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Journal articles on the topic 'Mathematical modeling of groundwater level changing'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Sierikova, Olena, Volodymyr Koloskov, and Elena Strelnikova. "The groundwater level changing processes modeling in 2D and 3D formulation." Acta Periodica Technologica, no. 53 (2022): 36–47. http://dx.doi.org/10.2298/apt2253036s.

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The objective of this study was to develop a mathematical model to determine the tendency of the groundwater level changes under the influence of external factors to prevent environmentally hazardous impacts and emergency situations. Mathematical methods (analytical solution of differential filtration equations involved the computer program Maple) - for creation the groundwater level changes model, methods of ecological and economic assessment and comparative analysis - for the identification of groundwater level impact important factors and groundwater level impact on the environment, balance

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2

Daliev, Sherzod, Fazliddin Sirojiddinov, and Oxun Khaitov. "Developing Mathematical Models to Study Changes in Groundwater Levels and Salt Concentration." E3S Web of Conferences 589 (2024): 03011. http://dx.doi.org/10.1051/e3sconf/202458903011.

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Understanding how groundwater and salt concentrations change when freshwater supplies are monitored is crucial. In this work, groundwater fluxes and salt migration were considered when studying groundwater level changes and mineralisation processes. To study salt and water level changes, a more realistic mathematical model was developed to reflect the object’s basic features. To monitor geofiltration and geomigration using mathematical and numerical modelling to provide recommendations, nonlinear differential equations were applied. Scientific research on mathematical and numerical modelling a

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3

Intui, Sutasinee, and Shinya Inazumi. "Experimental and Analytical Evaluations of Ground Behaviors on Changing in Groundwater Level in Bangkok, Thailand." Water 15, no. 10 (2023): 1825. http://dx.doi.org/10.3390/w15101825.

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Groundwater level changes have numerous effects on buildings, such as differential ground deformation and cracking on the wall. In Bangkok, Thailand, change in groundwater levels changing was caused by groundwater pumping that took place from 1978 to 1997. This is the main effect of ground deformation in a wide area of the Bangkok plain. According to the regulation of groundwater pumping in Bangkok and urban areas, the trend of groundwater level tended to recover around the year 1997. However, the ground settlement still occurs for a while after groundwater recovery. The objective of this stud

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4

Akhralov, Shavkat, Rustam Yusupov, Khojakbar Egamberdiev, and Javot Jumanov. "Geoinformation technologies and methods of mathematical modeling in hydrogeological research." InterCarto. InterGIS 26, no. 2 (2020): 240–52. http://dx.doi.org/10.35595/2414-9179-2020-2-26-240-252.

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In the article the application issues of geographic information technologies and methods of mathematical modeling of geofiltration and geomigration processes of hydrogeological systems were discussed, as well as for information support of the groundwater monitoring system. The object of research is the Akhangaran aquifer, which is a large industrial area with intensification of agriculture, as well as densely populated, where industrial reproduction of water resources is established by designing water intake facilities using groundwater, also having huge data on regime, geological and hydrogeo

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5

Biliaiev, M. M., and V. V. Kozachyna. "Modeling of Filtration and Heat and Mass Transfer Processes in Groundwater." Science and Transport Progress, no. 3(107) (September 23, 2024): 5–14. http://dx.doi.org/10.15802/stp2024/313664.

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Purpose. The method of mathematical modeling is an important tool for solving complex problems involving the analysis of groundwater dynamics and heat and mass transfer processes in them when studying their contamination from various anthropogenic sources in the event of accidental spills of chemically hazardous substances, etc. The main purpose of the article is to develop a set of mathematical models for calculating the process of filtration of non-pressure groundwater, mass transfer of impurities and the process of heat transfer in groundwater. Methodology. The two-dimensional Boussinesq eq

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6

Akhtar, Seemab. "GIS and Mathematical Trend Surface Modeling of Groundwater Level in Parts of the Bundelkhand Craton, India." Asian Journal of Geographical Research 8, no. 2 (2025): 93–107. https://doi.org/10.9734/ajgr/2025/v8i2265.

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The application of mathematical trend surface modeling in combination with geostatistical methods has been demonstrated to be both a cost-effective and reliable approach for elucidating the geological characteristics of aquifer systems. This research introduces an innovative model for assessing the spatial variability of groundwater levels and the structural characteristics of associated aquifers. The model integrates geostatistical techniques with Geographic Information Systems (GIS), offering a robust framework for spatial analysis. The study encompasses seven districts of the Bundelkhand re

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7

Biliaiev, M. M., and V. V. Kozachyna. "MODELING OF GROUNDWATER HYDRODYNAMICS IN FLOODED AREAS." Ukrainian Journal of Civil Engineering and Architecture, no. 2 (014) (January 22, 2025): 36–41. https://doi.org/10.30838/j.bpsacea.2312.250423.36.928.

