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首页> 外文会议>NATO Advanced Research Workshop on Enhancing Urban Environment: Environmental Upgrading of Municipal Pollution Control Facilities and Restoration of Urban Waters; 20031106-09; Rome(IT) >URBAN WATER AND CLIMATE CHANGE
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URBAN WATER AND CLIMATE CHANGE

机译：城市水与气候变化

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摘要

In the past, according to a consolidated policy of managing urban activities, the extreme hydrological events were considered mostly with respect to their emergency nature. Particularly in the case of floods, more attention was given to remedies than to prediction and mitigation of the effects. In the case of drought or persistent dry weather, many points still need appropriate investigation. A shortage of water not only requires the -responsible authority to provide other water supplies to the citizens, but also to deal with predominant sanitary and environmental aspects that were normally considered of lower priority. To meet correctly the requirements for which an urban drainage network is designed and constructed, an accurate hydrological analysis is necessary. The calculation of the maximum flow to be conveyed requires the evaluation of some extreme events that probably were not known and conceivable a few decades ago, but are now more and more frequent. They follow a climate trend that is confirmed by the last records and seems to continue in the next future. If the removal of the maximum flow is the main objective for constructing an urban drainage network, the occurrence of long dry periods, which is characteristic more and more for the current hydrologic regime, must also be taken into consideration. Even though the effects appear less dangerous at first glance, the shortage of rainfall can give rise to some negative outcomes, which cannot be neglected for the correct operation of the sewer systems.A thorough maintenance is essential for keeping the drainage network in good running order, with adequate measures in terms of manpower and financial resources.As an ultimate consideration, it is very opportune to recommend that the people responsible for designing and running the network should perform an accurate monitoring activity in order to provide the information, in terms of hydrology and water quality, necessary for the correct functioning of the network.
机译：过去，根据一项管理城市活动的综合政策，极端水文事件主要被视为紧急事件。特别是在洪水的情况下，对补救措施的关注超过了对影响的预测和缓解。在干旱或持续干旱的情况下，许多地方仍需要适当调查。缺水不仅需要负责的机构向公民提供其他水源，而且还需要处理通常被认为不那么优先的主要卫生和环境问题。为了正确满足设计和建造城市排水网络的要求，必须进行准确的水文分析。计算要输送的最大流量需要对一些极端事件进行评估，这些事件可能在几十年前是未知的和可想象的，但现在越来越频繁。他们遵循的气候趋势已被最近的记录所证实，并且在未来的将来似乎还会继续。如果最大流量的去除是构建城市排水管网的主要目标，那么也必须考虑长期干旱的发生，这对于当前的水文状况越来越具有特征。尽管乍一看效果似乎不太危险，但雨水不足可能会带来一些负面后果，这对于下水道系统的正常运行是不可忽视的。彻底维护对保持排水网络良好运行至关重要最终考虑，建议负责设计和运行网络的人员应该进行准确的监控活动，以便提供有关水文方面的信息，这是一个非常恰当的选择和水质，这是网络正常运行所必需的。

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