有限的水资源,忽多忽少、忽早忽晚的降水,日益增长的需水要求,使用过程中的巨大浪费,加之污染减少了可用水源,造成全世界各地的水荒。我国缺水的类型有三种:资源型缺水,水质型缺水,工程型缺水。具体到一个缺水地区,情况就复杂了,有水资源不足的,有水污染缺水的,也有供水工程不足缺水的,还有多种情况都存在的。 Limited water resources, sudden and neglected rainfall, sudden and sudden precipitation, increasing demand for water and huge waste during use, combined with pollution reduced available water sources and caused water shortages all over the world. There are three types of water scarcity in our country: resource-based water scarcity, water scarcity, engineering scarcity. Specific to a water-scarce region, the situation is complicated, there are inadequate water resources, water pollution, lack of water, there are inadequate water supply shortage of water, there are many situations exist.