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Problem statement. The task of calculating the dynamics of groundwater in the flooded area during the operation of local drainage is considered. The difficulty of solving this problem consists in the fact that in the presence of building on the flooded territory, it is impossible to use the existing regulatory methods for calculating the drainage. Therefore, there is a need to develop specialized mathematical models for evaluating the change over time in the groundwater level in the flooded area. The purpose of the work is to develop a numerical multi-parameter model and create a computer code

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8

Meng, Xiang Tao, Wang Lin Li, Xi Wang, and Xiao Yan Wei. "Study of Numerical Modeling for Reduction Rate of Porosity of Sand under Equal Amplitude Cyclic Loading." Applied Mechanics and Materials 353-356 (August 2013): 2652–57. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.2652.

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According to the geological conditions and operating regimes of Wang river groundwater reservoir of Laizhou in Shandong, through doing sandy one-dimensional equal amplitude circulating compression test, the effect of groundwater level repeated rising or falling on volumes of groundwater reservoir is simulated, the character of porosity changing regulation with circulating period is analyzed, the relation between reduction rate of porosity and circulating period is summarized, and the hyperbolic model of reduction rate of porosity and circulating period is constructed initially, the concept of

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9

Hsieh, Ping-Cheng, Po-Wen Yu, and Ming-Chang Wu. "Analytical modeling of 2D groundwater flow in a semi-infinite heterogeneous domain with variable lateral sources." AIMS Mathematics 9, no. 4 (2024): 10121–40. http://dx.doi.org/10.3934/math.2024495.

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<abstract> <p>In nature, aquifers are usually composed of distinct kinds of media, i.e., heterogeneous domains rather than homogeneous domains. Groundwater level and flow changes in such domains are more complicated than those in homogeneous domains; thus, building a mathematical model for addressing groundwater flow in heterogeneous aquifers is the present research goal. In conventional research on similar topics, many one-dimensional (1D) analytical models have been presented, but it is challenging to simulate real-world scenarios. This study develops a two-dimensional (2D) analy

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VEDYASHKINA, V. V., and S. P. POZDNYAKOV. "GROUNDWATER LEVEL FLUCTUATIONS AT THE KAMENNAYA STEP’ STATION AS AN INDICATOR OF CLIMATE CHANGE IN THE MIDDLE DON BASIN." Meteorologiya i Gidrologiya, no. 11 (November 2024): 33–46. https://doi.org/10.52002/0130-2906-2024-11-33-46.

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The multiyear and intraannual groundwater level fluctuations in the Kamennaya Steppe Reserve located in the Voronezh oblast are analyzed using the data of the water level monitoring in the Dokuchaev pit. The intraannual and long-term variability of the Quaternary aquifer groundwater levels is determined by the dynamics of infiltration water exchange between groundwater and the surface, so directional changes in the water balance at the surface and in the soil should be reflected in the hydrograph of pit levels. The analysis of the relationship between groundwater levels and variability of clim

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11

Kurniawan, B., E. R. Tapriziah, M. H. Aryantie, R. Rahmani, and A. D. Purnomo. "Application of groundwater modeling to predict the effectiveness of various peat dome restoration methods in Pulang Pisau District, Central Kalimantan Province." IOP Conference Series: Earth and Environmental Science 909, no. 1 (2021): 012004. http://dx.doi.org/10.1088/1755-1315/909/1/012004.

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Abstract A number of Indonesian Peat Hydrological Units (Kesatuan Hidrologis Gambut/KHG) have undergone severe degradation and require an effective restoration measure to increase their ecological, social, and economic function. A peat dome located in Garung village, Pulang Pisau District, Central Kalimantan Province, was selected in this research. It aimed to apply the mathematical modeling to predict the effect of various restoration methods on the sustainability of ecological functions of peak dome in this area and reveal the advantage and disadvantages of each specified method. The groundw

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12

Simion, Dalia, and Dorel Berceanu. "Mathematical Modeling of Human Capital Evolution at Micro and Macroeconomic Level." Advanced Engineering Forum 27 (April 2018): 136–41. http://dx.doi.org/10.4028/www.scientific.net/aef.27.136.

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Knowledge of human potential and especially labor resources implies a system of indicators, a quantitative and qualitative analysis that is complex and truthful at all levels. Human resources are changing in size and features in an organization. We intend to represent the human resources of an organization and the changes they undergo by using mathematical modeling, differential equations and even default probabilities.

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13

Abdullayev, Akmal, Muyassar Hidoyatova, and Nigora Safarbayeva. "About one boundary-value problem arising in modeling dynamics of groundwater." E3S Web of Conferences 365 (2023): 01016. http://dx.doi.org/10.1051/e3sconf/202336501016.

