In situ stress is a key controlling factor of coal mine water inrush and thus research on modern in situ stress fields is of great significance for the prevention and control of coal mine water inrush. In this paper, the modern in situ stress of the Kailuan mining area in China was determined and analyzed. In particular, we evaluated variations in in situ stress with depth, in situ stress field direction

This qualitative and quantitative study describes the evolution of water–rock interaction processes in the groundwater–seawater mixing zone diagenetic environment associated with the development of sand injectite outcrops of the Bahrah coastal plain, northern Kuwait Bay. Fourteen rock samples were collected from the field area for petrographic analyses, X-ray diffractometry (XRD), transmitted-light

Taiyuan Basin is one of the regions that suffered from severe land subsidence in China. Surface deformation monitoring of local areas within the basin has previously been performed. However, ground subsidence monitoring covering the entire basin has not been implemented before. We conducted this study for the purpose of disaster reduction. ALOS PALSAR imagery from three tracks was used. The StaMPS

The stability of tailgate plays an important role in the safety mining of working face. In the present work, a tailgate of Tongxin mine in north Shanxi Province, China, has been taken as the research background; the non-repeated and long-distance advance support technology (NLAST) has been studied by theoretical analyses and field practice. The lateral overburden structure characteristics (LOSC) and

Evapotranspiration (ET) is an essential process for defining the mass and energy relationship between soil, crop and atmosphere. This study was conducted in Al-Ahsa Oasis, Eastern Region of Saudi Arabia, to estimate the actual daily, monthly and annual evapotranspiration (ETa) for different land-use systems using Landsat-8 satellite data during the year 2017/2018. Initially, six land-use and land-cover(LULC)

To investigate why tailings piping break, identify the mechanisms of tailings dam breaches, and discover how mine tailings flood behave, a large-scale physical model of a tailings reservoir was constructed. The model tailings dam was breached and this breaching test was used to study dam breaching and the resulting tailings flood. The results show that a scour channel is formed in the dam by piping

Amount and type of suspended sediments in streams can change over seasonal timescales and during high-flow events. The dynamics of the suspended sediment in the streams and rivers of the Mediterranean region of Turkey are not yet fully understood, as studies are limited. In this study, it is aimed to analyze the seasonal variation of suspended sediment transported over 12 months in the Korkuteli Stream

A broken zone usually exists in the deeply buried tunnels after excavation, and the rock mass in the broken zone is in the state of unloading failure and exhibiting a nonlinear dilatancy effect. In order to study the deformation of isotropic rock mass in an initial hydrostatic stress field, a method is proposed to calculate the radius of the broken zone of the surrounding rock in a circular tunnel

Beach-bar is a common kind of lacustrine sedimentation distributed in the shallow water area. To date, a large amount of oil and gas resource was explored within beach-bar reservoir. However, the depositional mechanism and internal architecture of the beach-bar system are still to be discovered. In this paper, to reveal the formation of a beach-bar system, an experimental beach-bar system was produced

Knowledge about quantifiable spatial variability and spread of the soil physico-chemical parameters is critical for elucidating the ecosystem functioning and designing the sustainable soil-plant-environment management practices. The spatial variability of soil parameters of apple orchards of Kashmir have not been reported so far. Therefore, the study examined the soil spatial distribution of selected

The topographic nature of Makkah, Saudi Arabia, hinders most of the urban development and expansion activities except on the foothills of the mountains, where most of the already developed and ongoing/planned new settlements occur. Al-Hussainiyah area is one of many unplanned settlements that has been constructed along the course of Wadi Uranah flood plain. The area has been affected by many flash

The prediction of gas emission is an effective measure to prevent gas disasters. In view of the difficulty in predicting the amount of gas emission and the lack of prediction methods in the current horizontal sublevel caving of extremely thick coal seam, this paper takes the Baiqigou coal mine as the engineering background and analyzes the gas emission data during the mining of each horizontal sublevel

