InfiltrationTrench

The InfiltrationTrench subassembly inserts links to create an infiltration trench. The subassembly is based on requirements of the County of Los Angeles Low Impact Development Standards Manual, dated February 2014.

You should verify that the dimensions used match your interpretation of referenced document.

Attachment

The attachment point is at the top left, top center, or top right side of the infiltration trench.

Input Parameters

Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.

Parameter

Description

Type

Default

Pea Gravel Thickness Pea gravel thickness Numeric

0.67 ft

0.20 m

Include Filter Fabric? Indicates if filter fabric is below the pea gravel Yes / No Yes
Stone Thickness Thickness of stone layer Numeric, positive

3 ft

1 m

Sand Thickness Sand layer thickness Numeric

0.5 ft

0.15 m

Trench Width Width of trench Numeric, positive

2 ft

0.60 m

Attachment Point Attachment point Left / Right / Center Left

Target Parameters

This section lists the parameters in this subassembly that can be mapped to one or more target objects. For more information, see To Specify Corridor Targets.

None.

Runtime Logical Assignments

None.

Output Parameters

None.

Behavior

The initial point is set at the attachment point. The subassembly builds the shape for the infiltration trench.

Layout Mode Operation

In layout mode, this subassembly displays the infiltration components based on the input parameters given.

Point, Link, and Shape Codes

The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.

Point, Link, or Shape

Code

Description

P1, P2 PeaGravel Top of pea gravel layer
P3, P4 Stone Top of stone layer
P5-P6 Sand Top of sand layer
P7-P8 Sand_Datum Bottom of sand layer
L1 Top Top layer
L2 PeaGravel, FilterFabric Pea gravel layer; if Include Filter Fabric parameter is set to Yes, then filter fabric is included
L3, L4 Sand, Datum Top of sand layer
S1 Stone Stone layer
S2 Sand Sand layer
S3 PeaGravel Pea gravel layer

Coding Diagram