Composite Section: A Two-Layered Embankment

A stepped flood control cross-section. Walking from the city side towards the water, the elevation descends step by step: the uppermost layer is a levee-top pathway and green belt level with the street; the middle is a wide, elevated flood plain platform, usually a lawn and sports field, which will be submerged during major floods; the lowest layer is a low-lying bank near the water and a water-friendly pathway, which floods several times a year. The three layers are connected by gentle slopes or large steps. The flood control function is collectively borne by the entire cross-section. Avoid: solving all elevations with a single vertical wall, having only stairs between layers preventing barrier-free access, building water-sensitive facilities in areas that will be submerged, or making the layers of the cross-section invisible in a plan view.

Translated from Chinese by AI.

一道階梯狀的防洪斷面。從城市側往水邊走,高程一階一階降下來:最上層是與街道齊平的堤頂步道與綠帶;中間是一片寬闊的高灘平台,平常是草地與球場,大洪水時會被淹;最下層是靠近水面的低灘與親水步道,每年淹好幾次。三層之間以緩坡或大階梯相連。防洪的功能由整個斷面共同承擔。避免:用單一道垂直牆解決所有高程、讓各層之間只有樓梯無法無障礙通行、把會被淹的區域做成怕水的設施、讓斷面的層次在平面圖上看不出來。