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我们居住生存的地球和其他星球最主要的区别在于地球上有空气、水和生物,水按其存在的形式有气态水、地表水、地下水,所以地球上的水是一个统一的整体,水利科技工作者研究的水主要是地表水和地下水,也就是水资源的两个重要组成部分。河南省是一个缺水的省份,20世纪50、60年代,淮河以北平原地区地下水位埋深很浅,有80多万公顷的耕地发生盐碱
The main difference between the planet Earth where we live and other planets is that there is air, water and living things on the earth. Water has gaseous water, surface water and groundwater in the form of its existence. Therefore, the water on Earth is a unified whole. Water conservancy technology Workers study mainly surface water and groundwater, which are two important components of water resources. Henan Province is a water-scarce province. In the 1950s and 1960s, the groundwater table in the area north of the Huai River buried very shallow groundwater, and more than 800,000 hectares of arable land were salinized