| 英文摘要 |
The purpose of this one-year project is to screen and evaluate the high-pollutant-tolerant native tree species for science industrial parks in Taiwan. There are six major tasks in this project: (1) To review all the literatures related with high-pollutant-tolerant native trees in science industrial parks; (2) Using dispersion model to investigate the dispersion patterns of major air pollutants emitted from science industrial parks, and evaluate the air-cleaning efficiency by surrounding trees; (3) To investigate the high-pollutant-tolerant native tree species in science industrial parks basing on dispersion patterns of major air pollutants; (4) To measure the pollutant uptake rates and stress tolerances of major native tree species in science industrial parks with instruments, (5) Comprehensively evaluatiing and grading all the high-pollutant-tolerant native tree species in science industrial parks for future application; (6) To investigate the high-stress-tolerant native tree species in harmful or hazardous areas. The measurements of pollutant (including HF、HCl、C2HCl3、PM2.5) uptake rates by at least 10 native tree species were conducted in bag branch enclosure chamber. After a preliminary field investigation around Hsinchu Science Park, a total of 17 native tree species were selected and listed for detail measurements of pollutant uptake rates and stress tolerance. They are camphor tree, autumn maple tree, Formosan ash, Taiwan zelkova, China berry, Chinese pistache, flame gold-rain tree, marabutan, golden-leaf fig, Indian almond, linden hibiscus, silvery messerschmidia, paper mulberry, Ceylon ardisia, Formosan date palm, and edible green bamboo. The ISCST3 dispersion model is applied for studying the dispersion patterns of air pollutants emitted from science industrial parks, including that of HF from 235 stacks, that of HCl from 219 stacks, and that of particles from 21 stacks. Also the dispersion from single stack emitting HF, HCl, and particle were studied. Thereafter the deposition velocities of native tree species against each air pollutant were used to multiply the predicted ambient air concentration to produce the air-cleaning efficiency patterns for all the three pollutants from a single stack. The tolerance of native tree species to sea salt, high humidity, flooding, high BOD, drought, and strong wind with salt spray were also tested. The pollutant uptake rates of 17 native tree species against 4 pollutants (HF, HCl, C2HCl3 and PM2.5) were measured. Four typical native trees were selected for measuring and comparing the uptake rates of mixed 4 pollutants with that of single pollutant. Basically there was no significant difference between the mixed set with single ones. The above results are used to generally evaluate the performance of 17 native tree species for growing and deploying in science industrial park. These results will be useful for greening department to choose the better native trees to plant in industrial parks in the future. Therefore, the air and environmental quality can also be upgraded in the future.
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