Environmental & Engineering Geoscience最新文献_第6页

Dependenceof concentration of radon on environmental parameters 氡浓度对环境参数的依赖性

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-12-01 DOI: 10.37023/ee.8.1-2.3

Anita Ptiček Siročić, S. Kovač, D. Stanko, Iva Pejak

{"title":"Dependence\u0000of concentration of radon on environmental parameters","authors":"Anita Ptiček Siročić, S. Kovač, D. Stanko, Iva Pejak","doi":"10.37023/ee.8.1-2.3","DOIUrl":"https://doi.org/10.37023/ee.8.1-2.3","url":null,"abstract":"Radon (222Ra) is a colourless and odourless natural radioactive element in gaseous state. The concentration of radon in the air is usually low, but it can be very high inside of a living space, because of its possibility to penetrate from a foundation soil over a basement into a building itself. People are daily exposed to a certain concentration of radon that is found in soil, water, air and food. This paper shows a correlation analysis of environmental parameters by using the model of multiple regressions. It defines certain statistical relations between environmental parameters such as temperature, humidity, and atmospheric pressure with measured values of radon concentrations. Measurements were carried out at several locations in various residential buildings in north-western Croatia. The results indicated that individual environmental parameters and radon concentration at individual locations were connected. For example, at one location the concentration of radon was decreasing if atmospheric pressure was increasing. Measurements at another location indicated that the concentration of radon was increasing if air humidity was increasing. Due to large number of different parameters affecting the concentration of radon in residential buildings, a satisfactory statistical model to predict the concentration of radon with environmental parameters is not easy to achieve since it was observed variability of radon concentrations with environmental parameters within different local sites. It is necessary to consider a longer period to determine with certainty a mathematical model that would give the most accurate prediction of radon concentration dependence on environmental parameters which can affect human health and quality of life.","PeriodicalId":50518,"journal":{"name":"Environmental & Engineering Geoscience","volume":"81 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75742945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Composting offine fraction after mechanical-biological treatment of municipal solid waste 城市生活垃圾经机械-生物处理后的脱碱馏分堆肥

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-12-01 DOI: 10.37023/ee.8.1-2.9

Aleksandra Anić Vučinić, Valentina Tuk, Snježana Šimunić, Ivana Presečki

{"title":"Composting of\u0000fine fraction after mechanical-biological treatment of municipal solid waste","authors":"Aleksandra Anić Vučinić, Valentina Tuk, Snježana Šimunić, Ivana Presečki","doi":"10.37023/ee.8.1-2.9","DOIUrl":"https://doi.org/10.37023/ee.8.1-2.9","url":null,"abstract":"One of most common types of municipal solid waste treatment is mechanical-biological treatment (MBT), which in practice has many variations depending on the method of conducting the technological process and it is possible to get different output fractions. In this paper is analysed waste generated after the MBT with biodrying, where waste after mechanical treatment undergoes process of biodrying, and then is RDF (recovery derived fuel) separated. Fine fraction remains with a high content of organic matter that without additional processing cannot be disposed of on a landfill.\u0000The aim of this research was to determine the possibility of fine fraction composting in different conditions – in the open, in the open and covered area, and indoors. In each area are formed three compost piles: 100% fine fraction (KH1, KH4, and KH7), 70% fine fraction and 30% wood chips (KH2, KH5, and KH8), 50% fine fraction and 50% wood chips (KH3, KH6, and KH9). Moisture content, temperature and dissolved organic carbon (DOC) were monitored.\u0000Results show that after 13 weeks samples KH1, KH4, and KH7 (100% content of fine fractions) did not achieve DOC value less than 3 000 mg/l. The most effective composting in terms of reducing the DOC is achieved in samples KH3, KH6, KH9.\u0000Based on results obtained, it can be concluded that by adding wood chips in fine fraction in ratio 50:50, the most effective and fastest reduction of organic matter is achieved in the analysed samples.","PeriodicalId":50518,"journal":{"name":"Environmental & Engineering Geoscience","volume":"45 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84323366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence ofleachates on geotehnical and geochemical properties of termite mound soils 渗滤液对白蚁丘土岩土力学和地球化学性质的影响

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-12-01 DOI: 10.37023/ee.8.1-2.4

