Water scarcity is increasing throughout the world due to the effects of increasing groundwater abstraction and climatic change. The present study was undertaken to evaluate groundwater potential zones (GP) in Dhaka city using GIS and remote sensing (RS) techniques. A weighted linear combination (WLC) was used in association with GIS techniques to identify GP zones for an area that encompassed the city

Laser diffraction (LD) is a modern method for determining particle size distribution of soils and sediments. When deciphering particle size distribution, the area under the differential LD-spectrum is determined, limited by the vertical boundaries at the group edges according to the FAO-classification. In fact, there are no real vertical boundaries between the fractions of the particles, and the fractions

This study explored the environmental impact of the large-scale projects, the 3rd Bridge across the Bosphorus and 3rd Airport, carried out in the last decade leading to the massive deterioration of the northern forest area in Istanbul. Destroyed forest area was assessed through relevant changes in land classification detected by multi-temporal Landsat data of Istanbul between 2009 and 2016. The magnitude

Periods with rainfall and rapid snow melting or their simultaneous occurrence are very important for good water quality. Such periods lead to a rapid increase in turbidity as well as the natural organic matter quantity in water. Chlorine as a disinfectant builds the toxic disinfection by-products with the natural organic matter that are harmful to human health. Data monitoring allows the prediction

Chilika lake, the largest brackish water lagoon in Asia, has a unique setting, where the north-eastern part receives freshwater from the terrestrial runoff, and the south-eastern part receives seawater from the Bay of Bengal. The seasonal variability in the quantity of inflowing water and their mixing in the lake controls the mobilization and precipitation of various elements. Seasonal sediment samples

Subsurface geological formation is essential to validate design assumptions for the construction of deep engineering structures, especially in the weathered terrains. The geological formation can be delineated using resistivity values through an electrical survey. However, the subsurface resistivity alone is ambiguous to interpret the subsurface geological units. As part of an ongoing investigation

Zhangzhou geothermal field is one of the highest temperature in southeastern coastal areas in China. Zhangzhou geothermal field is an uplift-fracture type geothermal resource, and there are several deep fractures in the geothermal field, controlling water flow and heat transfer. Presently there is no systematic study of the characteristics of the temperature field, pressure field and water density

The present work evaluated a mercury adsorption from its aqueous solution through chemically enhanced kapok fiber with the self-polymerization of the dopamine (DA) on the surface of the kapok fiber. The adsorption capacity of mercury ions was greatly improved with the DA coated kapok fiber (235.7 mg/g), compared with the raw kapok fiber (39.9 mg/g). The kinetic and isotherm studies were established

Many ejection landslides in the 2008 Wenchuan earthquake exhibited unusually dramatic behaviour in which a huge sliding mass was launched into the air and supported for a long distance because of the aerodynamic effect. In this paper, the formation conditions and movement characteristics of ejection landslides are analysed. The flight behaviour of the centroid of the ejection mass is studied by numerical

In the construction of metro tunnels, water gushing accidents caused by the rupture of underground pipeline often occur, and in loess area, the collapsibility of loess makes this problem more complex and difficult. To investigate the damage of metro tunnel caused by collapsible loess under the action of local dynamic water (gushing water), a model experiment was conducted based on the pipeline water

This paper explored the positive attributes of aerobic membrane bioreactor for recycling and reuse of domestic wastewater for irrigation. For this purpose, performances of two different full-scale treatment plants, one designed as aerobic membrane bioreactor (AMBR) equipped with a hollow fiber membrane with a nominal pore size of 0.03 μm, and the other, as a conventional nitrogen removal activated

The aim of this work is to evaluate the nitrate content and its impact on groundwater quality used for supply in dairy farms in a sector of the Pampas Plain in relation to specific point sources of pollution. Samples were collected in nine dairy farms during the months of June, August and November 2017 and April 2018. In all the samples, electrical conductivity and pH were measured in situ with a portable

Sampling of groundwater and surface water at 33 sites near the Malanjhkhand copper mines in India indicated that elevated concentrations of Cu (15.01 mg/l) and Mn (9.040 mg/l) were locally present in water bodies near the mine sites. Multivariate statistical techniques including principal component analysis, cluster analysis and a Pearson correlation matrix were used to determine the relationships

Groundwater quality can be compromised by its interaction with deep thermal waters. In northern Sardinia, two different deep thermal-water-flow systems have recently been recognized on the basis of thermal and isotopic features. One system (GW) is hosted in deep, mainly granitic, fractured reservoirs with water temperatures of 30–45 °C and Cl–Na hydrofacies. These waters have high fluoride contents

Groundwater vulnerability is normally associated with the potential for contamination, for example the DRASTIC approach, but the increasing importance of groundwater in human, agricultural, and industrial systems, implies that groundwater vulnerability is dependent on a range of other parameters and particularly parameters impacted by climate change. A robust method for evaluating groundwater vulnerability

