A percolation trench, also called an infiltration trench, is a type of best management practice (BMP) that is used to manage stormwater runoff, prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay.

An infiltration trench typically consists of a gravel-filled trench that allows stormwater to soak into the ground. Various infiltration trench designs exist; a design may include an overflow, an underdrain or vegetation.

An Infiltration Trench is a linear stormwater BMP consisting of a continuously perforated pipe at a minimum slope in a stone-filled trench (Figure 6.4-1). Usually an Infiltration Trench is part of a conveyance system and is designed so that large storm events are conveyed through the pipe with some runoff volume reduction.

An Infiltration Trench is a narrow excavation backfilled with a high porosity material that has no outlet and is designed to create storage of highway drainage that treats runoff through infiltration. An Infiltration Trench may also be known as a water quality exfiltration trench. The primary functions of this document are to:

2010年11月1日 · Infiltration trenches and dry wells are standard stormwater management structures that can play an important role in Low Impact Development site design. Dispersed around the site, these infiltration structures can recharge groundwater and help to maintain or restore the site’s natural hydrology.

infiltration or percolation tanks, soakaways or underground infiltration basins. While infiltration trenches are usually rock filled ditches into which stormwater enters from the top, exfiltration trenches often involve a pipe in the middle of the trench through which stormwater enters. Objectives: These structures capture and discharge stormwater

The basic infiltration trench design utilizes stone aggregate in the top of the trench to promote filtration; however, this design can be modified by substituting pea gravel for stone aggregate in the top 0.3 meter (1 foot) of the trench.

Exfiltration Trench Systems (also known as perforated pipe systems, clean water collectors, or percolation drainage systems) are infiltration trenches integrated with conventional stormwater conveyance systems (i.e. catch basins, pipes and maintenance holes) and designed for both conveyance and infiltration functions.

This example focuses on the design of an infiltration trench to meet the water quality treatment requirements of the site. Channel protection and overbank flood control is not addressed in this example other than quantification of preliminary storage volume and …

Trench percolation A trench percolation system uses a series of specially designed 4" perforated pipes in stone lined trenches to distribute treated effluent to the subsoil, where it undergoes further treatment.