With the adjustment of industrial structure,many high pollution enterprises will gradually shut down.This process will produce a large number of high-risk pollution plots and cause a series of environmental problems.I...With the adjustment of industrial structure,many high pollution enterprises will gradually shut down.This process will produce a large number of high-risk pollution plots and cause a series of environmental problems.In this study,geophysical detection and direct push technology were applied to investigate soil and groundwater pollution in a typical brownfield in Zhenjiang,Jiangsu province,China.The results showed that Chlorotoluene and its ramification were the main pollutants for the brownfield.Pollution decreased with depth and was quite uneven in the brownfield.Production and wastewater treatment areas were heavily polluted,where volatile organic compounds contaminated and semi-volatile organic compounds were found 12 m and 15 m below the land surface,respectively.About 18880 m3 groundwater was contaminated.This study is significant to develop a geological survey work mode for the postindustrial era.展开更多
In the wake of great expansion of cities as centers of production,the post-industrialization era saw American urban tran-sitions and transformations with cultural diversification highlighting consumption,service,marke...In the wake of great expansion of cities as centers of production,the post-industrialization era saw American urban tran-sitions and transformations with cultural diversification highlighting consumption,service,marketing and cultural integration.Cul-tural variations in cities,under the influence of non-material production,constantly worked for urban re-invention and urban re-newal,facilitating and expediting a high-level urban development.展开更多
提出一种高精度的ZWD模型(tianjin_zwd,TZ)。TZ基于2016-2018年逐小时气压分层的ERA5,欧洲中尺度气象预报中心第五代再分析产品数据,采用BP神经网络建立。然后,根据2019年的ERA5产品导出的ZWD对TZ模型进行了验证。结果表明:相比GPT3模型...提出一种高精度的ZWD模型(tianjin_zwd,TZ)。TZ基于2016-2018年逐小时气压分层的ERA5,欧洲中尺度气象预报中心第五代再分析产品数据,采用BP神经网络建立。然后,根据2019年的ERA5产品导出的ZWD对TZ模型进行了验证。结果表明:相比GPT3模型,TZ模型可提供更贴近真值的ZWD估值;并且,其RMSE由5.0 cm (GPT3)降至4.5 cm,表明10%的精度提升。上述结果表明TZ模型实现了更优的预测性能,该模型的构建策略可为全国其他地区的ZWD建模提供借鉴。展开更多
基金This work was supported financially by“Environmental geological survey of 1:50000 in the demonstration area of Sunan”(DD20160245).
文摘With the adjustment of industrial structure,many high pollution enterprises will gradually shut down.This process will produce a large number of high-risk pollution plots and cause a series of environmental problems.In this study,geophysical detection and direct push technology were applied to investigate soil and groundwater pollution in a typical brownfield in Zhenjiang,Jiangsu province,China.The results showed that Chlorotoluene and its ramification were the main pollutants for the brownfield.Pollution decreased with depth and was quite uneven in the brownfield.Production and wastewater treatment areas were heavily polluted,where volatile organic compounds contaminated and semi-volatile organic compounds were found 12 m and 15 m below the land surface,respectively.About 18880 m3 groundwater was contaminated.This study is significant to develop a geological survey work mode for the postindustrial era.
文摘In the wake of great expansion of cities as centers of production,the post-industrialization era saw American urban tran-sitions and transformations with cultural diversification highlighting consumption,service,marketing and cultural integration.Cul-tural variations in cities,under the influence of non-material production,constantly worked for urban re-invention and urban re-newal,facilitating and expediting a high-level urban development.
文摘提出一种高精度的ZWD模型(tianjin_zwd,TZ)。TZ基于2016-2018年逐小时气压分层的ERA5,欧洲中尺度气象预报中心第五代再分析产品数据,采用BP神经网络建立。然后,根据2019年的ERA5产品导出的ZWD对TZ模型进行了验证。结果表明:相比GPT3模型,TZ模型可提供更贴近真值的ZWD估值;并且,其RMSE由5.0 cm (GPT3)降至4.5 cm,表明10%的精度提升。上述结果表明TZ模型实现了更优的预测性能,该模型的构建策略可为全国其他地区的ZWD建模提供借鉴。