A. Adekunle, F. Nkeshita, Adetayo Akinsanya

{"title":"Influence of\u0000leachates on geotehnical and geochemical properties of termite mound soils","authors":"A. Adekunle, F. Nkeshita, Adetayo Akinsanya","doi":"10.37023/ee.8.1-2.4","DOIUrl":"https://doi.org/10.37023/ee.8.1-2.4","url":null,"abstract":"This\u0000study investigated the influence of leachate prepared from Telfairia\u0000occidentalis on the geotechnical and geochemical properties of termite mound\u0000soil obtained from the premises of the federal university of agriculture,\u0000Abeokuta, south-western Nigeria. The termite mound soil samples were collected\u0000from three different locations and each sample collected was contaminated by\u0000mixing with leachates in percentage increments of 0% 10%, 15% and 20% of dry\u0000weight of the air-dried soil. The soil samples were subjected to Atterberg\u0000limits and hydraulic conductivity tests for geotechnical observation and X-ray\u0000fluorescence tests for geochemical tests. The range of values for the\u0000geotechnical analyses were obtained as; plastic limit (9.1% – 14.2%), liquid\u0000limit (28.6 % – 61%), plasticity index ((18.2% – 49.5%) and hydraulic\u0000conductivity (1.85 – 4.1 x 10-8) cm/sec) with a resultant reduction\u0000in the plastic limit, liquid limit and plasticity index values but an increase\u0000in the hydraulic conductivity of the samples as the leachate concentration\u0000increased. The results from X-ray fluorescence analyses after 20% leachate\u0000contamination showed that the major elemental chemical composition for the\u0000three samples were comprised of SiO2 (56.25 – 56.5%), Al2O3\u0000(28.42 – 28.50%), Fe2O3 (4.46 – 6.5%), TiO2\u0000(1.08 – 1.23%), CaO (1.45 – 1.60%), P2O5 (0 – 0.04%), K2O\u0000(0.9 – 6.1%) and MnO (0.02 – 4.7%). There was a marginal alteration of the\u0000indices with the values inferring the presence of a minimum composition of\u0000feldspar and a major composition of quartz-rich minerals and thus lending more\u0000credence to the presence of silicates as shown from the X-ray fluorescence\u0000results. It also infers that the termite mounds are predominantly made from\u0000sand materials. The termite soil samples obtained from the aforementioned\u0000locations may not be suitable for engineering works unless stabilization\u0000procedure is adopted.","PeriodicalId":50518,"journal":{"name":"Environmental & Engineering Geoscience","volume":"115 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79024533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Indoor airquality in a high school classroom in Rijeka, Croatia (sick classrooms caused by rising CO2 levels) 克罗地亚里耶卡一所高中教室的室内空气质量(二氧化碳浓度上升导致教室生病)

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-12-01 DOI: 10.37023/ee.8.1-2.1

Tatjana Ivošević, Patricija Nikolaus, Tatjana Pranjić-Petrović, I. Orlić

{"title":"Indoor air\u0000quality in a high school classroom in Rijeka, Croatia (sick classrooms caused by rising CO2 levels)","authors":"Tatjana Ivošević, Patricija Nikolaus, Tatjana Pranjić-Petrović, I. Orlić","doi":"10.37023/ee.8.1-2.1","DOIUrl":"https://doi.org/10.37023/ee.8.1-2.1","url":null,"abstract":"School’s indoor air quality (IAQ) is very important as it can affect student’s learning abilities and lead to health issues. Therefore, indoor air quality, and in particular the CO2 concentration, was monitored on a daily basis from mid-November till the end of December 2017, by using several low-cost instruments. The measuring was performed in the physics classroom of a grammar school in Rijeka, Croatia. Detailed CO2 generation rates, air exchange rates, and ventilation rates are calculated and reported in this work, from the experimentally obtained data. Very high concentrations of over 4.000 ppm were recorded, indicating that ventilation rates are far below 5 Ls-1 per person, which is the lowest recommended value of ventilation rate according to the European standard EN 13779. The experimentally obtained data are compared with the theoretical models and a strong correlation are achieved. This is one of the first comprehensive studies of this kind in Croatia; therefore, we hope that it will stimulate interest between health workers, scientists, and school management to implement indoor air quality monitoring practices and perhaps introduce automated ventilation systems in classrooms for the benefit of students’ health and their learning abilities.","PeriodicalId":50518,"journal":{"name":"Environmental & Engineering Geoscience","volume":"11 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88116113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Multi-objectiveoptimization of retaining wall using genetic algorithm 基于遗传算法的挡土墙多目标优化

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-12-01 DOI: 10.37023/ee.8.1-2.8

Filip Dodigović, K. Ivandić, Jasmin Jug, Krešimir Agnezović

引用次数: 2

Spatiotemporal Evaluation of Flood Potential Indices for Watershed Flood Prediction in the Mississippi River Basin, USA 美国密西西比河流域洪水预测潜力指数的时空评价

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-08-01 DOI: 10.2113/EEG-D-20-00056

