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建坝拦水是人类生存的需要人类的生活和生产活动离不开淡水,早期的人们都是依河流、湖泊而居。陆地上的淡水主要是降雨带来的,在地域和时间上分布是不均匀的。堆土成坝、拦蓄雨水是人类生存的自然选择。实际上,在自然界中,天然的“拦
Dam construction is the need of human survival. Human life and production activities are inseparable from the fresh water, early people are based on rivers and lakes. Fresh water on land is mainly caused by rainfall and is unevenly distributed in time and area. Dump earth damming, rainwater storage is a natural choice for human survival. In fact, in nature, natural ”bar