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Modeling the movement of moisture in the soil is of great importance for assessing the impact of agricultural land on surface water bodies and, consequently, on the natural environment and humans. This is because huge volumes of pollutants from the fields (pesticides, mineral fertilizers, nitrates, and nutrients contained in them) are transferred to reservoirs by filtering moisture. Different methods solve all these tasks. The method of natural analogies is based on the analysis of graphs of fluctuations in groundwater level. To apply this method on irrigated lands, it is necessary to have a s

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14

Kupfersberger, Hans, Gerhard Rock, and Johannes C. Draxler. "Combining Groundwater Flow Modeling and Local Estimates of Extreme Groundwater Levels to Predict the Groundwater Surface with a Return Period of 100 Years." Geosciences 10, no. 9 (2020): 373. http://dx.doi.org/10.3390/geosciences10090373.

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Knowledge about extreme groundwater levels is needed to avoid structural or environmental damage by groundwater flooding. Typically, distributions of extreme groundwater levels are generated by interpolation between results derived from local extreme value analysis at groundwater observation wells. As an alternative methodology, we propose to apply the Gumbel distribution to groundwater level time series, which are computed by a groundwater flow model. In the approach, model-based and observation-based extreme groundwater values are compared at every observation well using the model simulation

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15

Milić, Marijana, Goran Jeftenić, Danilo Stipić, and Ljubomir Budinski. "Mathematical Modeling of Groundwater Flow: A Case Study of Foundation Piles in the Vicinity of Danube River." Applied Sciences 13, no. 24 (2023): 13277. http://dx.doi.org/10.3390/app132413277.

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This study investigated the interaction of groundwater flow and foundation piles located in the vicinity of the Danube River. The piles represent an obstacle to the groundwater flow, causing a backwater effect upstream whilst increasing the local flow velocity. On the other hand, a high flow velocity around the piles can cause suffusion of the surrounding soil in the long term, thus significantly reducing the shaft resistance of the piles. A 3D model of groundwater flow and its impact on the piles was developed in the software 10.3 package GMS based on MODFLOW 2005. The model was calibrated by

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16

Daliev, Sherzod, Dilshod Karshiev, Yuldosh Islamov, and Umida Sharipova. "Mathematical modeling of salt concentration change process in two-layer aqueous media." E3S Web of Conferences 401 (2023): 02009. http://dx.doi.org/10.1051/e3sconf/202340102009.

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A mathematical model was developed to monitor and predict changes in salt concentration in groundwater in a two-layer environment, representing the process of salinization and swamping. A qualitative analysis of scientific research on the problem is provided. Since the process is represented by a differential equation, effective numerical computational algorithms were developed to solve the problem of salt concentration change in groundwater based on a stable disclosure scheme with high-order accuracy relative to time and spatial variables. Mathematical models of salt transport during geo-filt

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17

Ismaiylov, G. Kh, and N. V. Muraschenkova. "MODELING OF A WATER-SALT BALANCE OF A RIVER POOL WITH DEVELOPED IRRIGATED AGRICULTURE." Ecology. Economy. Informatics.System analysis and mathematical modeling of ecological and economic systems 1, no. 5 (2020): 65–70. http://dx.doi.org/10.23885/2500-395x-2020-1-5-65-70.

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The construction of a mathematical model of the water-salt balance for river basins with the predominant development of irrigated agriculture is considered. The structures of the water and salt balance of the irrigated territory and the balance of the main river bed within it are given. It has been established that if the inflow and outflow of water and salts dissolved in it are caused by its horizontal flows, then the evaporation and accumulation of water (salts) in the aeration zone and groundwater are caused by its vertical flows.This leads to the need to consider instead of the general equ

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18

SIERIKOVA, O. M., and O. O. STRELNIKOVA. "THE GROUNDWATER LEVEL CHANGING PROCESSES MODELING OF THE URBAN TERRITORIES IN 2D AND 3D FORMULATION." Applied Questions of Mathematical Modeling 3, no. 2-2 (2020): 243–56. http://dx.doi.org/10.32782/kntu2618-0340/2020.3.2-2.24.

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19

Kimball, Colin E. "Evaluating Groundwater Pollution Susceptibility of Dust Suppressants and Roadbed Stabilizers: Case Study of a Petroleum-Based Product." Transportation Research Record: Journal of the Transportation Research Board 1589, no. 1 (1997): 64–69. http://dx.doi.org/10.3141/1589-11.

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Current environmental regulations have prompted regulatory officials, users, and manufacturers of roadbed stabilizers and dust suppressants to evaluate the environmental impact of these products to ensure that human health and the environment are not compromised through their use. Because roadbed stabilizers and dust suppressants are inherently designed to prevent dust emissions and erosion, this study focuses on evaluating the groundwater pollution susceptibility of roadbed stabilizers and dust suppressants. Current techniques used in evaluating hazardous waste sites to estimate the fate and

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20

Javadinejad, Safieh, Rebwar Dara, and Forough Jafary. "How groundwater level can predict under the effect of climate change by using artificial neural networks of NARX." Resources Environment and Information Engineering 2, no. 1 (2020): 90–99. http://dx.doi.org/10.25082/reie.2020.01.005.

