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035 _a.b10228160
099 _aAIT Thesis no. EV-79-28
100 1 _aWickramanayake, G. Bandula
245 1 0 _aEffect of rainfall on surface reaeration
260 _aBangkok :
_bAsian Institute of Technology,
_c1979
300 _a86 p.
490 1 _aThesis ;
_vno. EV-79-28
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1979
520 _aIn the present research, experiments have been carried out to study the effect of rainfall on surface reaeration. A statistical analysis of the experimental results has shown that the oxygen transfer coefficient due to rain is directly proportional to the power of the rainfall. In addition, an expression to evaluate the oxygen transfer coefficient, both due to rainfall and mechanical mixing has also been developed. By considering the relationship between the power of a rainfall and rainfall intensity, the empirical formula is modified to correlate the oxygen transfer coefficient and rainfall intensity for natural rains. The experimental results, along with the established relationships, give rise to the conclusion that the transfer coefficient due to the combined effects of rain and mechanical agitation is less than the sum of the transfer coefficients due to the two effects considered separately. The results obtained in this study further explain that the addition of oxygen from oxygen saturated raindrops is an important factor in studies related to surface reaeration.
650 0 _aRain and rainfall
700 1 _aBanks, Robert B.,
_eChairperson
700 1 _aLohani, Bindu N.,
_eCo-Chairperson
700 1 _aNguyen, Cong Thanh,
_eExamination Committee
710 2 _aThe Royal Danish Government,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-79-28
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B22247
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