Research of Data Sequencesof Groundwater Levels with Gaps

Tymkiv, M.; Kasiyanchuk, D.

doi:10.12911/22998993/99744

Cited by 7 publications

(3 citation statements)

References 4 publications

(5 reference statements)

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“…This option is widely used to fill gaps in the dataset (Bielenki et al, 2018; Khouni et al, 2021; Yang et al, 2020). Other studies have used specific frameworks and methods to address the problem of missing data, such as multiple imputations, the full information maximum likelihood, and the expectation maximization algorithm (Carpenter & Smuk, 2021; Dong & Peng, 2013; Ren et al, 2019; Tymkiv & Kasiyanchuk, 2019).…”

Section: Methodsmentioning

confidence: 99%

Groundwater modelling of a shallow aquifer for the assessment of water logging: A case study of the Cebala‐Borj Touil irrigation perimeter, northern Tunisia

Rzigui

Bogacki

Hörmann

et al. 2022

Irrigation and Drainage

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The Cebala-Borj Touil (Cebala) Plain in Tunisia is a large perimeter with an area of 3,200 ha. In 1990, a drainage and irrigation system was installed. The groundwater system is complex due to the proximity to the sea, the low slope, and the low performance of natural drainage. It is characterized by shallow groundwater and soil water logging. The flooded area is controlled by natural and artificial factors. The natural parameters are the flat slope and the soil texture. The man-made problems are caused by inappropriate irrigation and drainage deficiency. The numerical groundwater flow simulation model FEFLOW (Finite Element Subsurface Flow System) was used to simulate the groundwater depth variability. The calculated water table depth ranged from less than 0.5 m from the ground surface to more than 8 m. Based on the calibrated model, several management scenarios were investigated to study the possibilities to mitigate the problem of water logging in the perimeter. The model results showed that improving the drainage efficiency and reducing the irrigation amounts could solve the water logging problem, but not entirely. For the low flooded parts, a pumping option could be considered. The final management scheme might include the combination of all the tested management scenarios.

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Section: Methodsmentioning

confidence: 99%

Groundwater modelling of a shallow aquifer for the assessment of water logging: A case study of the Cebala‐Borj Touil irrigation perimeter, northern Tunisia

Rzigui

Bogacki

Hörmann

et al. 2022

Irrigation and Drainage

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“…During abnormal rainfall, there is a strong fluctuation of groundwater. The rocks below the groundwater level are fully hydrated, have high pore pressure, and are a potential mirror of rock sliding [Davybida et al, 2018;Tymkiv, 2019]. Groundwater is confined to sandy, sandyloamy rocks (in river valleys) and pebbly deposits with sandy and loamy aggregates, covered by loess loams and, directly, in loess loams.…”

Section: Solar Activitymentioning

confidence: 99%

The Long-Term Prediction of Landslide Processes within the Precarpathian Depression of the Cernivtsi Region of Ukraine

Hablovskyi¹,

Hablovska²,

Shtohryn³

et al. 2023

J. Ecol. Eng.

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The purpose of this publication was the long-term forecasting of the landslide processes activation for the territory of the Precarpathian depression within the Chernivtsi region, taking into account the complex effect of natural factors. On the basis of statistical analysis and processing of long-term observations of landslide activation and natural time factors in particular solar activity, seismicity, groundwater levels, precipitation and air temperature, the relationship was analysed, the main periods of landslide activation were determined, the contribution of each time factor to the complex probability indicator of landslide development was estimated and long-term forecasting was carried out. An analysis of the influence of geomorphology on the landslide development was performed by using GIS MapІnfo. By means of cross-correlation, Fourier spectral analysis, the periodicities were analysed and the relationships between the parameters were established. It was found that the energy of earthquakes precedes the activation of landslides by 1 year, which indicates the "preparatory" effect of earthquakes as a factor that reduces the stability of rocks. The main periodicities of the forecast parameters of 9-11, 19-21, 28-31 years were highlighted, which are consistent with the rhythms of solar activity. The forecasting was carried out using artificial neural networks and the prediction function of the Mathematical package Mathcad, based on the received data, the activation of landslides is expected in 2023-2026, 2030-2035, 2040-2044 with some short periods of calm. The main periods of the dynamics of the time series of landslides and natural factors for the territory of the Precarpathian depression within the Chernivtsi region were determined, and a long-term forecast of landslides was made. Taking into account the large areas of the spread of landslide processes, forecasting the likely activation is an important issue for this region, the constructed predictive time models make it possible to assess the danger of the geological environment for the purpose of early warning and making management decisions aimed at reducing the consequences of a natural disaster.

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“…Research and analysis of data on groundwater levels with gaps involve the creation of a time forecast model per groundwater levels for various regimes and types of groundwater [Tymkiv and Kasiyanchuk, 2019]. For groundwater in the territory of Kosovo, the groundwater level was monitored and a hydrogeological computer model designed to determine the source protection zones was created [Osmanaj et al, 2021].…”

Section: Introductionmentioning

confidence: 99%

The Zonality of Underground Water Supply Sources for Pastures in the West Kazakhstan Region

Ongayev¹,

Denizbayev²,

Умбеткалиев³

et al. 2022

J. Ecol. Eng.

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Research of Data Sequencesof Groundwater Levels with Gaps

Abstract: The purpose of the scientific paper is to analyze the methods of filling the time sequences, which have gaps, as well as creation of the new model to conduct the time forecast according to the groundwater levels for the area with the

Cited by 7 publications

References 4 publications

Groundwater modelling of a shallow aquifer for the assessment of water logging: A case study of the Cebala‐Borj Touil irrigation perimeter, northern Tunisia

Groundwater modelling of a shallow aquifer for the assessment of water logging: A case study of the Cebala‐Borj Touil irrigation perimeter, northern Tunisia

The Long-Term Prediction of Landslide Processes within the Precarpathian Depression of the Cernivtsi Region of Ukraine

The Zonality of Underground Water Supply Sources for Pastures in the West Kazakhstan Region

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