Kanwar Sen, also spelt as Kanwar Sain OBE (1899–1979) was an eminent civil engineer from Rajasthan state in India. He was the Chief Engineer in the Bikaner state who came up with idea of Rajasthan Canal .He successfully implemented Gang canal project too. He was considered a doyen of irrigation engineering of his time. He was born in 1899 in Tohana in Hisar district (Haryana). He was educated at D.A.V. College, Lahore.He graduated as a civil engineer from Thomason College of Civil Engineering, Roorkee (now, IIT Roorkee) in the year 1927 with hons. He was awarded Padma Bhushan in 1956. He has written a book called -Reminiscences of an engineer. He was chairman of Central Water and Power Commission, Ministry of Irrigation and Power, Government of India. Kanwar sain and Karpov (1967) presented enveloping curves for Indian rivers.
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