RAINWATER MANAGEMENT
雨水管理

INTENT / 目的

To reduce runoff volume and improve water quality by replicating the natural hydrology and water balance of the site, based on historical conditions and undeveloped ecosystems in the region.

通过模拟场地自然水文和水均衡（基于该区域历史条件和未开发生态系统），减少径流总量并改善水质。

REQUIREMENTS / 要求

Option 1. Minimum Rainwater Management (1 Point)
选项1：最低雨水管理（1分）

Projects up to 70 acres. Use low-impact development (LID) and green infrastructure (GI) to replicate natural site hydrology. Retain on site the runoff from the developed site (for the 85th percentile local or regional rainfall event). Manage runoff from the developed site for the 85th percentile local or regional rainfall event using documented LID and GI strategies from the LEED v5 Reference Guide.

场地不超过 70 英亩（28.3 公顷）。利用低影响开发(LID)和绿色基础设施(GI)复制自然场地水文。就地滞留已开发场地在85百分位局部或区域降雨事件下的径流。使用LEED v5参考指南中记录的LID和GI策略管理已开发场地的85百分位降雨径流。

Option 2. Enhanced Rainwater Management (2 Points)
选项2：增强雨水管理（2分）

Meet Option 1, plus manage runoff from the developed site for the 95th percentile local or regional rainfall event.

满足选项1要求，并额外管理已开发场地在95百分位局部或区域降雨事件下的径流。

Option 3. Comprehensive Rainwater Management (3 Points)
选项3：综合雨水管理（3分）

Meet Option 2, plus design the site to maintain natural site hydrology by following one of these paths:

满足选项2要求，并通过以下任一途径设计场地以维持自然水文：

• Path 1. Zero Lot Line — Projects with a zero-lot-line that can demonstrate more than 50% of the rainwater from the building footprint is captured on-site or in an off-site system.
  路径1 零退线：零退线项目可证明建筑基底超过50%的雨水被场地或场外系统捕获。
• Path 2. Pre-Development Replication — Projects where the proposed design captures the difference between the pre-development and post-development runoff volume for the 95th percentile rainfall event using LID and GI practices that infiltrate, evapotranspirate, or collect and reuse at least 25% of the runoff from the impervious surfaces within the LEED project boundary.
  路径2 开发前复制：设计方案捕获开发前后95百分位降雨径流差额，使用LID/GI实践渗透、蒸散或收集回用LEED项目边界内不少于25%的不透水表面径流。

Exemptions / 豁免

• Healthcare, data centers, warehouses, and distribution centers are only eligible for Option 1.
  医疗、数据中心、仓库和配送中心仅可选选项1。
• Previously developed sites with 50% or more existing impervious area are only eligible for Option 1.
  不透水下垫面占比≥50%的已开发场地仅可选选项1。