Alam El Bueib Formation is one of the most prolific oil-producing reservoirs in the Matruh Basin, Khalda Concession. The Jade oil field is located in the Matruh Basin in the northern part of the Western Desert, Egypt. The primary goal of this project is to learn more about the Alam El Bueib (AEB) Formation’s hydrocarbon presence and entrapment conditions. The analysis of 3D seismic and well log data

Coal and gas outbursts are one of the most serious disasters in coal mining, and disaster prediction and prevention alarms are key technologies to prevent coal and gas outbursts. This paper summarizes the progress of research on outburst prevention alarm indicators and prevention alarm technology for mines; the mechanism of coal and gas outbursts; the relationship between the coal seam geological environment

Developing simple empirical correlations to predict the compression index of fine-grained soils has been the major concern of many previous studies to enable speedy and economic approach for estimating the consolidation settlement. However, evidence from recent studies showed the necessity to examine these empirical correlations using site-specific results. Latest studies also illustrated the need

Severe dust storms frequently prevail over the Persian Gulf impacting the visibility and air quality. This study aims to investigate a severe dust storm that occurred during 25 to 26 February 2020 over the Persian Gulf to investigate governing synoptic patterns and CAMS model simulation in a severe frontal dust storm in the Persian Gulf area. The dust storm was severe and widespread that affected seven

Evaluation of optimum rock cutting performance is very important, especially at the phase of the design of a tunneling machine. In this regard, existing theoretical, laboratory, numerical, or empirical methods focus only on the optimum ratio of cutter spacing over penetration, and they need further enhancements to include various design aspects of the TBM cutterhead with respect to cut and cutter geometry

This paper explores the feasibility of the electrical resistivity (ER) method as non-invasive technique to detect dysfunctions of full-scale tertiary wastewater treatment wetlands, such as clogging, that ultimately limit the system lifetime and performance. ER measurements were carried out according to the Werner’s method on two (overloaded) horizontal subsurface wetlands (HSF-CW1 and HSF-CW2) operated

Groundwater is one of the major resources of civilization which cannot be visualized directly in day to day life. Scarcity of groundwater is an alarming threat to the ecosystem. The present study was conducted to evaluate water quality and interrelated environmental impact of 38 groundwater samples applying the water quality index (WQI) method and multivariate statistical tools. This investigation

Champeh salt dome is located 30 km northwest of Bandar Lengeh, east of Hormozgan province, Iran. Iron ores and several alterations can be found in this salt dome, which consists of evaporitic and volcanic sequences of the Hormoz series and Pabdeh-Jahrom, Asmari, Gachsaran, and Mishan formations. The existing geological maps do not provide comprehensive details of mineralization, alteration, and various

The aim of this study was to understand the ecohydrological interactions of periphyton assemblages in a canal (Bishalakhi) located in the Indian Sundarban. Sixteen environmental variables and periphyton (scrapped from a known area of submerged natural substrates) were collected seasonally (pre-monsoon, monsoon, and post-monsoon) from three sampling stations between July 2017 and September 2018. Data

This study presents an efficient approach to predict the Rabi and Kharif crop yield using a relatively new and robust machine learning (ML) model named random forest (RF). The standard precipitation evaporation index (SPEI) with different time lags (e.g., 1 to 12 months) are utilized as predictive variables. The SPEI was estimated using the climate prediction center (CPC) precipitation, and temperature

The fragmentation rate and particle size distribution of the muckpile after blasting have important influences on the performance of subsequent mining activities such as loading, hauling, crushing, grinding, and the overall costs of the mine. Drilling and blasting are important steps in the chain of mining processes, and its results affect the efficiency of downstream processes accordingly. There is

In this research, De Martonne’s index of aridity (IDM), Pinna combinative aridity index (IP), and UNEP aridity index (AI) were used for the drought analysis in the Sirvan river basin, Iran, during the period 2002–2018. Spatiotemporal analysis of aridity indices on each station was determined by calculating the Z statistic value of the nonparametric Mann–Kendall (MK) method of time series on the index

