水利科学是研究如何利用水、兴水利、除水害的科学。水是人类赖以生存和生产的要素,是国家的重要资源,也是促进和制约国民经济发展的重要因素。我国水利和水能资源丰富,河流多、水面广,流域面积在1000平方公里以上的河流就有1500多条,全国江河多年平均年径流总量为27115亿立方米,居世界第六位,全国水能蕴藏量为6.76亿千瓦,居世界第一位。全 Water science is to study how to use water, water, water except science. Water is an essential element for the survival and production of mankind, an important resource for the country and an important factor for promoting and restricting the development of the national economy. China has abundant water conservancy and hydropower resources. There are over 1,500 rivers with a large area of ​​more than 1,000 square kilometers and a river area of ​​more than 1,500 square kilometers. The total average annual runoff of rivers and lakes in the country is 2.7115 trillion cubic meters, ranking the 6th in the world. Water reserves of 676 million kilowatts, ranking first in the world. all