西汉龙首渠是汉武帝时期关中东部著名的水利工程之一,它以“井渠法”的首创而闻名于世,在我国水利史和科技史上占有极其重要的历史地位。1 龙首渠“井渠法”技术蠡测所谓“井渠法”,就是竖井和暗渠相结合的技术方法。它的产生,是人们认识和利用当地地理环境的结果,据文献资料和野外调查表明,龙首渠从今澄城县西南端起,由北向南, The First Drainage Canal in the Western Han Dynasty was one of the famous water conservancy projects in eastern Guanzhong during the Han Dynasty. It was famous for its pioneering “Well Drainage Method” and occupies an extremely important historical position in the history of water conservancy and science and technology in our country. 1 Long Shuntu “Well Drainage Law” technology test The so-called “Well Drainage Law” is the shaft and the culvert of a combination of technical methods. Its production is the result of people’s understanding and utilization of the local geographical environment. According to the literature and the field investigation, it shows that the Longtou Channel starts from the southwest of Chengcheng County in this year, from north to south,