Evapotranspiration (ET) is a major hydrologic process to assess water budgets in terrestrial ecosystems. Since measurement of ET may involve labor intensive field technics in large areas, estimation is preferred in most cases. The FAO Penman-Monteith (PM FAO-56) is a widely recognized reference evapotranspiration (ETo) method for potential evapotranspiration calculations. The method requires a detailed

Usually, there exist both pores and oriented cracks in real rocks, and the existence of oriented cracks leads to the anisotropy, alters the rock stiffness property, and affects the elastic wave velocities. Besides, the local flow (squirt flow) between pores and cracks is also considered an important factor influencing the elastic wave velocities. In this paper, the frequency-dependent model is derived

The characterization of organic matter (OM) composition, physico-chemical, geochemical, and mineralogical studies of sedimentary core can help to better understand the paleoclimates and the depositional environments. The purpose of this work is to identify the factors monitoring the mineralogical composition and the sedimentation of sebkha Mhabeul sediments (southeastern Tunisia), during the Holocene

Tsunami evacuation is a short process that must be carried out in minutes. Determining the evacuation routes and safe areas is equally important in tsunami evacuation planning. It can be established from least cost distance (LCD) anisotropic model. We use the coastal of Drini, Gunungkidul, Java, Indonesia, as the study area, which is located in a tropical coastal karst region, with a typical karst

A vital natural ecosystem balance including seed sprouting, plant nutrition and growth, water infiltration, plant transpiration, redistribution, evaporation, and percolation relies on paramount property of soil moisture. Understanding soil moisture measurement and its pattern is crucial for various important fields such as meteorology, hydrology, agriculture, weather, and climate studies. In recent

Flash floods are among the most common natural hazards in Egypt. Wadi El-Darb, one of the vastest drainage catchment in the Eastern Desert of Egypt, is considerably subjected to severe flash flood events. The coastal city of Ras Gharib is located at the outlet of this Wadi, which consequently makes it susceptible to the flash flood hazard. Ras Gharib has a strategic importance to Egypt that it produces

Identifying weak geochemical anomalies from background is vital in the exploration of complex metallogenic systems. The window-based local singularity analysis (LSA) method is widely used to quantitatively characterize the local singularity structural properties of nonlinear geological processes. In this study, a batch method for local singularity mapping based on quadtree is proposed to improve the

Design, operation and management of dams and reservoirs is governed by the discharge and sediment load and of a river. Despite being among the largest river basins in the world, sediment–discharge ratings of the Ganga River has received little attention from the researchers probably due to lack of data availability. The present paper aims at analysing the sediment and discharge rating characteristics

The Wadi Faliq El Sahl–Faliq El Waar area comprises four various types of rocks including metavolcanics, older granites, Hammamat sediments, and younger granites of monzogranite and syenogranite composition. From the various structural analyses in the investigated area, the main trends controlling the structural and tectonic framework are ENE-WSW and NE-SW, while the trends NNE-SSW, WNW-ESE, and N-S

The presence of colloids and bacteria in groundwater affects contaminant migration either by facilitation or retardation. The co-transport of contaminant and colloidal particles had been simulated using various finite difference schemes which may suffer from the known and common numerical dispersion problem. In this study, a random walk particle tracking (RWPT) scheme is developed to simulate the co-transport

Due to the presence of organic compounds, heavy metals, various hydrocarbons, organic solvents, aromatic compounds, linear formaldehyde, fats, and grease, petroleum products are among the most life-threatening factors in the ecosystem. Therefore, this study was conducted to examine the soil surrounding Shazand Oil Refinery Complex in Markazi Province, Iran, and assess the concentration of various heavy

Clayey soils that occur in many countries, including Jordan, are considered poor materials for engineering construction because of their unfavorable geotechnical properties. Previous studies have shown that engineering performance of such soils can be improved by using different additives. This study was designed to evaluate geotechnical properties and durability characteristics of the Jordanian clayey

