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The pollutant behavior in ground air and its effects on surface air

地面空气污染物行为及其对地表空气的影响

基本信息

批准号：
15340165
负责人：
NIREI Hisashi
金额：
$ 9.34万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340165/
关键词：
Geo-pollution Ground air pollution Geo-pollution diagnosis Stratigraphic units Distribution of stratigraphic units Ground air flow Atmospheric pressure fluctuation Ground air pressure 地質汚染危機管理観測システム産業有害遺棄物処分地地下空気汚染濃度人口地層大地の呼吸 /

项目摘要

Ground air pollution occurs on geo-pollution sites, e.g. waste disposal sites. Transport of gaseous pollutant in ground air induced by ground air flows with atmospheric pressure fluctuation.In order to clarify the transport of pollutant from subsurface in waste disposal sites, it is useful to clear the relationships between the fluctuations of ground air flows and atmospheric pressure previously. As the way to analyze the flows we arranged the pollution observation system consisting of observation wells for the monitoring of ground water table and teflon tubes in each vadose zone for the monitoring of ground air pressure and transport of gaseous pollutant and also set the monitoring apparatus, flow meter of ground air, meter of pressure difference between ground air pressure and atmospheric pressure, barometer and thermometer. As a result, the phenomenon of ground air flow, inflow-outflow, induced by atmospheric pumping, and, has the cycle of short period and the cycle of long period, e.g. typhoon. The former cycle and the later are respectively called the breathing and the deep breathing of land.It was generally recognized that the flows from subsurface increase under low pressure. Furthermore, we could show that the flows increase only in the down trend of the low pressure and stop in the up. The transport of gaseous pollutant will occurs only under the down trend of the low pressure. This report is first stage of the study that will contribute to analyze the behavior of the gaseous pollutant from subsurface.

地面空气污染发生在地质污染场地，例如废物处理场地。大气压力波动下的地面气流引起的气态污染物在地面空气中的输送为了弄清垃圾填埋场地下污染物的输送，首先要弄清地面气流波动与大气压力之间的关系。作为流量分析的手段，我们布置了由地下水位观测威尔斯井和各包气带的地下气压和气态污染物输送监测的蒸发管组成的污染观测系统，并设置了监测仪器、地下空气流量计、地下气压与大气压力差计、气压计和温度计。因此，由大气抽吸作用引起的地面气流的入流-出流现象，有短周期和长周期的循环，如台风。前一个循环和后一个循环分别称为陆地呼吸和深呼吸。此外，我们可以表明，流量只增加在低压的下降趋势，并停止在上升。气态污染物的输送只有在低压下降趋势下才会发生。这份报告是第一阶段的研究，将有助于分析的行为，气态污染物从地下。