Island ecosystems unleashed: rain gardens transforming flood management in Galápagos

This article delineates a sustainable stormwater drainage system designed to prevent floods in Santa Cruz Island, specifically in Puerto Ayora. The proposal prioritizes minimizing human intervention impact on infrastructure, considering the local context. A comprehensive environmental analysis covering topography, climate, hydrology, urban, and landscape aspects informs the design, ensuring adaptability to the island’s future needs. The core features a channel drainage system incorporating gutters, sinks, and filter gardens. Filter gardens retain stormwater, allowing controlled discharge, interconnected from house downspouts to channels. Three strategically proposed drainage systems connect to different discharge points: a lake, an aquifer, and the sea. This diverse approach avoids large excavations, reducing costs and preserving local flora and fauna. The result is a sustainable drainage solution aligned with a nature-based paradigm, effectively reducing runoff flow.

本文详述了一套专为圣克鲁斯岛（Santa Cruz Island）波多阿约拉（Puerto Ayora）地区设计的可持续雨水排水系统，旨在防范洪涝灾害。该方案充分结合当地实际情境，优先将降低人类活动对基础设施的干预影响作为核心设计原则。设计过程依托覆盖地形、气候、水文、城市与景观等维度的全面环境分析，确保系统可适配该岛屿的未来发展需求。其核心为一套集成檐槽、雨水沉井与过滤花园的渠道式排水系统：过滤花园可滞留雨水并实现可控排放，且连接链路覆盖从住宅落水管直至排水渠道的全流程。方案共规划三套布局优化的排水系统，分别接入三类差异化排放节点：湖泊、含水层与海洋。该多元化设计避免了大规模土方开挖，既降低了建设成本，又有效保护了当地动植物群落。最终形成的这套可持续排水方案契合自然本位设计范式，可有效削减径流流量。