The HydroNet Explorer is a "docked dialog" that opens on the
left side of the drawing screen, and is used to create and edit
four types of components of a hydrologic project; subcatchments,
ponds, reaches, and links.
The general idea for the use of the HydroNet Explorer is that
you have already prepared a drawing for analysis.
This preparation would include:
Soils: The boundaries of the Hydrologic Soils Groups should be
drawn on the drawing layer specified in the Watershed Layers
dialog, with the A, B, C, or D labels on the layer specified for
that. These areas do not have to be closed polylines, as long
as the linework encloses each area that is part of the
study.
Ground Covers: The various Ground Covers in the study area
should be drawn as closed polylines on the layers specified in the
Watershed Layers dialog. These do not need to be
labeled.
Watersheds: The Watersheds (subcatchments) for the site
should be drawn and labeled. It is best to do this with
closed polylines, but it is not essential, as you can use an
alternative method of picking within the area and having the
software define it from drawing linework.
When you run the HydroNet Explorer command, you are prompted to
create a new .HYN file or open an existing one. This is the
file that stores all of the data about the components in the
project.
Once the HydroNet Explorer is open, the first
thing you should do is check the settings for the current
project. Pick the icon with the tools on it. In the
HydroNet Settings dialog, review the various tabs containing the
settings for the different aspects of the project. On the
General tab, set the surface to be used to provide the average
slope for each subcatchment when using the Curve Number/Lag
method.
On the Rainfall tab, if you want rainfall to be added to the
calculations in Carlson Hydrology, set up the rainfall parameters
here. If you want the rainfall data to be added in HydroCAD,
you can ignore this tab. Detailed information about setting
up Rainfall events in Carlson is under the Watershed section of the
Carlson documentation. There is also an icon at the top of
the HydroNet Explorer that you can use to import a Rainfall event
from a HydroCAD project file.
On the Report tab, establish the type of report and the details
of the report that you want for each of the 4 component
types.
Pick OK.
You can now use the HydroNet Explorer to automatically analyze
the drawing and add all subcatchments defined in the drawing.
Pick the Update button, and check all of the options.
To add Subcatchments manually, pick on the Subcatchment item in
the Explorer, and either right click and pick add from the submenu
or pick the Add icon.
In the Subcatchment dialog, enter the Number for the
Subcatchment. If you have the Subcatchment labeled in the
drawing, make the Number match the label. Pick the Edit
button next to the Area. In the Sub Areas dialog, pick the
Select Subcatchment button. Carlson Hydrology searches for a
subcatchment on the layer specified in the Watershed Layers dialog
that has a label that matches on the specified layer that matches
the Number. If it finds one, it highlights it and asks you to
confirm that this is the Subcatchment you are meaning to use.
If you pick Yes, the SubAreas are calculated from all of the
additional data in the drawing. Pick OK. Back in the
Subcatchment dialog, if you specified the CN/Lag method for Tc, the
Average Slope of the Subcatchment has been calculated and
displayed, and the longest polyline within the subcatchment on the
specified layer as been selected and it's length displayed.
Pick OK. The new Subcatchment is listed in the
Explorer.
The procedure to add Ponds, Reaches, and Links is similar to
Subcatchments, either right click and pick Add, or select the
category heading and pick the Add button below. The detailed
documentation on inputting data for these component types is found
in the Watershed section of the Carlson Hydrology
documentation.
Export to HydroCAD. If you are using HydroCAD in conjunction with Carlson Hydrology, once the elements of the study are added to the HydroNet Explorer, pick the Export to HydroCAD button to transfer the data to HydroCAD.
Any changes made in the drawing that
affect any of the components of the study can be instantly updated
and sent to HydroCAD with the Update button in the HydroNet
Explorer. Also, each individual component can be updated
alone with the update button within it's specific dialog
box.
The components listed in the HydroNet Explorer can also be drawn
into the drawing file with the Draw Layout in CAD button
(paintbrush). Set the desired parameters in the HydroNet Draw
dialog box.