按联合国的标准，目前，我国的人均水资源占有量已接近中度缺水标准，到21世纪上半叶将接近重缺水标准。北方水资源短缺形势将更加严峻。大西线调水工程对于解决我国现代化过程中水资源这一基本短线约束，有着举足轻重的作用。也是西部大开发的重要前提。大西线调水，从勘测论证、规划、设计、施工至完成，恐怕要相当长的时间。历史留给我们的时间已经不多了。 According to the United Nations standards, at present, China’s per capita water resource share is close to the moderate water shortage standard, and by the first half of the 21st century will be close to the water shortage standard. The situation of water shortage in the north will be more severe. The Great Western Water Transfer Project plays a decisive role in solving the basic short-term constraint of water resources in the process of modernization in our country. It is also an important precondition for the development of the western region. Water transfer from the Greater Western Line, from survey and demonstration, planning, design, construction to completion, I am afraid it takes a long time. History has left us little time.