Northwest Himalaya is one of the seismically active regions that had experienced a number of major and moderate earthquakes in the past. The 4th April 1905 Kangra earthquake (Ms 7.8) is one amongst those which had caused a devastating effect to the built environment, as a consequence of amplification factor due to varied impedance contrast between the overlying alluvial soil and underlying bedrock

Water quality of rivers depends on land use, sediment load, natural hazards such as flooding and drought, water pollution and eutrophication, and multiple use. The water quality management of the Gharasou River in a basin-scale approach was reviewed. Both non-point and point sources were investigated in terms of management, land use, and patterns of land use change, soil erosion and sediment load,

Concentration of nitrates in groundwater at the Nitrate Vulnerable zone of Faro, south Portugal, reaches values as high as 300 mg/l; therefore, according to the EU Water Framework Directive, mitigation measures need to be implemented. A Managed Aquifer Recharge scheme is proposed to accelerate the dilution and natural discharge of nitrates from the system. Source water availability is estimated from

Groningen is the largest onshore gas field under production in Europe. The pressure depletion of the gas field started in 1963. In 1991, the first induced micro-earthquakes have been located at reservoir level with increasing rates in the following decades. Most of these events are of magnitude less than 2.0 and cannot be felt. However, maximum observed magnitudes continuously increased over the years

The transformation of natural Amazonian environments into production systems, mainly related to agriculture and livestock, is considered the most frequent anthropic activity in the region, which can cause significant changes in physical attributes and soil organic carbon. On the other hand, the proper development of the plants depends basically on the quality of the soil, which is directly related

Shenbei district of Shenyang city, Liaoning province, northeast China is a typical urban–rural (peri-urban) fringe of a megacity that is undergoing rapid urban expansion and the intensification of agricultural management, which threatens the quality of shallow groundwater in the area. This study selects proper indices relevant to vulnerability, stress, function, and adaptability based on the results

After almost 200 years of exposure, the monuments of General Scharnhorst and Bülow have been analysed by means of ultrasound. Both sculptures are made of Carrara marble, both sculptures have been exposed to the same environmental influences and both sculptures are, based on the results of the ultrasonic measurements, in alarming conditions. This statement can be made because of the data of three different

The determination and monitoring of deformations that may occur in the benches of dump sites of open-pit mines are important for both security and continuity of mine production. The Global Navigation Satellite System (GNSS) is the most preferred method for deformation monitoring at dump sites. While the amount of deformation (3D displacements) can be determined at the points monitored by the GNSS method

Failure frequency of a dam varies greatly with reservoir water level and time. It is important but difficult to dynamically estimate failure frequency of high concrete faced rockfill dams (CFRDs) merely based on the probabilistic approach due to limited failure cases of high CFRDs. In this study, a new method is developed for dynamically estimating the long-term revolution of seepage failure frequency

Defining the suitable positions for landfill sites on a regional scale is a decision-making procedure based on a number of criteria. In this study, geographic information system analysis and multi criteria decision making method have been utilised to search for spatial suitability of landfill sites by considering legislative, technical, social and environmental criteria. Fourteen exclusion criteria

Distributions of calcareous calthemite deposits have been widely documented, but depositional processes and the architecture of their internal fabrics are not well understood. These concrete degradation products from a case study area in western Canada have external morphologies comparable to calcite speleothems formed in natural limestone caves, but the internal microstructural architecture and mineralogy

Thermal properties of streams and rivers, due to significant impact on biota and other physico-chemical water properties, were broadly recognized in hydrological literature last years. Nevertheless, water temperature of temperate lowland watercourses has received relatively small attention, despite the development of new measurement devices and techniques. Thus, the current study attempt to document

In the investigation of karstic form and underground karst water, determination of the location and geometric properties of karstic conduits and underground watersheds is one of the greatest problems not yet adequately resolved. In the karst terrain of the Yunnan–Guizhou Plateau of China, karst depressions are a product of the formation and evolution of the groundwater system, and the distribution

The distribution of the sixteen priority polycyclic aromatic hydrocarbons (PAHs) in different components of field aged soil was investigated. Furthermore, the desorption and bioaccessibility of high molecular weight (HMW) PAHs with five and six aromatic rings were explored using XAD-2 resin-assisted desorption assay due to their high carcinogenicity, and Fourier Transform Infrared Spectroscopy (FTIR)

Various biological nitrogen removal processes have been developed for energy saving in the municipal wastewater treatment plant (MWTP). Recently, a nitrogen removal method using microalgae is emerging as an innovative method. This study has addressed how much of nitrogen was removed by microalgae and how much of electric energy was saved at the same time. For the verification purpose, a long term operation

