人们常说的大坝一般指河床上的挡水建筑物,主要用来拦截江河,形成水库或抬高水位,为发电、防洪、灌溉、供水、航运等提供条件,是水电工程枢纽建筑物的重要组成部分,对上下游沿岸人民生命财产安全至关重要.下面我们就一起来了解有关大坝的知识.为什么要建大坝人类的生活和生产离不开淡水,早期的人们都是依河流、湖泊而居,然而陆地上的淡水主要是依靠降 Dams, often referred to as dams, generally refer to water retaining structures on riverbeds. They are mainly used to intercept rivers, form reservoirs or raise water levels, and provide conditions for power generation, flood control, irrigation, water supply, and shipping. These are dams for hydropower projects. The important components are of vital importance to the safety of life and property of the people along the upper and lower reaches. Here we come together to understand the knowledge of the dam. Why build a dam Human life and production are inseparable from fresh water, and early people depend on rivers. , and lakes, but freshwater on land mainly depends on