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 /s, and it was predicted to increase to /s in 2020 [1]. The average drainage coefficient for the year from 2010 to 2020 will be l/s per hectar, three and a haft time higher than the average drainage coefficient for the period from 1954 to 1973; times higher than 1973 to 1976 and 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 of drainage. The out come shows that the drainage demand seems to be impacted by subjective factors rather than objective ones. | Objective and subjective factors influence on demand of drainage by pumping Red River Delta VNU Journal of Science, Earth Sciences 26 (2010) 121-127 Objective and Subjective Factors Influence on Demand of Drainage by Pumping in Red River Delta Dang Ngoc Hanh* Vietnam Academy for Water Resources Received 22 October 2010; received in revised form 19 November 2010 Abstract. 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 , and it was predicted to increase to in 2020 [1]. The average drainage coefficient for the year from 2010 to 2020 will be l/s per hectar, three and a haft time higher than the average drainage coefficient for the period from 1954 to 1973; times higher than 1973 to 1976 and 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 of drainage. The out come shows that the draingae demand seems to be impacted by subjective factors rather than objective ones. 1. Introduction∗ Resources Planning shows that the drainage requirement area for 2010 based on sustainable Since 1954 Government had paid a lot of senerior is 1,116,559 hectar [1]. Of which attention on drainage in Red river delta. This drainage by pump serves for 731,432 hectars attention has increased recently. The scale of (taking approximatly 63%) and gravity drainage drainage struture very much depends on takes 435,127 hectars (taking 37%). drainage coefficient which is calculated based on drainage unit on area unit (l/s-ha). Through Based on the drainage requirement, water resources planning, the drainage Ministry of Agriculture and Rural Development coefficient has been increased, from 1954 to (MARD) issued the list of .
