct volumes. The Retention volume provides a Harvest Flow which is a constant outflow which is lost from analysis. The Detention volume provides storm water attenuation and an outflow which, in analysis, continues to the next node. Any overflow also passes to the next node.
  3. IDF

    The Rational Method (and its variants) bases its calculations on Rainfall Data in the form of Intensity, Duration and Frequency (IDF) data. IDF files are created on the principle that for a given Return Period (or Frequency) and a set duration, a storm will have a known average intensity. For example a storm near
  4. Temporal Pattern

    To produce a suitable rainfall event from a total depth and duration it is necessary to add a shape, or profile, to a storm which is characteristic of the geographical location. These shapes are usually expressed as a Temporal Pattern. If you combine an average intensity read from the User Defined table with a Temporal
  5. XPSX Files

    An XPSX file is the file format used by xpdrainage for surfaces created within the software. it contains both the raw data (vertices and breaklines) as well as the fully triangulated surface. When data is loaded form another file source (.txt, .csv, .xls, .xlsx, .xml, etc), or entered directly by the user, the so
  6. Preferences

    Allows a variety of global settings to be modified as required by the user. Allowable Undos - Sets the maximum number of Undo/Redo actions that are maintained. The higher the value the bigger the amount of disk space and processing time is used.   Analysis Mode - The analysis mode dicates how the results of are ma
  7. PWF Files

    The PWF file contains a number of spot ground levels and a list of how these levels are connected as triangles to form a solid terrain profile. The file was original created to allow a triangulated surface to be exchanged between the PDS and MicroDrainage design packages commonly used in the UK. The file format i
  8. File Menu

    The File Menu allows changes to xpdrainage designs and background preferences.  New Creates a new xpdrainage design. Open Load an existing xpdrainage design file. Open Recent Displays a list of the last files worked on and their filepaths.  The files can be opened from this location.  Save Allows the Site to
  9. Go

    The Go button launches an analysis of the Site (for all active Phase Management). Once selected GO will show a progress bar indicating the remaining duration of the analysis. xpdrainage2017.3_go.png Note: The site will be Validate prior to the analysis, any failures will be displayed and prevent analysis.
  10. Pollutant Removal Methods

    Pollutant Removal data is added via the Pollution tab of a Stormwater Control. xpdrainage 2017.3_pollutant_removal_methods.png There are two pollutant removal methods available in xpdrainage: Percentage Removal First Order Decay Section Pages Pollutants Workflow - What's next...? xpdrainage_20