碩士 / 國立成功大學 / 資源工程學系碩博士班 / 97 / Blackfoot Disease (BFD) had occurred seriously in the Budai, Yijhu, Shiuejia, and Beimen townships of Chia-Nan District of Taiwan in the early days.These four townships are the districts of fishpond cultivation domestically in Taiwan. Groundwater becomes the main water supply because of short income in surface water. The problems of over pumping in groundwater may not only result in land subsidence and seawater intrusion but also be harmful to the health of human giving rise to the bioaccumulation via food chain in groundwater with arsenic. This research use Sequential Indicator Simulation (SIS) of Geostatistical method to reproduce the spatial arsenic distribution of groundwater contaminated in the above four townships. At the same time, risk assessment is applied to probe the utilization ratio of using surface and groundwater for fish farming in the range of target cancer risk (TR) especially on the magnitude of 10-4~10-6 orders in association within the 50th、75th and 95th percentage. The results of this study suggest that groundwater management of fishpond cultivation should be recommanded that firstly under the magnitude of 10-6 order of TR by the 50th percentage of the dilution ratio (DR) is 0.7 to 1 in northern Budai and Shiuejia, and is less than 0.5 in Budai and southern Yijhu, secondly under the magnitude of 5×10-6 order of TR by the 75th percentage of the DR is less than 0.5 in southern Budai and Beimen as well as DR is 0.5 to 1 in Yijhu and Shiuejia and lastly under the magnitude of 10-5 order of TR by the 95th percentage of the DR is less than 0.5 in Budai, southern Yijhu and Beimen, as well as the DR is 0.5 to 1 in other area. The TR is too large to use 5×10-5 and 10-4 to be the standard of groundwater management. According to this study, we suggest that proceeding groundwater management of fishpond cultivation under the magnitude of 10-5 order of TR by the 95th percentage of the DR is to achieve the effect of risk assessment, and ensure public health.
| Identifer | oai:union.ndltd.org:TW/097NCKU5397045 |
| Date | January 2009 |
| Creators | Chiao-Miao Liao, 廖皎妙 |
| Contributors | Cheng-Haw Lee, 李振誥 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 81 |
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