Dataset of a laboratory experiment on the effect of the storage capacity of a city block on unsteady urban floodwaters

This dataset is composed of experimental measurements collected on a laboratory facility, a 5.4 m long and 3.2 m wide tilted platform. The latter represents an urban area, consisting of a porous rectangular city block (one opening on each sidewall) and four surrounding streets. The experiments were performed under unsteady flow conditions, using three different inflow hydrographs (denoted as H.LSS, H.LLL and H.SLS), all with the same peak discharge (Qpk ≈ 5 l/s). Additional experiments were carried out under steady flow conditions, for an inflow discharge of 5 l/s. Measurements were conducted by varying the storage capacity of the city block (φ = 0, 0.5, 0.75, 0.9 and 1). We present here the following measurements: (1) one inflow discharge and four outflow discharges; (2) flow depths in the inlet street, four outlet streets, and four streets surrounding the block, as well as flow depths within the city block (11 locations); (3) velocities in the right-hand and left-hand streets (2 locations), only for the inflow hydrograph H.LSS and steady flow.

该数据集由实验室装置采集的实验测量数据组成，所述装置为长5.4米、宽3.2米的倾斜平台。该平台模拟城市区域，包含一个多孔矩形街区（每个侧壁各设一个开口）及四条周边街道。实验在非恒定流条件下开展，采用三种不同的入流过程线（inflow hydrograph）（记为H.LSS、H.LLL及H.SLS），所有过程线的峰值流量一致（Qpk≈5升/秒）。此外，还在恒定流条件下进行了补充实验，入流流量为5升/秒。测量通过改变街区的存储容量（φ=0、0.5、0.75、0.9及1）实施。本文呈现的测量内容如下：（1）1组入流流量与4组出流流量；（2）入口街道、四条出口街道、街区周边四条街道的水深，以及街区内部（11个位置）的水深；（3）仅针对入流过程线H.LSS及恒定流条件，右侧街道与左侧街道（2个位置）的流速。