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The phenomenon of climate change in recent years has led to significant changes in climatic elements and as a result the status of surface and groundwater resources, especially in arid and semi-arid regions, this issue has sometimes caused a significant decline in groundwater resources. In this paper, the effects of climate change on the status of groundwater resources in Marvdasht plain have been investigated. Water supply of different parts of this region is highly dependent on groundwater resources and therefore the study of groundwater changes in future periods is important in the developm

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21

Bilaiev, M. M., and V. V. Kozachyna. "MODELING OF GROUND WATER DYNAMICS AND ITS POLLUTION." Ukrainian Journal of Civil Engineering and Architecture, no. 2 (020) (June 3, 2024): 137–43. http://dx.doi.org/10.30838/j.bpsacea.2312.260324.137.1052.

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Problem statement. Large accumulators of liquid waste (e.g., mine water ponds, tailing ponds, etc.) are long-term sources that change the hydrological regime. A negative consequence of this process is flooding of the territory. In addition, the infiltration of contaminated water from such hazardous sources changes the quality of groundwater. Therefore, it is important to analyze the impact of such anthropogenic sources on the process of flooding and deterioration of groundwater quality. To solve this problem, it is very important to use the method of mathematical modeling as an effective mean

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22

Elugachev, P. A., E. A. Esharov, B. M. Shumilov, and A. Zh Kuduev. "3D modeling of box-section road surface." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 23, no. 1 (2021): 175–83. http://dx.doi.org/10.31675/1607-1859-2021-23-1-175-183.

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In road design, it is most important to obtain an optimum road surface (left and right traffic ways, left and right road sides, left and right slopes, etc.) using a number of criteria (sometimes hundreds of criteria), which include a slope, absolute elevation, elevation relative to the groundwater level, distance from the top of pipe-culvert, and others. In most computer-aided design systems, a digital model of the project is built by using a Delone triangulation.This paper deals with a new mathematical apparatus for spatial setting out of box-section roads in the form of a nonclosed polyhedro

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23

Malkovsky, V. I., V. A. Petrov, and V. A. Minaev. "INFLUENCE OF ORIENTATION OF ACTIVATING TECTONIC FAULTS ON SAFETY OF A SYSTEM OF ISOLATION OF RADIOACTIVE WASTE." Доклады Российской академии наук. Науки о Земле 508, no. 1 (2023): 144–50. http://dx.doi.org/10.31857/s268673972260196x.

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Methods of mathematical modeling were used for estimating an influence of tectonic faults activation of safety of a facility for final isolation of high-level radioactive waste at the site Yeniseiskiy (Krasnoyarsk region) by methods of mathematical modeling. A 3–D model of radionuclides transport by groundwater was considered taking into account a heterogeneity of rock permeability. Faults of different orientation were considered. We showed that a formation of new near-meridional faults or an activation of ancient ones did not exert a substantial influence on velocity of radioactive pollution

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24

Laptev, A. B., A. M. Kogan, E. V. Nikolaev, A. A. Rogachev, Zh V. Ihnatovich, and Yu V. Matveenko. "Mathematical modeling of the creation process and aging of polymer composite materials." Proceedings of the National Academy of Sciences of Belarus. Physical-technical series 69, no. 1 (2024): 65–75. http://dx.doi.org/10.29235/1561-8358-2024-69-1-65-75.

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Based on the analysis of the literature on the possibility of using neural networks to create new materials with high functional properties, the article considers a solution to the problem of determining the operational stability of polymeric composite materials by creating physical and chemically sound mathematical prediction models. Epoxy resins of the UP-637 and EA brands with an isophorone diamine hardener were chosen as the matrix of the model composite material, and oligobutadiene rubber of the SKN-10 KTR brand was chosen as the modifier. It justifies directions of work necessary for dev

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Dou, Liuyuan, Yuan Gao, Xianju Zhao, et al. "Simulation of Solute Transport under Changing Gradient of Water Table." Water 15, no. 18 (2023): 3187. http://dx.doi.org/10.3390/w15183187.

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Solute transport in aquifers is usually controlled by dynamic changes in groundwater tables. The influence mechanism of surface hydrological processes, especially precipitation, on solute transport under different water table conditions has not been studied much. Prior to the direct application of the existing solute transport mechanisms and models to the solute transport process, the following questions need to be addressed: (1) Do surface hydrological conditions (e.g., precipitation) cause changes in the gradient of the water table within a specific region? (2) If the gradient of the water t

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26

Ghazavi, Reza, and Haidar Ebrahimi. "Predicting the impacts of climate change on groundwater recharge in an arid environment using modeling approach." International Journal of Climate Change Strategies and Management 11, no. 1 (2019): 88–99. http://dx.doi.org/10.1108/ijccsm-04-2017-0085.

