对10个省区百余座输水建筑物运行情况调查结果表明，“老当益壮”和“未老先衰”的建筑物同时并存，凡“未老先衰”者均属非正常老化，主要是设计不慎、施工不良、管理不善等原因造成．只要精心设计、认真施工、妥善管理，钢筋混凝土渡槽的正常运行年限可在百年以上，钢丝网渡槽的正常运行年限也应数倍于目前一般的实际运行年限． The survey of the operation of more than 100 water conveyance structures in 10 provinces and autonomous regions shows that buildings that are “old and prosperous” and “not old and decay first” coexist at the same time, and those who are “not yet old and decay bad” are all abnormally aged, mainly Careless design, poor construction, poor management and other reasons. As long as careful design, serious construction, proper management, the normal operation of reinforced concrete aqueduct can be more than a century, the normal operation of the wire mesh aqueduct should be several times the current actual operating life.