From the HEC-ResSim main window (Figure 4.1), navigate to the Water Quality module (Figure 4.1). The module data panel allows users to select specific created water quality datasets to view in the map schematic (Figure 4.1). From the Toolbar (Figure 4.1) note the three Water Quality Tools (see Section 2.4.2). The top tool is the Water Quality Extent and Regions tool , which is used to set the geographic extent and regional divisions of a selected Geometry Dataset (e.g., GeometryData1 in Figure 4.1). The middle tool is the Mass Injection tool , which is only used for the mass injection dataset (refer to Chapter 11). The bottom tool is the Station Tool , which is only used for the meteorological and/or observed datasets (refer to Chapter 3 and Chapter 7, respectively). The use of the Water Quality Extent and Regions tool is discussed in detail in Sections 4.5.1 and 4.8.1 of this chapter.
ToolbarModulesStatus BarMap Schematic
Display AreaTitle BarMenu BarWater Quality ToolsModule Data
Figure 4.1 – HEC-ResSim Main Window – Water Quality Module – Water Quality Station Tools
Geometries require an HEC-ResSim Reservoir Network (refer to Section 4.4). When an existing Geometry Dataset is selected to display in the map window schematic in the HEC-ResSim main window (e.g., GeometryData1 in Figure 4.1), the reservoir network linked to the geometry dataset will display (Figure 4.1). A geometry dataset contains a single geographic Extent (refer to Section 4.5) and a single (or multiple) Regions (refer to Section 4.8). By default, the geographic extent of newly created geometry datasets includes all of the network elements in the HEC-ResSim reservoir network. However, the user is able to replace the default extent with a smaller extent that includes only part of the watershed (refer to Section 4.5.1). The Water Quality Extent and Regions tool (Figure 4.1) provides the capability to edit the default extent. This capability is beneficial when the watershed is large and the water quality (WQ) model only covers a small part of the watershed.
Furthermore, by default, newly created geometry datasets have only one region that contain the entire geographic extent is considered as a default region (refer to Section 4.8). Regions are used to encompass network elements of the geometry into groups for elements that share the same WQ Parameters (refer to Chapter 6). The Water Quality Extent and Regions tool (Figure 4.1) provides the capability to define different regions (refer to Section 4.8.1) for different sets of WQ Parameters.