Flood Detention, Sedimentation, and Purification: Three Ponds in a Row

A series of connected water bodies. The first pond is a pre-treatment sedimentation basin, small and deep, where sand, gravel, and debris are left behind as water enters; the second pond is wide and shallow, filled with emergent plants, where water flows slowly and is filtered; the third pond is the largest and deepest, with clear water, serving as the final flood retention and habitat space. The three ponds are connected by cascades or gravel weirs, with a height difference of less than thirty centimeters, creating sound and aeration as water flows through. Avoid: making only one pond to bear all functions, connecting the three ponds with hidden pipes so water flow is invisible, making the pond bodies geometric shapes, using mechanical equipment to replace gravity and plant purification.

Translated from Chinese by AI.

一組串聯的水體。第一池是前置的沉砂池,小而深,水進來時把砂石與垃圾留下;第二池寬而淺,種滿挺水植物,水在裡面緩慢流動被過濾;第三池最大最深,水質清澈,是最終的滯洪與棲地空間。三池之間以跌水或礫石堰相連,高差不到三十公分,水流過時有聲音也有曝氣。避免:只做一個池承擔所有功能、讓三池之間用管線暗接看不見水流、把池體做成幾何形狀、使用機械設備取代重力與植物淨化。