Dorcas Idowu, Wendy Zhou

引用次数: 3

An Integrated InSAR-Borehole Inclinometer-Numerical Modeling Approach to the Assessment of a Slow-Moving Landslide 基于insar -钻孔测斜仪-数值模拟的缓动滑坡综合评价方法

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-06-04 DOI: 10.2113/EEG-D-20-00109

M. Francioni, D. Stead, J. Sharma, J. Clague, M. Brideau

{"title":"An Integrated InSAR-Borehole Inclinometer-Numerical Modeling Approach to the Assessment of a Slow-Moving Landslide","authors":"M. Francioni, D. Stead, J. Sharma, J. Clague, M. Brideau","doi":"10.2113/EEG-D-20-00109","DOIUrl":"https://doi.org/10.2113/EEG-D-20-00109","url":null,"abstract":"\u0000 We use results of satellite-based interferometric synthetic aperture radar, Global Positioning System, and borehole inclinometer data to constrain numerical models that improve understanding of slope deformation at the Alexandria landslide, British Columbia, Canada. Surface monitoring data and borehole slope inclinometer measurements provide important insight into the slope failure mechanism. We initially analyzed the data in a geographic information system (GIS) to create thematic maps of the landslide area (hillshade, slope, and aspect), to identify key geological features, and to produce an engineering geomorphology map of the landslide. The monitoring data and the geological/engineering geomorphological models provide important constraints for two-dimensional landslide limit equilibrium and finite difference analyses. The initial limit equilibrium analysis improved understanding of the sliding surfaces. The finite difference models were then used to simulate and investigate the potential slope deformation mechanism. The combined slope monitoring/modeling results show that the Alexandria landslide is a slow-moving, multiple-block, retrogressive slope failure. The close agreement between the limit equilibrium and finite difference analyses, together with the satellite and ground-based slope monitoring and GIS data, highlight the importance of using a multidisciplinary/integrated approach in landslide studies.","PeriodicalId":50518,"journal":{"name":"Environmental & Engineering Geoscience","volume":"27 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82311365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Re-evaluation of the 1941 Rock Slide at Brilliant Cut, Pittsburgh, Pennsylvania 重新评估1941年在宾夕法尼亚州匹兹堡的Brilliant Cut的岩石滑坡

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-06-04 DOI: 10.2113/EEG-D-20-00076

J. Hamel

{"title":"Re-evaluation of the 1941 Rock Slide at Brilliant Cut, Pittsburgh, Pennsylvania","authors":"J. Hamel","doi":"10.2113/EEG-D-20-00076","DOIUrl":"https://doi.org/10.2113/EEG-D-20-00076","url":null,"abstract":"\u0000 On March 20, 1941, more than 110,000 yd3 (84,000 m3) of rock slumped from Brilliant Cut in Pittsburgh, Pennsylvania. Failure was triggered by water pressure buildup due to ice blockage of drainage outlets on the slope face. I investigated this slide as part of my Ph.D. research at the University of Pittsburgh in 1968–1969 and have continued to study it. Historical photographs discovered in 1997 provided new insights on the construction and failure of Brilliant Cut and led to this re-evaluation. In this paper, my 1968–1969 work is summarized and then additional geological and historical information is presented along with key observations from the historical photographs. These photographs reveal that slope excavation at Brilliant Cut in 1930–1931 removed lateral support, in turn initiating stress release and progressive failure that loosened or broke bedrock adjacent to the cut. This fractured rock mass remained marginally stable for a decade but then collapsed in March 1941. The 1941 failure was triggered by water held back in rock fractures by a frozen crust over talus and fractured rock on the slope face. A progressive failure mechanism by Brooker and Peck explains the behavior of Brilliant Cut from 1931 to 1941. Sliding Block stability analyses demonstrate the mechanism of progressive failure and suggest that friction angles were reduced gradually to near-residual values along the failure surface, with low water levels in the slope. With drainage blocked in 1941, a water level developed about 30 ft (9 m) above the basal failure surface to initiate the catastrophic failure. This water level is below that previously inferred to have existed at the time of failure.","PeriodicalId":50518,"journal":{"name":"Environmental & Engineering Geoscience","volume":"48 15 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80082178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Installation of Utility Trench Wells Using Vacuum Techniques for Urban Groundwater Investigation 利用真空技术安装公用沟井用于城市地下水调查

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-05-13 DOI: 10.2113/EEG-D-20-00131

N. Schmidt, M. Shepley

引用次数: 1

Introduction to Special Issue on Debris Flows-Part 2 泥石流特刊简介-第二部分

IF 0.9 4区工程技术

Environmental & Engineering Geoscience Pub Date : 2021-05-01 DOI: 10.2113/GSEEGEOSCI.27.2.151

P. Santi, L. Schaefer

引用次数: 0