Transcript
00:03
once the basic shape of a pond has been defined,
00:06
the next task is to conduct a quick storage
00:08
estimate to obtain an approximate value for the volume.
00:13
This is then refined by simulating the network with a series of design storms
00:19
with a model open in the plan view in the results
00:22
tab click in flow summary and scroll to the bottom.
00:27
Note that the area to be analyzed is 2.5-1 hectares.
00:32
Keep that last value in mind as it will play
00:35
a critical role in setting the size of the pond.
00:37
Close the dialog
00:40
in the plan view double click the pond icon and open the sizing calculator.
00:46
Set the method. Drop down to quick storage estimate
00:49
and set the design up to drop down to free board.
00:53
You have the option to manually enter a
00:55
volume but instead click the calculator icon.
00:60
This opens a dialogue where you can input several values
01:04
set,
01:05
the input type drop down to user input and the area
01:09
field to 2.5 to the 2.5 to 1 hectares being analyzed,
01:15
rounded down
01:17
In the volumetric runoff coefficient field, enter a value of 0.750.
01:24
This means that during a rainfall event,
01:30
into the drainage system and eventually into the pond,
01:35
Enter a discharge rate of 16.1 which was
01:37
calculated earlier from the Green Field Runoff.
01:41
You can also enter a value for the ponds infiltration rate
01:45
or how much water will go into the ground through the walls of the pond.
01:50
In this case assume that the pond lining is Impenetrable
01:53
and do not enter a value.
01:56
The safety factor in this example is set to
02:04
expand the drop down below it and set it too quick.
02:08
Next
02:09
make sure the srp wizard F S R option is enabled,
02:14
click calculate to view the results.
02:17
The quick storage estimate for this pond is somewhere in the range of 705 and 997 m3.
02:25
Keep in mind these values are only estimates and
02:28
should not be used for final design purposes.
02:32
Click OK.
02:34
The sizing calculator now displays a volume of 850.796 m3 which is
02:40
the middle of the estimated volume range from the quick storage estimate.
02:44
Keep in mind that a full simulation will be required to confirm
02:47
the actual volume but this is a good approximation for now.
02:51
Click OK
02:53
notice that the ponds dimensions change slightly in the preview area of the pond.
02:57
Dialogue
02:59
click OK.
03:01
In the plan view you can see the
03:02
pond's appearance changed to reflect its new measurements.
03:06
In this example, the pond displays a blue line,
03:11
this is a layer of imported cad data that
03:13
gave an outline of the pond's initial shape and size
03:17
since it is no longer relevant,
03:19
click the box next to the pond outline dot D W G node in the tree view to deactivate it
00:03
once the basic shape of a pond has been defined,
00:06
the next task is to conduct a quick storage
00:08
estimate to obtain an approximate value for the volume.
00:13
This is then refined by simulating the network with a series of design storms
00:19
with a model open in the plan view in the results
00:22
tab click in flow summary and scroll to the bottom.
00:27
Note that the area to be analyzed is 2.5-1 hectares.
00:32
Keep that last value in mind as it will play
00:35
a critical role in setting the size of the pond.
00:37
Close the dialog
00:40
in the plan view double click the pond icon and open the sizing calculator.
00:46
Set the method. Drop down to quick storage estimate
00:49
and set the design up to drop down to free board.
00:53
You have the option to manually enter a
00:55
volume but instead click the calculator icon.
00:60
This opens a dialogue where you can input several values
01:04
set,
01:05
the input type drop down to user input and the area
01:09
field to 2.5 to the 2.5 to 1 hectares being analyzed,
01:15
rounded down
01:17
In the volumetric runoff coefficient field, enter a value of 0.750.
01:24
This means that during a rainfall event,
01:30
into the drainage system and eventually into the pond,
01:35
Enter a discharge rate of 16.1 which was
01:37
calculated earlier from the Green Field Runoff.
01:41
You can also enter a value for the ponds infiltration rate
01:45
or how much water will go into the ground through the walls of the pond.
01:50
In this case assume that the pond lining is Impenetrable
01:53
and do not enter a value.
01:56
The safety factor in this example is set to
02:04
expand the drop down below it and set it too quick.
02:08
Next
02:09
make sure the srp wizard F S R option is enabled,
02:14
click calculate to view the results.
02:17
The quick storage estimate for this pond is somewhere in the range of 705 and 997 m3.
02:25
Keep in mind these values are only estimates and
02:28
should not be used for final design purposes.
02:32
Click OK.
02:34
The sizing calculator now displays a volume of 850.796 m3 which is
02:40
the middle of the estimated volume range from the quick storage estimate.
02:44
Keep in mind that a full simulation will be required to confirm
02:47
the actual volume but this is a good approximation for now.
02:51
Click OK
02:53
notice that the ponds dimensions change slightly in the preview area of the pond.
02:57
Dialogue
02:59
click OK.
03:01
In the plan view you can see the
03:02
pond's appearance changed to reflect its new measurements.
03:06
In this example, the pond displays a blue line,
03:11
this is a layer of imported cad data that
03:13
gave an outline of the pond's initial shape and size
03:17
since it is no longer relevant,
03:19
click the box next to the pond outline dot D W G node in the tree view to deactivate it
Conducting a Quick Storage Estimate Step-by-Step Guide
