Wèi Xiàn 魏峴 (fl. 1208–1242), of Yín County 鄞縣 (Sìmíng / modern Níngbō), was a Southern Sòng official who rose to Cháofèngláng 朝奉郎 and Maritime Trade Superintendent of Fújiàn Circuit (tíjǔ Fújiàn lù shìbó 提舉福建路市舶). He directed the Jiā-dìng-era reconstruction of the Tāshān weir 它山堰 — the Táng Tàihé 7 (833) hydraulic work of Wáng Yuánwěi — and recorded the work in his Sìmíng Tāshān shuǐlì bèilǎn (KR2k0062) in 2 juan, the earliest surviving monograph on any of the four still-functioning ancient Chinese major irrigation systems.