Prediction of groundwater inflow into copper mines of the Lubin Głogów Copper District     

T. Bocheńska  J. Fiszer  M. Kalisz 《Environmental Geology》2000,39(6):587-594

 The Lubin Głogów copper district (lgom) is in an area of copper mining, where ore is mined at a depth of 600–1200 m below surface. Mine dewatering directly influences W-1 limestone aquifer of Permian (Zechstein) age and indirectly impacts a Triassic sandstone aquifer as well as water-bearing sediments interbeded with the coals. The prediction of groundwater inflow into mines has been performed using methods of mathematical modelling. In succeeding steps of the approach, the scheme of the hydrogeological framework was changed starting from the one-layer model up to the four-layer model. The evolution of this hydrogeological schematization is presented in this paper. The latest scheme characterizes such levels of details that allows the following predictions: (1) expansion of depression in all aquifers is influenced by dewatering, (2) the widest extent of depression is in the southern direction, (3) groundwater inflow to the Lubin and Rudna mines will remain at the same level, while the inflow to the Polkowice mine will increase by 25%. Reliable prediction can be achieved by incorporating the entire recharge and drainage area characteristics of the aquifer influenced by mine dewatering into the model. Received: 7 March 1998 · Accepted: 7 December 1998  相似文献   

Contamination of tsunami sediments in a coastal zone inundated by the 26 December 2004 tsunami in Thailand     

Witold Szczuciński  Przemysław Niedzielski  Grzegorz Rachlewicz  Tadeusz Sobczyński  Anetta Zioła  Artur Kowalski  Stanisław Lorenc  Jerzy Siepak 《Environmental Geology》2005,49(2):321-331

Tsunami sediments deposited in a coastal zone of Thailand by the 26 December 2004 tsunami wave were sampled within 50 days after the event. All surface and ground waters in tsunami- inundated zone revealed significant salinity at that time. The tsunami sediments, composed mainly of fine to medium sand, contain significantly elevated contents of salts (Na⁺, K⁺, Ca⁺², Mg⁺², Cl and SO ₄ ⁻² ) in water-soluble fraction, and of Cd, Cu, Zn, Pb in the bioavailable fraction and As in the exchangeable fraction in relation to the reference sample. The origin of contaminants is marine, as well as litho- and anthropogenic. The salts and Pb, Zn and Cu reveal high correlation to each other and to the mean grain size (pore size and porosity). Serious environmental hazard exists in that region because, due to gentle morphology, there is a risk of migration of the contaminants into ground waters and food chain.  相似文献   

三清山——中国的隐秘财宝          下载免费PDF全文

Piotr MIGON 《地质论评》2007,53(B08):233-234

三清山地块地处中国东南部，具有独特的高山地貌，并以其特殊的群峰地貌而著称。基岩由白垩纪花岗岩侵入体组成。大规模发育的垂直节理导致形成高大的圆锥状的山峰、石塔、石柱和陡坡、峭壁，高度可达300m。山峰之间的峡谷和裂缝发育于强断裂带。巨大的高差形成了垂直地域植被分带。三清山具备国家公园和地质公园的条件。现在，正在努力把三清山向联合国教科文组织提名为世界遗产。  相似文献   

Buchbesprechungen     

J. Siemińska  Dr. H. E. Vogel  P. Duerst  A. Hörler  R. Koblet 《Aquatic Sciences - Research Across Boundaries》1970,32(2):591-599

Ohne Zusammenfassung  相似文献   

Chemistry of Neutral and Alkaline Waters with Low Al<Superscript>3+</Superscript> Activity Against Hydroxyaluminosilicate HAS<Subscript>B</Subscript> Solubility. The Evidence from Ground and Surface Waters of the Sudetes Mts. (SW Poland)     

Dariusz Dobrzyński 《Aquatic Geochemistry》2007,13(3):197-210

A wide set of aqueous chemistry data (574 water analyses) from natural environments has been used to testify and validate of the solubility of synthetic hydroxyaluminosilicate (HAS_B)_, Al₂Si₂O₅(OH)₄. The ground and surface waters represent regolith and/or fissure aquifers in various (magmatic, sedimentary and metamorphic) bedrocks in the Sudetes Mts. (SW Poland). The solubility of HAS_B in natural waters was calculated using the method proposed by Schneider et al. (Polyhedron 23:3185–3191, 2004). Results confirm usefulness and validity of this method. The HAS_B solubility obtained from the field data (logK_sp = −44.7 ± 0.58) is lower than it was estimated (logK_sp = −40.6 ± 0.15) experimentally (Schneider et al. Polyhedron 23:3185–3191, 2004). In the waters studied the equilibrium with HAS_B is maintained at pH above 6.7 and at [Al³⁺] ≤ 10⁻¹⁰. Silicon activity (log[H₄SiO₄]) ranges between −4.2 and −3.4. Due to the calculation method used, the K_sp mentioned above cannot be considered as a classical solubility constant. However, it can be used in the interpretation of aluminium solubility in natural waters. The HAS_B has solubility lower than amorphous Al(OH)₃, and higher than proto-imogolite. From water samples that are in equilibrium with respect to HAS_B, the solubility product described by the reaction, is calculated to be logK_sp = 14.0 (±0.7) at 7°C.  相似文献   

Housing inequalities in Bucharest: shallow changes in hesitant transition     

Michael Gentile  Szymon Marcińczak 《GeoJournal》2014,79(4):449-465

Much has been said, yet little remains known, about the impacts of the changes associated with post-socialist transition on housing inequalities in metropolitan Central and Eastern Europe. To some extent, this depends on the scarcity of ‘hard evidence’ about the socialist epoch against which the subsequent developments may be gauged. Based on a case study of Bucharest, the Romanian capital and one of the region’s major cities, this study investigates various lines of housing inequality using data from a 20 % sample of the national censuses of 1992 and 2002. With only minor changes having taken place since the revolutionary events of late 1989, the year 1992 provides an accurate picture of the housing inequalities inherited from the socialist epoch, whereas the new societal order had largely been established by 2002. We use linear regression and binary logistic regression modeling to identify the factors that predict living space and level of facilities. The results suggest that the first decade of transition did not exert any major influences on the housing inequalities inherited from socialism, with the exception of notable improvements at the very top of the social pyramid. This finding is at odds with the literature that highlights the (suggested) effects of socio-economic polarization on the residential structure of cities after socialism. However, the results from 1992 indicate that housing was segmented along socio-economic lines already under socialism, and perhaps more so than one would have expected in the light of the literature on housing inequalities during this period.  相似文献