Rainwater Management
雨水管控
Excess rainwater is typically referred to as stormwater when it starts to collect and flow across the surface of a site.
当多余雨水开始在场地表面积聚、流动时，通常被称为雨水径流。
When this water falls on hard, impervious surfaces that keep precipitation from percolating through the soil, like asphalt and concrete, it is not able to soak into the ground.
当雨水落在沥青、混凝土等坚硬不透水面上时，无法下渗至土壤中。这类表面会阻碍降水渗入地下。
The rainwater runoff, or excess rainwater that collects and flows across the surface of a site, can cause soil erosion and excess sediment in local waterways, exacerbate downstream flooding, and carry harmful chemicals, like motor oil and lawn fertilizers, into the water system.
雨水径流（即场地表面积聚并流动的多余雨水）会造成土壤侵蚀、使河道泥沙淤积，加剧下游洪涝灾害，并将机油、草坪肥料等有害化学物质带入水体系统。
Green Building Strategies
绿色建筑策略
Green buildings implement rainwater management practices on the project site to capture and retain rainfall in ways that mirror natural systems in order to limit runoff.
绿色建筑在项目场地内实施雨水管控措施，通过模拟自然生态系统的方式收集、滞留雨水，以控制雨水径流。
Strategies include:
管控策略包括：
? Minimizing impervious areas by selecting pervious materials that allow precipitation to seep through the surface down to underlying layers of soil and gravel, such as vegetated roofs and porous pavement and grid pavers for parking lots, walkways, and outdoor spaces like patios
- 选用可使降水下渗至下层土壤与砾石层的透水材料，最大限度减少不透水面积，例如停车场、步道、露台等户外空间采用植被屋面、透水铺装及格栅砖
? Guiding the water into on?site landscaping features designed to increase the infiltration of rainfall into the ground and slow the rate of runoff, such as dry ponds or rain gardens
- 将雨水导入场地内可增强雨水下渗、减缓径流速度的景观设施，例如干塘、雨水花园
? Using natural processes, such as planted channels known as swales, to treat any remaining water that runs off the property
- 利用植草沟等自然设施，对场地剩余径流雨水进行净化处理
? Capturing and reusing the rainwater for other on?site purposes such as landscape irrigation, toilet flushing, or heating and cooling
- 收集并回用雨水，用于场地景观灌溉、冲厕或暖通系统用水等
Quality of life: When rainwater is not properly managed, downstream flooding disproportionately impacts socially vulnerable populations, such as racial minorities and mobile home residents.
生活品质：当雨水管控措施不到位时，下游洪涝灾害会对社会弱势群体造成尤为严重的影响，例如少数族裔与活动板房住户。
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