Determining the safety factor by limit equilibrium methods is based on different assumed slip surfaces and equilibrium equations for forces and moments to be satisfied. The safety factor can be predicted using empirical correlations instead of going through lengthy calculations. In this paper, empirical equations between the factor of safety (FS), unit weight (γ), cohesion (c), internal friction angle

Jurassic Sangonghe sandstones (J1s) are prolific oil reservoirs in the Mosuowan area of the Junggar Basin. However, hydrocarbon exploration in deep-buried sandstones with depths > 4km would be highly risky due to the reservoir quality. Analysis of diagenesis can provide insight into controls on reservoir quality, which helps to reduce exploration risks and predict reservoir quality in perspective area

This study explores the paleoenvironmental changes of the Acholla coast over the last 2000 years by means of subsurface sediment analyses of lagoonal deposits via a multiproxy approach. A sequence of 5 steps is shown to have shaped the coastal development at Acholla and includes (i) the settlement of an open marine embayment during the Upper Pleistocene (substage 5e) in response to a transgressive

Matching the velocity model to the actual engineering and geological conditions and improving the accuracy and stability of the microseismic (MS) source location remain challenges for scientists. An MS source location method based on a velocity model database and statistical analysis, named LM-VMD-SA, is proposed in this study. The method firstly divides the monitoring area into different subareas

Water is an essential resource and is a basic need for all living beings. A combination of natural and human factors impacts the consistency of water. In compliance with international norms in Padmanabhapuram, District of Kanyakumari, this analysis is projected to study the water suitability for household and irrigation determinations. Eighteen sampling locations with Global Positioning System were

Well resistance depends on discharge capacity of prefabricated vertical drains (PVDs), which affects the consolidation rate of soil at high water content importantly. Due to the lack of an axisymmetric large-strain consolidation model considering well resistance under vacuum pressure, the effect of well resistance on the degree of consolidation of ultra-soft soil is not clear. An axisymmetric large-strain

Advancements in computational and geospatial technologies have made it quite possible to conceptualize the intricacy of urban growth and land use change phenomenon. The cellular automata (CA) and geographic information system (GIS) framework-based approaches are commonly used in modeling and simulation of urban growth and land use/land cover changes, e.g., the SLEUTH model. The SLEUTH model may be

This paper takes the fault of the Wang Lou panel 13301 in Shandong Province, China, as the object. A three-dimensional coupled hydromechanical model was established. The lag water inrush from primary impervious fault is studied. The spatiotemporal evolution characteristics of displacement, stress, and strain field under mining disturbance are studied by model test. The multi-physical field evolution

One of the most unpredictable and potentially hazardous soils in hot and arid climates is the sabkha soil. This soil is known as problematic because, upon wetting, it is susceptible to collapse due to the dissolution of cementing materials and its corrosive effects and heaves due to the salt crystallization/recrystallization process. Sabkha soil spreads along the seaboard of the Red Sea and Arabian

Geochemistry of glass shards belonging to Youngest Toba Tuff (YTT) ash from eight different localities of Purna alluvial basin, Central India have been carried out to interpret magmatic and postdepositional processes led variations. Inter- and intra-basinal correlations of analytical data have also been made. The ash comprise of abundant glass shards, minor quantity of minerals, and fine-grained admixture

A setup of a two-dimensional hydrodynamic model based on Delft3D modeling system for the coastal waters of Jeddah is described. Sensitivity tests of both numerical and physical parameters defined in the model and validation of the numerical model are also described. The model was forced by major tidal constituents along the open boundary. The performance of the model was evaluated using available water

Overburden landslide is a common natural disaster worldwide. Many scholars study the stability of the overburden layer based on a linear, fold-line, or circular bedrock surface. They rarely systematically analyze the influence of irregular bedrock surfaces on instability characteristics of the overburden layer, because quantitatively characterizing an irregular bedrock surface is still problematic

