排水课程设计计算说明书.doc

排水设计计算说明书 学院：环境科学与工程学院 专业：给水排水工程专业 级别: 200 级 指导教师： 姓 名： 学 号： 时 间：200 年6月1 目录 Ⅰ. 排水管道工程课程设计任务书······································2 一.基本资料·····················································2 二.设计依据·····················································3 三.排水管网设计任务 ············································3 Ⅱ. 污水管道设计计算说明···········································4 一.划分排水流域及管道定线·······································4 二.确定污水管道设计流量·········································4 （1）居民区污水设计流量···········································4 （2）工业区污水设计流量···········································5 （3）比流量计算··················································5 （4）管段设计流量················································5 三.污水管道水力计算·············································8 四.成果图绘制···················································9 Ⅲ. 雨水管道设计计算说明···········································10 一.划分排水流域及管道定线······································10 二.主要设计参数················································11 （1）暴雨强度公式···············································11 （2）地面径流和径流系数··········································11 （3）折减系数··················································12 三.雨水管道水力计算············································12 四.成果图绘制··················································13 Ⅳ. 附表 一.污水管网管线水力计算表······································14 二.雨水管网管线水力计算表······································16 排水管道工程课程设计任务书 一、基本资料 1、 ZQ镇规划面积平面图1张。 2、地理位置及地形特点：ZQ镇位于浙江省宁波市境内，规划杭州湾高速公路的东侧，329国道贯穿南北。规划用地面积2.16 km2。全镇地势北高南低，西高东低，海拔在4.5~6.5 m之间。 3、规划中该镇由329国道分为南北两区，南面为居民生活区，北面为工业区。居民区人口密度为200人/ hm2，建筑多为2~3层，最高为6层；规划工业区主要为电器、精密机械制造业，在计算用水量时，可折合人口密度为100人/ hm2，按照居民区的计算方式进行，最低服务水头要求为20 m。 4、气温：ZQ镇位于北亚热带南缘，属季风型气候。冬夏稍长，春秋略短。温暖湿润，气温变幅小。年平均气温16.1℃，1月平均气温最低，历年平均4.0℃，7月平均气温最高，历年平均28.2℃，极端最低气温-9.3℃，极端最高气温39.1℃。冰冻线深度0.6 m。 5、降雨：年平均降水量(含雨、雪、冰雹)1259.6mm，年降水量少于1000mm的少水年占15%，大于1500mm的丰水年占17.6%。平均10年中有大旱、大涝各一年。降水量年内分配不均匀，春雨、梅雨、秋雨与伏旱、秋冬旱交替，降水最高峰在9月，平均172.4mm，占全年的14%，最高曾