碩士 / 國立屏東科技大學 / 環境工程與科學系所 / 106 / In 2009, Typhoon Morakot caused numerous landslides at the upstream mountainous area of the Kaoping in Taiwan. The heavy rain caused by the typhoon washed soil and rocks downstream, and after the river water evaporated, the debris-flow deposits formed a large bare land on the riverbed. In recent years, river management authorities have attempted to reduce bare riverbed by dredging, covering bare riverbed with straw blankets, and planting Pennisetum alopecuroides; however, these approaches are ineffective because of limited budgets. Ligang Township is one of the areas in Pingtung County that are most affected by siltation caused by torrential rain. Dust is typically emitted from Kaoping from June to October every year, during which the wind velocity of southern wind and of typhoons’ peripheral circulation is increased. During this period, Ligang Township is the first place to be affected by dust emission, which, caused by either southern or northeastern winds, affects residents (including students and teachers) along the west coast of Taiwan. In view of this, this study is very important to explore whether faculty members have enough awareness of river dust, and use questionnaires to collect data to understand teachers' cognitive research on the impact of river dust.
The questionnaire was randomly distributed to teachers of six elementary schools in Ligang Township and 140 valid responses were retrieved. The collected data were analyzed using independent t-test, chi-squared test, one-way ANOVA, and cross analysis. The analysis results are as follows: (a) River dust emission in Ligang was perceived as serious by 52% of the respondents and as very serious by 31% of the respondents. That is, 83% of the respondents in total perceived river dust emission as serious. In addition, 50% of the respondents “are aware” that the dust is emitted from the Gaoping River and that the emission occurs between June and October the most frequently. However, only 43.6% of the respondents are aware that the dust emission occurs only during the season of southern and northeastern winds. (b) A total of 86% of the respondents valued students’ health, comprising 49% of the respondents willing to change classroom location from outdoor to indoor environments and 37% very willing to do so. (c) Male respondents have significantly higher perceptions of river dust pollution, poor air quality, the effect of river dust emission, and the measures to respond to the dust emission than female respondents do. However, the perception differences were nonsignificant between respondents of different ages, working in different schools, and with different educational levels. (d) Male respondents have significantly more information sources regarding river dust emission than female respondents do. (e) The percentage of respondents aged from 41 to 60 years and above who prioritized “river dust pollution” as the top item requiring mitigation is higher than that of respondents aged between 18 and 40 years. Respondents working in schools located at the northern bank of Ligang have higher perception of dust pollution caused by dump trucks than those in schools located at the southern bank. This phenomenon may be attributed to the fact that most of the local quarries are located at the northern bank. This study found that most of the teachers surveyed said that it is not easy to receive information on the dust. It is suggested that the APP software can be developed to improve the effectiveness of early warning notification. The future is undoubtedly one of the directions that the future can move forward.
| Identifer | oai:union.ndltd.org:TW/106NPUS5615033 |
| Date | January 2018 |
| Creators | Lee, Yu-Shun, 李雨順 |
| Contributors | Hsieh, Lien-Te, 謝連德 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 168 |
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