基于智水孪生的排水系统子汇水区数据集

该数据集主要包括基于Python读取的排水系统子汇水区数据，包括面积、坡度等属性。首先对面积小于设定面积的子汇水区进行合并，合并时根据设定的子汇水区合并方向、子汇水区出口与管网连接关系以及子汇水区的边界相交条件进行定制化合并。子汇水区合并时，针对不同的子汇水区的属性利用Python实现特定的计算方式：面积进行加和计算，宽度根据新面积开方得到，子汇水区不透水区百分比、坡度、不透水曼宁系数、透水曼宁系数、不透水区洼蓄量、透水区洼蓄量、无洼蓄量比例、最大入渗率、最小入渗率、衰减常数、晾干时间等属性，由被合并的子汇水区对应参数进行面积加权平均得到。子汇水区中LID控制的相关参数计算时，保留各LID控制中单元面积、单元数、单元表面宽度以及最初饱和比例等参数；利用原LID处理的不透水面积/透水面积百分比参数与对应原子汇水区中的非LID面积进行面积加权平均得到新生成的子汇水区的对应LID处理的不透水面积/透水面积百分比；对被合并的子汇水区中的LID数量进行加和。重新指定新生成的子汇水区出口，根据设定的子汇水区合并方向，将对应方向最上游或最下游的原有子汇水区出口作为新生成的子汇水区出口；若合并方向为向上游合并，多个原子汇水区的出流节点中有上游方向的原子汇水区出流节点为连接多个管道的多通节点，则自动停止遍历，将该多通节点下游的原子汇水区出口作为新生成的子汇水区出口。该数据可支撑排水系统模型模拟仿真、内涝应急预警和排水系统优化调度等。

This dataset mainly comprises subcatchment data for drainage systems extracted using Python, with attributes including area, slope, and other relevant parameters. First, subcatchments with an area smaller than the specified threshold are merged, and the merging process is customized based on the set subcatchment merging direction, the connection relationship between subcatchment outlets and the pipe network, and the boundary intersection condition of subcatchments. When merging subcatchments, specific calculation methods implemented via Python are applied for different attributes: the total area is calculated by summation; the width is derived from the square root of the new total area; attributes including the percentage of impervious area, slope, Manning's roughness coefficient for impervious area, Manning's roughness coefficient for pervious area, impervious area depression storage, pervious area depression storage, proportion of area without depression storage, maximum infiltration rate, minimum infiltration rate, decay constant, and drying time are obtained via area-weighted averaging of the corresponding parameters of the original subcatchments being merged. For parameters related to Low Impact Development (LID) controls in subcatchments: parameters such as unit area, number of units, unit surface width, and initial saturation ratio of each LID control are retained; the percentage of impervious/pervious area treated by LID for the newly generated subcatchment is obtained via area-weighted averaging using the percentage parameters of impervious/pervious area treated by LID in the original subcatchments and the non-LID area of the corresponding original subcatchments; the total number of LID controls in the original subcatchments being merged is summed. The outlet of the newly generated subcatchment is reassigned: according to the set subcatchment merging direction, the outlet of the original subcatchment that is the most upstream or most downstream in the corresponding direction is taken as the outlet of the newly generated subcatchment. If the merging direction is upstream merging, and among the outlet nodes of multiple original subcatchments, there is an upstream outlet node that is a multi-way junction connecting multiple pipes, the traversal is automatically stopped, and the outlet of the original subcatchment downstream of this multi-way junction is taken as the outlet of the newly generated subcatchment. This dataset can support applications such as drainage system model simulation, waterlogging emergency early warning, and optimal scheduling of drainage systems.