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Purpose Groundwater is an important source of water supply in arid and semi-arid areas. The purpose of this study is to predict the impact of climate change on groundwater recharge in an arid environment in Ilam Province, west of Iran. Design/methodology/approach A three-dimensional transient groundwater flow model (modular finite difference groundwater FLOW model: MODFLOW) was used to simulate the impacts of three climate scenarios (i.e. an average of a long-term rainfall, predicted rainfall in 2015-2030 and three years moving average rainfall) on groundwater recharge and groundwater levels.

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27

Maevska, Irina, Natalya Blashchuk, and Liliya Horodnik. "The effect of changing the structural scheme of reinforcing strip foundations with short piles." Bases and Foundations, no. 45 (December 23, 2022): 68–80. http://dx.doi.org/10.32347/0475-1132.45.2022.68-80.

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In the work, mathematical modeling of the reinforcement of the strip foundation of shallow laying with short piles is performed in two variants: reinforcement at the level of the sole of the existing foundation, reinforcement from the soil surface. For comparison, short piles of different lengths are considered in both versions. In order to verify the possibility of determining the bearing capacity of the reinforced foundation as a conditional foundation of shallow laying, mathematical modeling of the conditional foundation was performed for both variants of the design solution. In mathematica

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28

Solodovnikov, Denis, Stanislav Shinkarenko, Nikolai Vishnyakov, and Natalya Khavanskaya. "Groundwater of River Floodplains – Intra-Annual Dynamics and Mathematical Models." Natural Systems and Resources, no. 2 (February 2020): 54–63. http://dx.doi.org/10.15688/nsr.jvolsu.2019.2.7.

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The doctrine of natural geographical zoning is a traditional and well-developed field of physical geography. Zonal landscapes of the planet are perfectly classified and have clear diagnostic signs. The situation is different with intrazonal landscapes. The criteria for their differentiation are not so obvious. Despite the objective differences in the landscapes of floodplains of forest and steppe natural zones, the principles of their differentiation and classification have not yet been eveloped. The most important factor in the functioning of floodplain landscapes is the seasonal dynamics of

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29

Jing, Miao, Rohini Kumar, Falk Heße, et al. "Assessing the response of groundwater quantity and travel time distribution to 1.5, 2, and 3 °C global warming in a mesoscale central German basin." Hydrology and Earth System Sciences 24, no. 3 (2020): 1511–26. http://dx.doi.org/10.5194/hess-24-1511-2020.

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Abstract. Groundwater is the biggest single source of high-quality freshwater worldwide, which is also continuously threatened by the changing climate. In this paper, we investigate the response of the regional groundwater system to climate change under three global warming levels (1.5, 2, and 3 ∘C) in a central German basin (Nägelstedt). This investigation is conducted by deploying an integrated modeling workflow that consists of a mesoscale hydrologic model (mHM) and a fully distributed groundwater model, OpenGeoSys (OGS). mHM is forced with climate simulations of five general circulation mo

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Vasyliv, K. M. "Method of dynamic parameters for mathematical modelling of switching processes of valves closing of semiconductor converters." Electrical Engineering & Electromechanics, no. 3 (May 30, 2022): 28–38. http://dx.doi.org/10.20998/2074-272x.2022.3.05.

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A method has been developed for mathematical modeling of valve frequency converters (VFC) based on an analysis of the nature of the occurrence and patterns of the flow of inverse current of valves when they are locked using the dynamic parameters of valves, which are series-connected inductance and active resistance, changing in accordance with the pattern of concentration dynamics charges in semiconductor structures (bases, emitters and p-n junctions. Taking into account the presence of the inverse current of semiconductor valves significantly increases the level of adequacy of mathematical m

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31

Yegorchenko, Rostyslav, Andrii Kosenko, and Maksym Kononenko. "DIGITAL MODELING OF DESTRUCTION OF DEGASSING PIPELINES IN UNDERGROUND MINE WORKINGS." NAUKOVYI VISNYK DONETSKOHO NATSIONALNOHO TEKHNICHNOHO UNIVERSYTETU, no. 1(12) (2024): 85–95. http://dx.doi.org/10.31474/2415-7902-2024-1-12-85-95.

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Purpose. The purpose of the work is to simulate the process of corrosion formation on a degassing pipeline using Solid Works and COMSOL Multiphysics 5.6 software products. Methodology. Development of a mathematical model for establishing corrosion zones of a steel degassing gas pipeline and modeling the corrosion process in a mine environment using the SolidWorks and COMSOL Multiphysics 5.6 software package. Results. It has been established that the degassing network of mines is constantly under the influence of mechanical-electrochemical interaction, which manifests itself during longitudinal

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32

Sawadogo, Wenddabo Olivier, and Blaise Somé. "MATHEMATICAL MODELING AND NUMERICAL SIMULATION IN TRANSITORY MODE OF GROUNDWATER LEVEL IN THE PLAIN OF SOUROU (BURKINA FASO)." Far East Journal of Applied Mathematics 94, no. 1 (2016): 17–36. http://dx.doi.org/10.17654/am094010017.