Groundwater is an essential and major source of water in semi-arid and arid regions, and thus, determining potential locations for groundwater recharge, via prompt and accurate techniques, is necessary. The aim of the research is finding the best artificial recharge location for injecting the excess surface water into aquifer in Shiraz watershed comparing fuzzy-AHP method and Dempster–Shafer theory

There are many abandoned mines that have completed their economic life in the world and in our country. Because of limited capital power and manpower, it is very difficult to recover all abandoned mines to their pre-mining state. Therefore, environmental problems and their impacts related to abandoned mines are frequently observed. To investigate the impact of the abandoned mercury quarry representing

Ferromanganese oxides, as abundant minerals in natural waters and soils, would affect the transport and fate of vanadium(V) in the environment. The adsorption behaviour of V(V) on synthesized goethite and birnessite under environmental factors including pH, ionic strength, coexisting substances such as anions, cations, and fulvic acid (FA) was investigated by batch experiments. The results indicated

Human intervention has become a globally dominant factor in the morphological evolution of estuary channels in recent decades. This paper analyzes seasonal morphological changes in the Huanghe estuarine channel for a 37-year period from 1976 to 2012 as a measure of estuarine shrinkage and restoration. The results show that the channel underwent four stages of development: enlargement (1976–1985), a

This study discusses the hydrochemical components of glacier snow meltwater using the correlation analysis, factor analysis, enrichment factor, and the Gibbs diagram. Water samples were collected from June to September in 2016 and 2017. The results obtained the monthly changes for anions and cations in Yuzhufeng (YZG) and Jianggudiru Glacier (JGG) were notably, with highest concentration of ions recorded

In western China, artificial freezing is the main effective technology to excavate the deep water-rich strata in mining. The mechanical strength of the frozen wall is the focus of attention in artificial freezing design. Uniaxial compression test was performed on the frozen sandstone samples to investigate the effect of temperature and water content on uniaxial compression strength (UCS); the results

Urbanization processes have caused changes in the runoff behavior, especially by impervious surfaces produced by paving and buildings. Impermeable surfaces prevent the infiltration of rainwater, increasing the volume and speed of runoff. Besides, inadequate urban planning coupled with heavy rains promotes the evolution of erosion processes, especially in peri-urban areas. This research aims to identify

Forecasting the sediment load in a river is difficult due to different parameters viz., heavy rainfall and precipitation, tropical climate, transportation of sediment, and so on. The wavelet transformations model helps to analyze the time and frequency information to estimate sediment load by decomposing data over several phases. Inspired from this idea, based on extreme learning machine (ELM) and

Eastern Herzegovina is highly karstified area, with porosity of karstified rock mass between 0.8 and 2%. It is an area with high precipitation (average annual values in wet year are around 2450 mm), but its distribution is uneven, with 70% of annual precipitation occurring during the wet season (late fall to early spring). The outflow coefficients are very high, between 0.7 and 0.8. The ratio between

This research is aimed at determining suitable areas within Akure metropolis with residual soils of excellent geotechnical properties as landfill liners and with considerable depth to groundwater table, along with other environmental factors, for siting municipal solid waste dumpsite. Field work, soil sampling, and laboratory geotechnical tests were carried out based on standards outlined in British

In many densely populated urban areas, artificial lakes have replaced natural river systems as water sources to provide people with water for living and industrial production. However, groundwater mounding due to seepage from water storage facilities will have an impact on the regional groundwater flow regime. This study investigated the effects of the construction and operation of the Doumen Reservoir

Soil contaminated by potentially toxic trace elements (PTEs) may cause serious deteriorations to the environment and human health. With the aims of PTEs removal and resource reuse in solidification/stabilization technology, the soda residue was adopted as the adsorbent to mix with the soil in this study. The adsorption capacity of the mixture on Pb(II) was investigated by performing a series of adsorption

To control outdoor exposure to natural radiation, assessment of activity concentrations of the radionuclides in soils is substantial. In this paper, the activity concentration of natural radionuclides (226Ra, 232Th, 40K) was estimated for 174 agriculture soil samples using a sodium iodide detector (NaI) of (3” × 3”). Soil samples were collected from seven regions (56 locations) in EL-Minya governorate

The risk management of cascade reservoir systems (CRSs) is a major public challenge, and the establishment of risk criteria is critical to solving this issue. In this paper, an approach is presented to establish risk criteria of for CRSs in China based on statistical data (reservoir dam break accidents; fatalities due to reservoir dam breaks; the construction date of defective reservoirs; and the current

One of the most important challenges in solid waste management throughout the world is selection of suitable landfill sites. It is essential for solid waste management, because unscientific dumping and landfilling of waste could negatively impact the environment and human health. This research presents a GIS-based multi-criteria decision support approach for assessing the suitability analysis for landfill

