The demand for newly constructing of drainage pumping station in Red river delta has increased recently. Total drainage volume for the whole region in 2006 was 2406.8m3/s, and it was predicted to increase to 5181.3m3/s in 2020 [1]. The average drainage coefficient for the year from 2010 to 2020 will be 7.0 l/s per hectar, three and a haft time higher than the average drainage coefficient for the period from 1954 to 1973; 1.8 times higher than 1973 to 1976 and 1.3 times higher than 1976 to 2000. This article aims to provide the primary analysis of objective (drainage requirement) and subjective factors (socio-economic condition, psychology, information, etc) influencing on the demand o...