A structural interpretation of land gravity data was carried out in Garoua (North Cameroon) in a view to delineating the structural framework of the area. The isostatic gravity anomalies were computed based on the Airy-Heiskanen local compensation model. The interpretation of those isostatic anomalies combined with profiles Px and Py shows that the isostatic compensation concept is not fully satisfied

Water stress will intensify as rapidly growing urban areas place heavy pressure on the available water resources. The study adopts system dynamic (SD) modelling—a decision aid tool in assessing the vulnerability of water resources by exhibiting interrelationships between the variables in the system. This model is applied in Chennai City, India, which is continuously affected by water stress issues

The protection of adjacent buildings is an important part of the safety control of the construction of a deep foundation pit in a subway station, and a reasonable supporting method is the key to safety control. Based on the deep foundation pit project of the Nanning Metro Line 5 station in Guangxi, this paper proposes a method of combined support of the isolation pile and the diaphragm wall for the

In this work, the 3D seismic velocity approach is successfully used in the characterization of the Sisseb-El Alem basin structural framework. It has highlighted the utility of using seismic velocity data in the interpretation of the deep geological basin structure. A high concordance between the geologic and seismic velocity interpretations of seismic data is highlighted. Representation of tomography

This study describes benthic foraminifera from the Eocene Formations at Wadi Hitan in the Fayum area of Egypt: El Gharag Formation (Lutetian), Gehannam Formation (Lutetian–Base Bartonian), Birket Qarun Formation (Late Bartonian), and Qasr El-Sagha Formation (Priabonian) in stratigraphic order. The study revealed 43 species of benthic foraminifera that belong to 31 genera. The identified foraminifera

Eastern Tunisia is a semi-arid to arid area, located in the southern Mediterranean side, in North Africa. It is facing water scarcity, overexploitation, and decreasing water quality of the phreatic water table. Water supply and storage do not respond to the demographic and economic growth and demand. In addition, only 5 109 m3 of water from 35 109 m3 per year renewable rain water supply can be retained

We compute a new gravimetric geoid model for Peninsular Malaysia (PMGG2020) based on the Royal Institute of Technology (KTH) method. The PMGG2020 was computed from 8474 terrestrial gravity points, satellite altimetry-derived gravity anomaly (DTU17), 24,855 airborne gravity data, and the TanDEM-X Digital Elevation Model. All the gravity datasets were combined and gridded onto a 1-min resolution using

Geosynthetic-reinforced soil-integrated bridge system (GRS-IBS) has obtained wide popularity recently. Despite of the abundant research on the behavior of GRS-IBS under static loading, its dynamic performance has not been investigated well, especially for the whole GRS-IBS structure. In this paper, a numerical model in finite element DBLEAVES program was built to simulate the seismic response of GRS-IBS

Labyrinth weirs are often a favorable design option for regulating the water surface level in irrigation channels and increasing the spillway discharge capacity of dams. Sedimentation in irrigation channels and around related hydraulic structures such as weirs and turnouts is a common problem that causes disruption in operation. In this research, the effects of upstream sedimentation levels (non-sedimentation

Predicting sediment transport rates has always been important in the field of coastal engineering due to its impact on coastline changes and port dredging. Today, in addition to experimental and quasi-experimental methods to study the phenomenon of sediment, the use of methods based on soft computing, machine learning, and artificial intelligence was considered. The reason is that the existing experimental

In the southwest of China, the topography and geomorphology are complex, and the geology is changeable, and the karst landforms are widely distributed, which results in exposing existing karst caves in many tunnel constructions. Tunnel design should secure not only the safety of hydraulic pressure-resistant structure during the operation period, but also the hydraulic pressure-resistant performance

Drought severity and its associated impacts remain persistent in the water-stressed regions of the world including the Sahel of Africa. Across the Sahel, there exist limited ground stations monitoring weather observations. This limitation has created an uphill task in trying to understand the role of climate in drought conditions across the entire Sahel of Africa; hence, the use of Earth observation