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通常人们在选择建设场地时,首先考虑的问题是夏季汛期能否被水淹没,一般情况下是避开低洼潮湿地区,选择地势较高并且相对干燥的场地上建房。蓄滞洪区是沿江河湖泊的低洼潮湿地区,由于历史的原因人们在此进行了大量的围垦造田,目前我国已有一千多万人生活在这样的地区。尽管蓄滞洪区有围堤围堰挡水,但这种围堤的防洪标准不能超过江河湖泊主堤的防洪标准。因此当发生流域性大洪水时,为保卫大城市与平原地区的安全,部分堤垸仍需牺牲局部利益,进行破堤分洪。 为保障人民生命财产安全,减少经济损失,《蓄
Generally, when people choose a construction site, the first question to consider is whether the flood season can be submerged in water. Generally, it is to avoid low-lying wet areas, and to build houses on sites that are relatively high and relatively dry. Flood storage areas are low-lying wet areas along rivers and lakes. Due to historical reasons, people have conducted a large number of reclamation and land reclamation. At present, more than 10 million people in China live in such areas. Although the flood storage and detention area has dike cofferdam retaining water, the flood control standards for such dike cannot exceed the flood control standards for main embankments of rivers and lakes. Therefore, in the event of flooding in the river basin, in order to protect the security of big cities and plains, some dikes still need to sacrifice local interests and break the banks. To protect the safety of people’s lives and property and reduce economic losses,