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33

Zhong, Shuang, Hui Geng, Fengjun Zhang, Zhaoying Liu, Tianye Wang, and Boyu Song. "Risk Assessment and Prediction of Heavy Metal Pollution in Groundwater and River Sediment: A Case Study of a Typical Agricultural Irrigation Area in Northeast China." International Journal of Analytical Chemistry 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/921539.

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The areas with typical municipal sewage discharge river and irrigation water function were selected as study sites in northeast China. The samples from groundwater and river sediment in this area were collected for the concentrations and forms of heavy metals (Cr(VI), Cd, As, and Pb) analysis. The risk assessment of heavy metal pollution was conducted based on single-factor pollution index (I) and Nemerow pollution index (NI). The results showed that only one groundwater sampling site reached a polluted level of heavy metals. There was a high potential ecological risk of Cd on the N21-2 sampli

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Saxena, Shikha, Rajeev Kumar Bansal, and Basant Kumar Singh. "Mathematical Modeling of Transient Water Interactions Between a Sloping Aquifer and an Adjusting Stream." ECS Transactions 107, no. 1 (2022): 11295–303. http://dx.doi.org/10.1149/10701.11295ecst.

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Due to the constantly changing hydrological conditions of the surrounding water reservoirs, estimating water table changes in response to stream-stage variations and downward recharge is an emerging area in hydrology. Mathematical modeling is the emerging tool for predicting water table behavior in many complex geological situations. In this paper, a stream-aquifer model is considered and variations in the water table height have been calculated. At one end, the aquifer is in contact with a constant water level, and at the other end, the water level is rising exponentially from an adjoining st

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35

K., M. Vasyliv. "Method of dynamic parameters for mathematical modelling of switching processes of valves closing of semiconductor converters." Electrical Engineering & Electromechanics, no. 3 (May 30, 2022): 28–38. https://doi.org/10.20998/2074-272X.2022.3.05.

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<em>A method has been developed for mathematical modeling of valve frequency converters (VFC) based on an analysis of the nature of the occurrence and patterns of the flow of inverse current of valves when they are locked using the dynamic parameters of valves, which are series-connected inductance and active resistance, changing in accordance with the pattern of concentration dynamics charges in semiconductor structures (bases, emitters and p-n junctions. Taking into account the presence of the inverse current of semiconductor valves significantly increases the level of adequacy of mathematic

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36

Nikitenkova, Alexandra V., Aleksey N. Nikitenkov, Ekaterina M. Dutova, and Konstantin I. Kuzevanov. "Features of infiltration water intakes operation (on example of the Mokhovsky groundwater deposit in the Republic of Khakassia)." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 336, no. 4 (2025): 154–68. https://doi.org/10.18799/24131830/2025/4/5045.

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Relevance. The work is devoted to the study of the features of infiltration intakes operation in conditions of variability of groundwater supply. The paper considers the issues of the impact of climatic and anthropogenic factors on the nutrition of the operational aquifer of the Mokhovsky groundwater deposit. The intake is characterized by a mixed nutrition due to the formation of attracted resources from the Krasnoyarsk reservoir and from the underlying horizon of the Upper Devonian sediments. The dynamic balance between the sources of attracted resources is determined both by the productivit

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Kapkayev, A. A. "Application of the recurrent mathematical model for estimating the electric-traction NetWare parameters at their dynamic change." Journal of Physics: Conference Series 2131, no. 4 (2021): 042071. http://dx.doi.org/10.1088/1742-6596/2131/4/042071.

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Abstract The article is devoted to the possibility of applying the methods of successive approximations in the analysis of the instantaneous scheme of the electric-traction netware. The described approach makes it possible to improve the accuracy of modeling the dynamic modes of traction power supply sections operation, and also makes it possible to significantly improve the process of modeling diagnostic and control systems for electric rolling stock at the design stage, based on a more accurate model of dynamically changing input parameters of the electric-traction netware, depending on thei

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Anggraini, Zeni, Jaka Rachmadetin, Nazhira Shadrina, Sucipta Sucipta, and Heru Sriwahyuni. "Modeling Radiation Exposure from Normal Release of 137Cs Radionuclide to Groundwater for Post-Closure Assessment of Serpong Near Surface Disposal Demo Facility." IOP Conference Series: Earth and Environmental Science 927, no. 1 (2021): 012020. http://dx.doi.org/10.1088/1755-1315/927/1/012020.