Temperature is one of the factors which affects the meteorological phenomenon prevailing in an urban area and ultimately leads to climate change and global warming. Measurement of surface temperature with conventional temperature sensors is tedious, has single point value and expensive. Satellite data of 2005, 2008, 2010 and 2016 are used to assess the land use land cover (LULC) and to measure the

Among all the natural disasters, drought has the most catastrophic encroachment on the surrounding and environment. Gulbarga, one of the semi-arid districts of Karnataka state, India receives about 700 mm of average annual rainfall and is drought inclined. In this study, the forecasting of drought for the district has been carried out for a lead time of 1 month and 6 months. The multi-temporal Standardized

Land subsidence occurrence in the Tasuj plane is becoming more frequent and hazardous in the near future due to the water crisis. To mitigate damage caused by land subsidence events, it is necessary to determine the susceptible or prone areas. This study focuses on producing and comparing land subsidence susceptibility map (LSSM) using boosted regression tree (BRT), random forest (RF), and classification

The current work presents an integrated approach to maximize groundwater exploitation under Sahara conditions. The approach includes investigation of palaeohydrology, remote sensing data, field verification and geophysical datasets (gravity, aeromagnetic and geoloelectrical data). Results reveal the existence of palaeohydrologic remarks such as; palaeodriange, terraces, tufas, gorges and alluvial fans

The extra siliceous limestone sample of the Lower Eocene from the abandoned cement quarry part of the limestone deposit from the area of Bizerte (Extreme North East of Tunisia) has been investigated for its suitability for cement making. Petrological as well as X-ray diffraction pattern studies indicated that the limestone sample was crystalline and dominantly composed of calcite and quartz. They have

Geological transition zones (GTZ) have proved to be hydrogeologically problematic, owing to poorly defined basal and lateral contacts between the rocks. Several occurrences of abortive wells in GTZ overtime has necessitated the need to characterise groundwater potential zones (GPZ) in these zones. Attempts have been made to delineate the complex lithological contacts in GTZ using geophysical and geological

This paper presents detrital modes, clay and carbonate cements and major and trace element contents of the sandstones from the lower Xiaganchaigou formation deposited during the Eocene/Oligocene transition in the Lenghu tectonic belt on the northern margin of the Qaidam Basin, NW Qinghai–Tibetan plateau. Our results show that the sandstones are mainly lithic feldspathic, with clay content varying from

The article is devoted to the study of the content of heavy metals and radionuclides in soils of the environments of the Severodvinsk industrial district (Northwest Russia). The city of Severodvinsk is the largest industrial center for the Navy in North-western Russia. Soil samples were taken in the vicinity of the Severodvinsk industrial region in the areas where there are summer cottages and gathering

The oasis-desert ecotone plant community is a protective barrier for an oasis. With the continuous expansion of oasis ecosystems and gradual increases in the intensity of human activities, the degradation of plant communities in oasis-desert ecotones has become increasingly prominent. Timely and accurate detection of such degradation is a prerequisite for vegetation restoration. Currently, vegetation

The present study includes analysis of six heavy metals, to determine spatial distribution and potential ecological risk at 10 stations of the Gulf of Kachchh, Gujarat, India. The geochemical exploration of toxic heavy metals on Gulf of Kachchh was evaluated using hierarchical cluster analysis (HCA). Pollution indices such as contamination factors (CF), pollution load index (PLI) and degree of contamination

A new three-dimensional shear-strength criterion (3DSSC) considering the three-dimensional (3D) roughness of rock joints and the internal friction angle of rock masses is discussed. Two methods for transforming the parameters of the 3DSSC into the linear Mohr–Coulomb failure criterion parameters are proposed. The calculation method of the anti-sliding safety coefficient of a rock slope controlled by

In North China, the exploitation of deep coal seams is seriously threatened by water inrush from Ordovician limestone. Predicting the water yield property of the Ordovician limestone aquifer has been an important and challenging task. Based on accessible geological and hydrological data, a water yield property index (WYPI) model, which integrated four factors including the water inflow of borehole

Underground excavation usually results in the decrease of horizontal stress in the front of the working face, which may trigger the occurrence of rock bust hazards. Examining rock failure under confining pressure unloading conditions is necessary to reveal the fracture mechanism of rock mass subjected to stress disturbance. Although many investigations have studied the rock mechanical behaviors during

Understanding multiphase flow properties is essential for assessing and exploiting coals. These properties depend on the 3D pore space information, i.e. geometry and topology. However, determining the geometric and topological properties in coals are still challenging due to the complicated pore structures comprising several length scales. Studying pore scale structures in coals in a continuous range

Soil erosion is the most crucial factor in land degradation in semi-arid areas. Natural climatic, edaphic, and topographic conditions, and human activities have made Morocco vulnerable to soil erosion. At the watershed scale, soil erosion assessment is of great importance in conservation strategies. The aim of this study is to assess soil erosion risk in Tensift watershed using the RUSLE model. Remote