GB/T 39599-2020Low impact development stormwater management and harvest—Basic terminology (English PDF)

1 Scope

This standard defines the basic terms, facility terms and technical terms in the practice of low-impact development rainwater control and utilization:

This standard applies to the design, planning, construction, maintenance, management and evaluation of low-impact development rainwater control and utilization systems:

2 Basic terminology

2:1

Low impact development; LID Emphasizing that urban development should reduce the impact on the environment, its core is based on the concept of source control and reducing impact

However, appropriate drainage projects, rational use of space and corresponding measures to control storm runoff, reduce urban runoff pollution (2:5):

Note: Rewrite GB 50014-2006 (2016 edition) and define 2:1:8B:

2:2

Spongecity

Through the management and control of urban planning and construction, starting from "source emission reduction, process control, system governance", comprehensively adopting "infiltration, retention, storage, net, utilization,

Technical measures such as “drainage”, coordinate water quantity and water quality, ecology and safety, distribution and concentration, green and gray, landscape and function, onshore and offshore,

The relationship between the ground and the underground can effectively control urban rainfall and runoff (4:2:1), and minimize the impact of urban development and construction on the original natural water:

The cultural characteristics and the destruction caused by the water ecological environment enable cities to be like "sponges" in adapting to environmental changes and resisting natural disasters:

It has good “flexibility” to realize the urban development mode of natural accumulation, natural penetration and natural purification, which is conducive to the restoration of urban water ecology and conservation:

The multiple goals of raising urban water resources, improving urban water environment, ensuring urban water safety, and reviving urban water culture:

[GB/T 51345-2018, definition 2:1:1]

2:3

Spongeeffect

The natural hydrological feature maintenance and restoration effect realized by the construction of sponge city (2:2):

[GB/T 51345-2018, definition 2:1:3]

2:4

Urbanwaterbody

Natural or artificial water bodies such as rivers, lakes, wetlands, ponds and ponds in the urban planning area:

[GB/T 51345-2018, definition 2:1:9]

2:5

Runoffpolution

Through rainfall and surface runoff, pollutants in the atmosphere and the surface are brought into the receiving water body, and the receiving water body is polluted:

It is the main source of urban non-point source pollution:

2:6

Runoffsourcecontrolsystem

Before rainwater is discharged into the municipal drainage pipe system, in order to achieve control of rainwater runoff generation, reduce rainwater runoff pollution (2:5), collect and use

A control system adopted for the purpose of rainwater and peak flow reduction: