SS Credit 6.1: Stormwater Design—Quantity Control 1 Point Intent <

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试卷: SS 可持续场地[查看]
SS Credit 6.1: Stormwater Design—Quantity Control
1 Point

Intent
To limit disruption of natural hydrology by reducing impervious cover, increasing on-site infiltration, reducing or eliminating pollution from stormwater runoff and eliminating contaminants.

Requirements
CASE 1. Sites with Existing Imperviousness 50% or Less
OPTION 1
Implement a stormwater management plan that prevents the postdevelopment peak discharge rate and
quantity from exceeding the predevelopment peak discharge rate and quantity for the 1- and 2-year 24-hour design storms.
OR
OPTION 2
Implement a stormwater management plan that protects receiving stream channels from excessive erosion.
The stormwater management plan must include stream channel protection and quantity control strategies.

CASE 2. Sites with Existing Imperviousness Greater Than 50%
Implement a stormwater management plan that results in a 25% decrease in the volume of stormwater runoff from the 2-year 24-hour design storm.

Potential Technologies & Strategies
Design the project site to maintain natural stormwater flows by promoting infiltration. Specify vegetated roofs,pervious paving and other measures to minimize impervious surfaces. Reuse stormwater for non-potable uses such as landscape irrigation, toilet and urinal flushing, and custodial uses.

SS C 6.1: 雨洪设计—流量控制
1分

目的
通过减少非渗透铺装、本地渗透、消除雨水径流中的污染物质，降低对自然水文系统的影响。

情形1. 场址原有不渗透率等于或小于50%
选项1
采用雨洪管理措施，使得工程后的场址雨洪泄水率和量都不超过工程前1年和2年的24小时
的设计雨水。
或者
选项2
采用的雨洪管理措施，防止过渡冲刷产生汇水溪流。措施中必须包括汇水通道防止与水质控制
措施。
情形2. 场址原有不渗透率大于50%
采用的雨洪管理措施，可使得2年24小时设计降雨产生的径流量减少25%。

技术措施和策略
通过就地渗透，保持自然雨水，采用屋面种植、透水铺装和其他措施最小化地面不透水率。收
集雨水再利用非自来水场合，例如植物浇灌、冲厕等。