This feature will design a pond from a closed 2D polyline that defines the top dam perimeter of the pond. Before beginning this routine, you must have surface entities or surface files and a closed polyline that represents the top of the dam. The command creates a top of dam of the specified width, and then projects inward to model the pond, and outward to model the slopes to match to the target surface. This command starts with the dialog shown here.
Source of Surface Model: The existing surface may defined by a 3D rectangular grid mesh (.grd file), a triangulation file (.flt or .tin file), or by screen entities. If the "Screen Entities" option is chosen, a grid file representing the existing surface will be internally created by using the user selected screen entities that depict the surface (Contours, Tri-Mesh, 3D Polys).
Design Slope Formula: Choose how you want to specify the slopes, either by ratio or percent.
Pond Bottom Surface: Choose how to specify the pond bottom surface, either use the original surface or use a set elevation.
Draw Slope Direction Arrows: This option draws an arrow on the outslopes that points in the downhill direction. Arrows on fill slopes are drawn as solid filled.
Arrow Size: Specify the size for the slope direction arrows.
Dam Top Width: Specify the width for the top of the dam.
Remove Top Bench in Cut: Is this option is checked ON and the
top of dam is in cut, then the
bench will be removed.
Pond Layer Name: Specify the layer for the pond entities.
The design is drawn as 3D polylines with an option to drawn contours on the pond, and the earthwork volumes and stage-storage volumes are calculated.
First the Design Bench Pond dialog box is presented.
If the Source of Surface Model is set to Screen Entities, when
you pick OK you are prompted to:
Pick Lower Left limit of pond disturbed area:
Pick lower left
Pick Upper Right limit of pond disturbed area:
Pick upper right Be sure to pick these limits well beyond
the area of the top of dam
polyline in order to make
room for the outslopes.
Make Grid File Dialog: Specify the grid resolution desired and
select
OK. Carlson Civil generates a 3D grid that
represents the existing surface, using the drawing entities that fall
within the specified area.
You are then prompted to:
Pick the top of dam polyline: Select closed polyline
Then proceed to design the pond...
If the Source of Surface Model is set to Surface File, when you
pick OK, you are prompted to:
Pick the top of dam polyline: Select closed polyline
Then select the Existing Ground
Surface Model file to use...
Then proceed to design the pond...
Enter the fill outslope ratio <2.0>: Enter
Enter the cut outslope ratio <2.0>: Enter
Enter the fill interior slope ratio <2.0>: Enter
Enter the cut interior slope ratio <2.0>: Enter
| TOP OF DAM POLYLINE |
 |
| Existing contours with top of dam polyline |
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| Bench Pond showing Slope Direction Arrows and complete with contours |
Range of existing elevations along dam top:
2021.20 to 2031.81
Enter the top of bank elevation <40>: Enter the pond bottom
elevation: 28
Write final surface to grid file (Yes/<No>)?
press Enter
Method to specify storage elevations
(<Automatic>/Manual)? press
Enter If manual is selected the user can specify the
elevation(s) to
calculate.
Write stage-storage file (Yes/<No>)? press Enter
This option creates a .cap file to use with
Pond Stage Storage Curve which draws the stage-storage curve. The
.cap file is also used in SEDCAD.
Adjust parameters and redesign pond
[Yes/<No>]? Y
If yes is chosen, the following 8 prompts appear:
Balance cut/fill [Yes/<No>]? press Enter
Enter the fill outslope ratio
<2.00>: 2.5
Enter the cut outslope ratio <2.00>: 2.5
Enter the fill interior slope ratio <2.00>: 2.5
Enter the cut interior slope ratio <2.00>: 2.5
Enter the top of dam width <10.00>: press Enter
Enter the top of bank elevation <2033.75>:
Enter the pond bottom elevation <2012.55>:
Offset top of dam polyline [Yes/<No>]? Y
If yes is chosen, the
following 2 prompts appear:
Offset inwards or outwards
[<In>/Out]? press Enter
Enter the amount to offset: 5
Write final surface to grid file (Yes/<No>)?
press Enter
Method to specify storage elevations
(<Automatic>/Manual)?
press Enter
Write stage-storage file (Yes/<No>)? press Enter
Adjust parameters and redesign pond (Yes/<No>)? press Enter
Trim existing contours inside pond perimeter (Yes/<No>)? Y
If yes is chosen, the following 2 prompts appear:
Retain trimmed polyline segments (Yes/<No>)? Y
Specify layer name for trimmed segments (Yes/<No>)? press Enter
Contour the pond (<Yes>/No)? press Enter
Refer to Triangulate & Contour
section of the manual for a full explanation of Contour Options
settings.
Report generated by Write Report to File option
Bench Pond Design Report
Top of dam elevation: 40.0000
Bottom of pond elevation: 28.0000
Top of dam width: 10.0000
Cut slope percent grade: 40.00, slope ratio: 2.50
Fill slope percent grade: 40.00, slope ratio: 2.50
Interior slope percent grade: 50.00, slope ratio: 2.00
Lower left grid corner: 186395.20,57620.23
Upper right grid corner: 186803.82,57872.93
X grid resolution: 50, Y grid resolution: 50
X grid cell size: 8.17, Y grid cell size: 5.05
Pond EarthWork Volumes
Total fill: 2087.624 C.Y., 56365.84440 C.F.
Total cut: 772.791 C.Y., 20865.34961 C.F.
Pond Storage Volumes
Water Elev: 30.00, Pond Storage: 179.887 C.Y., 4856.94921 C.F.
Water Elev: 32.00, Pond Storage: 453.708 C.Y., 12250.12126 C.F.
Water Elev: 34.00, Pond Storage: 817.981 C.Y., 22085.48186 C.F.
Water Elev: 36.00, Pond Storage: 1321.035 C.Y., 35667.93750 C.F.
Water Elev: 38.00, Pond Storage: 2001.216 C.Y., 54032.83340 C.F.
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| 3D view of Bench Pond |
Pulldown Menu Location: Grading
Keyboard Command: bpond
Prerequisite: Closed polyline that defines top of dam and
surface entities
File Names: \lsp\flatpond.fas, \lsp\pond.arx