PAGEPAGE24摘要本设计包括给水系统、污水系统两部分。给水工程为城市的一个重要基础设施，必须保证以足够的水量、合格的水质、充裕的水压供应生活用水、生产用水和其它用水。给水系统设计步骤：根据最高日用水量变化曲线计算水塔和清水池调节容积；进行管网定线，计算管段设计流量、管径和水头损失；最高时环状网管网平差计算；确定水塔高度和水泵扬程；分别进行不利管段事故时、消防时、最大转输时校核。然后根据上述计算，算出最高时各节点水压，绘制等水压线。排水工程在环境保护、保障人民健康和经济上有重要意义。排水系统根据对生活污水、工业废水和雨水的不同排除方式所形成的排水系统称作排水体制。排水体制一般可分为两种类型：合流制和分流制。本设计根据当地地形特点和经济状况，采用雨水、污水分流制。设计步骤：分别对污水和雨水系统进行管网定线；然后根据各自汇水面积计算管段流量；确定管径、坡度及埋深，最后根据计算结果绘制污水管道纵断面图。关键词：设计流量，给水系统，排水系统，雨水系统，管网定线ABSTRACTThedesignincludeswatersupplysystems,sewerageintwoparts.Watersupplyprojectforurban,industrialasanimportantinfrastructure,theneedtoensureasufficientquantityofqualifiedwater,amplesupplyofwaterpressure,waterandotherproductionwater.Watersystemdesignsteps,Accordingtothemaximumdailywaterdemandcurvecalculationofthetowersandadjustvolume-pool.Networkforalignmentofthecalculationofthedesignflow,diameterandheadloss.RingNetworkatthehighestnetadjustmentcalculation;Identifyhightowersandpumpslift.Wereadversepossessionoftheaccident,fire,thebiggesttransferwhenchecking.ThenBasedontheabovecalculations,calculatedatthemaximumnodepressure,drawingwaterpressureline.Drainageprojectsinenvironmentalprotection,protectionofthepeople'shealthandeconomicimportance.Accordingtothedrainagesystemofdomesticsewage,industrialwastewaterandstormwaterdifferentexclusionasaresultofthedrainagesystemknownasthedrainagesystem.Drainagesystemcanbedividedintotwogeneraltypes:Combinedandtriagesystem.Accordingtothedesigncharacteristicsofthelocalterrainandthestateoftheeconomy,useofrainwaterandsewagetriagesystem.Designsteps:Respectivelyofsewageandstormwatersystemsnetworkalignment.Thenaccordingtotheirrespectivecatchmentareaofpipeflow;Determineddiameter,depthandslope,Finally,accordingtotheresultssectionofmapdrawingsewers.KEYWORDS:Designflow，Water-supplySystem,Drainagesystem,Stormwatersystem，Pipenetworkfixed-line第一章设计任务1.1广西省兴业县某地区状况资料1.1.1自然状况1.该镇平均风速4m/s，夏季为3m/s。风向：冬季西北向频率20%；夏季东南向频率26%；年主导风向东南向频率22%。2.大气压力：夏季710mmHg；冬季722mmHg。3.