《新唐书·地理志》山南西道兴州长举县条载:“元和中,节度使严砺自县而西,疏嘉陵江二百里,焚巨石,沃酼以碎之,通漕以馈成州戍兵。”吕思勉《隋唐五代史》、岑仲勉《隋唐史》以及四川人民出版社新近出版的《四川内河航运史》等都沿用这一说法,将严砺疏嘉陵江的时间定在了元和年同。但《新唐书·地理志》所记实有舛误,严砺疏江的时间不 “New Book of Geography” Shannan Xishu Changju county contains: “Yuan and in Jiedushi so rigorously from the county and the West, sparse Jialing River two hundred miles, burned boulders, Wulia to break it, Tong Cao To feed state garrison soldiers. ”Lu Si Mian“ Sui and Tang and Five Dynasties history ”, Cen Zhong Mian“ Sui and Tang Dynasties ”and the Sichuan People’s Publishing House recently published“ History of Inland Shipping in Sichuan ”and so on are to use this argument, will be strict sparse Jialing River Set at the same year and yuan. However, “New Tang Dynasty Geographical Records” has misrepresented errors, strict time sparse river not