GB/T 38906-2020 in English
VALIDLow impact development stormwater management and harvest- Facility classification
- Issued on:2020-06-02
- Implemented on:2020-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 38906-2020 |
| Document status: | VALID |
| Title in English: | Low impact development stormwater management and harvest- Facility classification |
| Title in Chinese: | 低影响开发雨水控制利用 设施分类 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-06-02 |
| Implemented on: | 2020-12-01 |
| ICS Classification: | 35.040-Character sets and information coding |
| Chinese Classification: | A24-Codification |
| Professional Classification: | GB-National Standard |
| Related Keywords: | facility classification system
harvest- facility classification introduction interpretation classification system major categories low impact development stormwater management retention categories |
| Related Topics: | to develop
rainwater Effect of core moisture Influence Mechanism Three types of development GBT38906 GB/T 38906-2020 Low Impact Development Stormwater Control and Utilization Engineering Design Influence Zhengzhou rainwater utilization design |
《GB/T 38906-2020低影响开发雨水控制利用 设施分类》由424-cnis（中国标准化研究院）归口，主管部门为国家市场监督管理总局。
Introduction
Interpretation of the core content of the standard
GB/T38906-2020 has established a facility classification system including five major categories, including seepage and retention, collection and utilization, and adopts a 6-digit hierarchical coding structure. Among them, permeable pavement (010101-010105) and biological retention facilities (010201-010204) account for 42% of the seepage and retention categories.
Technical analysis of the classification system
| Major categories of facilities | Number of categories | Typical facilities | Main functions |
|---|---|---|---|
| Infiltration and retardation categories (01) | 6 | Permeable pavement, rain gardens | Runoff infiltration, pollution reduction |
| Storage and utilization categories (02) | 2 | Reservoirs, rainwater tanks | Rainwater collection and reuse |
| Regulation and storage categories (03) | 5 | Regulating ponds and wet ponds | Flow peak control |
Comparison of key technical indicators
Taking permeable pavement as an example, the standard clearly states that it is applicable to sites with permeability coefficient＞1×10-5m/s, and the performance of different materials varies significantly:
- Permeable asphalt concrete: high construction cost (200-300 yuan/m²) but suitable for motor vehicle lanes
- Grass-embedded permeable pavement: good landscape effect but maintenance cost increased by 30%
Standard implementation suggestions
- Preferably, permeable asphalt concrete should be given priority in the project site selection stage. class=instrument>bioretention facilities and other facilities with multiple benefits
- Use permeable pavement with caution in cold regions and require anti-freeze-thaw design
- The selection of ecological revetments needs to comprehensively consider flood control level and landscape requirements
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