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Abstract Near-surface disposal (NSD) has been applied in several countries to dispose of low-level radioactive waste. The demo plant of this disposal type is planned to be constructed in Serpong Nuclear Area, Banten. An assessment of radiation exposure is necessary to ensure the safety requirement of the facility in order to support this program. This study aims to estimate radionuclide migration from the proposed NSD demo facility to the environment and the corresponding total human dose using AMBER mathematical modeling. The representative radionuclide,137Cs, was selected because of its high

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Sokolovska, Zoia. "Simulation Models of Pharmaceutical Logistics." Economics: time realities 4, no. 74 (2024): 99–110. https://doi.org/10.15276/etr.04.2024.11.

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The article presents simulation modeling as a mathematical basis for the study of logistic systems. The object is pharmaceutical logistics – logistics chains of pharmaceutical companies. Attention is focused on the problems of functioning of domestic pharmaceutical logistics in the conditions of military realities. The expediency of using simulation modeling technologies to reproduce the changing, force majeure conditions of functioning of the supply channels of finished pharmaceutical products is substantiated. Models of one-level and two-level sales channels for pharmaceutical products, buil

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Dinh, T. H., I. K. Fomenko, O. E. Vazkova, and O. N. Sirotkina. "Investigation of the influence of extreme floods on the stability of protective dams (using the example of Hanoi city)." Engineering survey 12, no. 11-12 (2019): 26–34. http://dx.doi.org/10.25296/1997-8650-2018-12-11-12-26-34.

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According to the territorial development plans of the city of Hanoi, there is a need to build a new dam system to ensure the normal functioning of the riverside areas. Therefore, the solution of the problem of analyzing the causes of the loss of stability of the of dam slopes protecting the city from floods is of particular relevance. When assessing the possibility of dam failure as a result of a landslide process, the most important indicator is the appearance of cracks in the body of the dam. The possible mechanisms of loss of stability of the dam slopes as a result of changes in the hydrolo

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Brewington, Laura, Victoria Keener та Alan Mair. "Simulating Land Cover Change Impacts on Groundwater Recharge under Selected Climate Projections, Maui, Hawaiʻi". Remote Sensing 11, № 24 (2019): 3048. http://dx.doi.org/10.3390/rs11243048.

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This project developed an integrated land cover/hydrological modeling framework using remote sensing and geographic information systems (GIS) data, stakeholder input, climate information and projections, and empirical data to estimate future groundwater recharge on the Island of Maui, Hawaiʻi, USA. End-of-century mean annual groundwater recharge was estimated under four future land cover scenarios: Future 1 (conservation-focused), Future 2 (status-quo), Future 3 (development-focused), and Future 4 (balanced conservation and development), and two downscaled climate projections: a coupled model

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Sokolovska, Zoia. "Simulation Models of Pharmaceutical Logistics." Economics: time realities 4, no. 74 (2024): 99–110. https://doi.org/10.5281/zenodo.13851959.

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The article presents simulation modeling as a mathematical basis for the study of logistic systems. The object is pharmaceutical logistics – logistics chains of pharmaceutical companies. Attention is focused on the problems of functioning of domestic pharmaceutical logistics in the conditions of military realities. The expediency of using simulation modeling technologies to reproduce the changing, force majeure conditions of functioning of the supply channels of finished pharmaceutical products is substantiated. Models of one-level and two-level sales channels for pharmaceutical products

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43

Yoon, Hyunjun, Wonjin Baek, Wonchul Jeong, Chiun Jang, Jihoon Jeong, and Hwabin Ko. "Analysis of Field Applicability based on Installation of Reinforcement Material." Journal of the Korean Society of Hazard Mitigation 25, no. 2 (2025): 99–106. https://doi.org/10.9798/kosham.2025.25.2.99.

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Recently, the damage caused by slope destruction and landslides due to concentrated heavy rain and guerrilla rain owing to climate change has been rapidly increasing. The existing slope reinforcement method has limitations wherein the drainage function and shear strength increase are exerted by individual mechanisms, which causes difficulties in terms of constructability, economy, and maintenance. Therefore, in this study, the effect of changing the embedding angle of slope reinforcement on groundwater level change and stability was analyzed via a numerical analysis approach in modeling ground

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Jha, Madan K., Richard C. Peralta, and Sasmita Sahoo. "Simulation-Optimization for Conjunctive Water Resources Management and Optimal Crop Planning in Kushabhadra-Bhargavi River Delta of Eastern India." International Journal of Environmental Research and Public Health 17, no. 10 (2020): 3521. http://dx.doi.org/10.3390/ijerph17103521.

