| URN | etd-0731109-154505 | Statistics | This thesis had been viewed 832 times. Download 18 times. |
| Author | Chi-tung Yeh | ||
| Author's Email Address | No Public. | ||
| Department | hazards | ||
| Year | 2008 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 83 |
| Title | Coefficient of First-order areal model in Free Surface Flow System for the Reduction of Different Plants |
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| Abstract | The research of this thesis is aimed to first-order areal model in free surface flow system, ten kinds of common wetland plants were carried on researching in this model, by the deriving of background consistency, try to get coefficients of first-order areal model, in order to understand experimental plants for polluted consistency removal ability of enter the flowing water and influence factor. Since four steps are set about for this research. First, on the screening with emerged plants and submerged plants in free surface flow system, gather representative plants and carry on in the experiment, and experimental project referral by water pollution control ACT. Second, utilize the theoretical foundation of sewer to carry on the inference to wetland, analyze pollutant various conversions in the free surface flow system. Third, by the deriving of regression to set the background consistency that inference exists in free surface flow system, and utilize the background consistency to infer the coefficient of first-order areal model among every plant, analyze the reaction between different depth and different HRT of water. Finally, discuss into the influence that other environmental conditions may produce to coefficient of first-order areal model in free surface flow system. The conclusion which can get in this research is as follows: Pass deeply or pass shallow all unfavorable of emerged plants to cut down BOD and TN very much; Positive correlation appears of HRT with coefficient of first-order areal model BOD and TN; There is positive correlation to the degradation of BOD and TN with high temperature in free surface flow system. The achievement of this research can offer the free surface flow system is designed as reference while planning. |
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| Files | indicate access worldwide | ||
| Date of Defense | 2009-06-30 | Date of Submission | 2009-07-31 |