论文部分内容阅读
地球表面到处有水的踪迹。海洋、湖泊、河流、沼泽和冰川等水体,岩石圈里的土壤水和地下水,生物圈中的生物水,以及大气圈中的大气水分,共同组成了一个庞大的“水圈”,所以人们给地球还冠以“水的行星”这一美称。所有的这些水都可以直接或间接地被人类所利用:供植物生长、航运、发电、水产养殖、工业生产、饮用和娱乐等等,因此,广义地说,所有的水都是极宝贵的自然资源。但是,目前所讲的水资源是一狭义的概念,仅指可供人们经常取用的、在一定时间内能够得到恢复和补充的淡
There are traces of water everywhere on the earth’s surface. Water bodies such as oceans, lakes, rivers, marshes and glaciers, soil water and groundwater in lithosphere, biological water in the biosphere, and atmospheric moisture in the atmosphere make up a vast “hydrosphere,” so people give Earth Also known as “the planet of water” this reputation. All of this water can be used directly or indirectly by mankind: for plant growth, shipping, electricity generation, aquaculture, industrial production, drinking and entertainment, etc. Therefore, in a broad sense, all water is extremely valuable natural Resources. However, the current definition of water resources is a narrow concept, and refers only to those people can often access, within a certain period of time can be restored and supplemented light