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Water resources sustainability is a worldwide concern because of climate variability, growing population, and excessive groundwater exploitation in order to meet freshwater demand. Addressing these conflicting challenges sometimes can be aided by using both simulation and mathematical optimization tools. This study combines a groundwater-flow simulation model and two optimization models to develop optimal reconnaissance-level water management strategies. For a given set of hydrologic and management constraints, both of the optimization models are applied to part of the Mahanadi River basin gro

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Safin, Artem I., Maksim I. Maksimov, and Timur D. Badaraev. "DEVELOPMENT AND IMPLEMENTATION OF DIGITAL TOOLS FOR MULTI-LEVEL OPTIMIZATION OF MANAGEMENT PROCESSES IN VARIOUS ECONOMIC SECTORS: MATHEMATICAL MODELING OF LOGISTICS RISKS." EKONOMIKA I UPRAVLENIE: PROBLEMY, RESHENIYA 3/11, no. 156 (2025): 43–55. https://doi.org/10.36871/ek.up.p.r.2025.03.11.005.

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This study is devoted to a comprehensive analysis of modern digital tools for multilevel optimization of management processes in logistics systems across various economic sectors, with a focus on mathematical modeling of risks. The paper presents a fundamental theoretical and methodological framework for optimizing logistics processes, including systematization of modern digital tools, methods of mathematical modeling, and risk prediction algorithms in the context of digital economic transformation. The analysis demonstrates that effective functioning of logistics systems under uncertainty req

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A.Kh., Usmonov. "CHANGES IN THE CONCENTRATION OF LIQUIDS WITH DIFFERENT DENSITIES ALONG THE FLOW LENGTH." ИННОВАЦИОННЫЕ НАУЧНЫЕ ИССЛЕДОВАНИЯ 2022. 11-3(23) (December 4, 2022): 52–60. https://doi.org/10.5281/zenodo.7395935.

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In this article researches the alternative engineering methods against salinity have been used in water-scarce conditions. Based on the requirements for desalination of the upper layer of underground water, irrigation of this layer in washing mode, finding moisture-retaining parameters of drainage and other methods were found and used. However, currently available methods cannot provide optimal drainage parameters and cannot remove mineral salts from deep groundwater. Because the concentration against the salinity of irrigated lands itself was adapted to the critical depth during this period.

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TYMCHYSHYN, VASYL, and FRANK OTOO. "ARCHITECTURE OF A SOFTWARE SYSTEM FOR SOIL POLLUTION PROCESSES MODELING AS A RESULT OF DIFFUSION OF NITROGEN DIOXIDE IN SOILS AND GROUNDWATER." Herald of Khmelnytskyi National University. Technical sciences 319, no. 2 (2023): 351–59. http://dx.doi.org/10.31891/2307-5732-2023-319-1-351-359.

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The work proposes a software architecture that will allow simulating the processes of soil pollution due to the diffusion of nitrogen dioxide in soils and groundwater. To achieve this goal, mathematical models were used to predict the dynamics of concentrations of harmful emissions, as well as a model of diffusion of nitrogen dioxide in the soil and reservoir. The use of mathematical models will allow predicting changes in concentrations of nitrogen dioxide at a certain point of pollution. In addition, the model of diffusion of nitrogen dioxide in the soil and reservoir will help to determine

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Rakisheva, D. S., B. G. Mukanova, and I. N. Modin. "SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION." EURASIAN JOURNAL OF MATHEMATICAL AND COMPUTER APPLICATIONS 8, no. 4 (2020): 69–82. http://dx.doi.org/10.32523/2306-6172-2020-8-4-69-82.

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Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Nu

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BERNAERTS, KRISTEL, ELS DENS, KAREN VEREECKEN, et al. "Concepts and Tools for Predictive Modeling of Microbial Dynamics." Journal of Food Protection 67, no. 9 (2004): 2041–52. http://dx.doi.org/10.4315/0362-028x-67.9.2041.

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Description of microbial cell (population) behavior as influenced by dynamically changing environmental conditions intrinsically needs dynamic mathematical models. In the past, major effort has been put into the modeling of microbial growth and inactivation within a constant environment (static models). In the early 1990s, differential equation models (dynamic models) were introduced in the field of predictive microbiology. Here, we present a general dynamic model-building concept describing microbial evolution under dynamic conditions. Starting from an elementary model building block, the mod

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Lemacha, Hassan, Abdellatif Maslouhi, and Moumtaz Razack. "Modeling of Transient Two Dimensional Flow in Saturated-Unsaturated Porous Media." European Scientific Journal, ESJ 13, no. 12 (2017): 195. http://dx.doi.org/10.19044/esj.2017.v13n12p195.

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We study the transient two-dimensional flow problems related to the recharge of groundwater using an approach based on the physics of water transfer in the whole domain, including both the saturated and the unsaturated zones. Such a domain is limited by the soil surface and by the lower impervious boundary of the aquifer. The flow problem is solved using a numerical iterative procedure based on the alternate directions implicit finite differences method. To simulate the water transfer in an unsaturatedsaturated porous medium, we developed a mathematical model based on a single flow equation us

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