WMS:HSPF Basin Data

The portion of the Edit HSPF Attributes dialog box that handles basin data is mainly a starting point for entering the rest of the basin segment’s HSPF data. The text in the window lists the land segments within the selected basin. When a segment is selected within the text window, it becomes possible to edit the attributes of that segment. The area section, above the basin section, shows the sum of the areas of the individual basin segments as well as the area of the basin as calculated by WMS if a terrain model was used to calculate basin data. A radio group is located in the basin area of the dialog box to allow the user to specify whether the segment is pervious or impervious. The Define Activities button brings up dialog which allow the user to activate modules (i.e. PWAT, PQUAL, IWAT, etc.) for the selected segment and define the required parameters. The External Targets button allows the user to define the output for the selected segment as required by the EXT TARGETS block of HSPF.

Below the text window listing the basin segments, buttons may be found to add or delete segments within the basin. The new basin segments default to pervious land segments with no specified area. This a way to segment a basin manually if no land use data exist to perform automatic segmentation.

Related Topics

• HSPF Modules
• Entering HSPF Parameters
• Pervious Land Segment
• Impervious Land Segment
• External Sources
• External Targets