scholarly journals Quick analysis of the characteristic hydrogeological parameters of an aquifer, using empirical formulas and the implementation of the clay substrate map: the case study of the shallow aquifer of the S. Eufemia Lamezia plain (Central Calabria - Italy).

2018 ◽  
Author(s):  
Enzo Cuiuli
Keyword(s):  
Shallow Aquifer ◽  
Hydrogeological Model ◽  
Empirical Formulas ◽  
Drilling Depth ◽  
Construction Methods ◽  
Hydrogeological Parameters ◽  
Saturated Layer ◽  
Hydrogeological Study ◽  
Well Data ◽  
Definition Of

In Calabria, there are few works of quantitative hydrogeology. Therefore, the present study aims to provide a contribution to the hydrogeological knowledge of the region and, in particular, of the shallow aquifer of the S. E. Lamezia plain, characterized by a multi-layer aquifer. The study area is located in the Tyrrhenian sector of the “Graben of Catanzaro, an important tectonic structure in the wider context of the Calabrian Peloritano Arc. The acquisition of new lithostratigraphic and hydrogeological data, related to drillings for water research, has allowed expanding the knowledge of the phreatic aquifer of S. E. Lamezia plain. In the study area, there is a high number of abusive wells without data, not declared and are made without a basic hydrogeological study. Therefore, they are free of flow rate tests and information about the drilling depth, stratigraphy and construction methods. However, a certain numbers of wells is authorized and the available data are: Stratigraphy, static and dynamic level, critical flow rare (Qc) and, in some cases, also the specific lowering (Δs). Therefore with these data, using empirical formulas, a quick analysis of the hydrogeological parameters characteristic of the aquifer it was done. Moreover, interpolating the stratigraphic data with a geostatistic method the map of the clay substrate was returned. In particular, the Transmissivity [T] and the Storage coefficient [S] were calculate with empirical formulas using well data. From the Transmissivity. the Hydraulic conductivity [K] is derived. The hydraulic gradient from the piezometric map graphically is calculated. The thickness of the saturated layer (b) of the aquifer was obtained directly from the stratigraphy of the wells surveyed or, in those cases in which stratigraphy was not known, from the differences between the values obtained from the isopiezometric map and the map of the clay substrate. In conclusion, this study, with the implementation of the clay substrate map and a quick analysis of the main hydrodynamic parameters, aims to provide a contribution to the definition of the hydrogeological model of the shallow aquifer of the Plain that represents a fundamental tool for the protection and the correct management of the water resource.

scholarly journals Analysis of the data of hydrogeochemical monitoring of groundwater in the North Sivash artesian basin

2019 ◽  
pp. 64-71
Author(s):  
K. Ya. Bulakhova ◽  
S. M. Sudarikov
Keyword(s):  
Research Area ◽  
Geological Structure ◽  
Hydrogeological Model ◽  
Artesian Basin ◽  
Correlation And Regression Analysis ◽  
The North ◽  
Gypsum Content ◽  
Definition Of ◽  
Aquifer Complex ◽  
Made In

The results of hydrogeochemical monitoring of the Sarmat-Meotis-Pontic sediments aquifer complex of the North Sivash artesian basin have been analyzed. The analysis based on a routine observations for 16 producing wells. The observations were made in the period from 2014 to 2017 years. A correlation and regression analysis has been made for definition of dependencies between changes in the concentrations of the normalized components. The results obtained allow us to evaluate the main factors of formation of the chemical composition of groundwater. At the present stage, metamorphosed waters are pulled up from the lower strata of the complex, that leads to an increase in the amount of mineralization. The formation of sulphate waters is primarily associated with the peculiarities of the geological structure, namely, the high gypsum content of quaternary deposits and the presence of hydraulic connection with the overlying aquifers. One of the reasons for the formation of sulphate waters is the anthropogenic impact associated with the close location of the acid accumulator containing sulfur tailing. The results obtained allow us to proceed to the next stage of the survey — the creation of a natural hydrogeological model of the research area and the carrying of the thermodynamic modeling.

scholarly journals ASSESSMENT OF CHANGES IN THE HYDROGEOLOGICAL CONDITIONS CAUSED BY WET-BASED CONSERVATION OF THE STYLSKYI QUARRY OPERATED BY “DOKUCHAEVSK FLUX AND DOLOMITE COMPLEX” PJSC USING MATHEMATICAL MODELLING

2021 ◽  
pp. 17-34
Author(s):  
Yu.F. Rudenko ◽  
V.M. Shestopalov ◽  
Iu.A. Negoda ◽  
O.V. Gural
Keyword(s):  
Mathematical Modelling ◽  
Water Intake ◽  
Raw Materials ◽  
Research Area ◽  
Coal Industry ◽  
Hydrogeological Model ◽  
Mining Operations ◽  
Hydrogeological Parameters ◽  
Hydrogeological Conditions ◽  
Water Outflow

Extraction of minerals significantly affects the hydrogeological conditions of the environment. Active development of mining operations in the Donbas region determined the dominant influence of technogenic changes in geological environment on the formation of modern ecological conditions in the region. This applies not only to coal mining but also raw materials extraction (dolomites, limestone) for metallurgical plants mostly by quarrying. Recently, a significant environmental problem in the region has been the mines and quarries closure, envisaged by the program for restructuring the coal industry of Ukraine. Closure of mines or quarries through wet-based conservation is the least financially expensive, although it significantly increases the technogenic load on the natural environment. The object of research involved groundwater and surface water within the area of the Stylskyi and Skhidnyi (Vostochnyi) quarries of the “Dokuchaevsk flux-dolomite complex” PJSC, as well as Kipucha Krynytsa and Shevchenkivskyi water intake structures. The goal of research was to forecast changes in the hydrogeological conditions under the influence of wet-based conservation of the Stylskyi quarry. To achieve this goal, hydrogeological methods, mathematical modelling, and expert assessments were used. Consequently, a hydrogeological model of the research area was created, its functional correspondence to the natural-anthropogenic conditions was confirmed, and calculation hydrogeological parameters were specified. As a result, the forecast of changes in the hydrogeological conditions under the influence of wet-based conservation of the Stylskyi quarry was made. In particular, the following issues were determined: the dynamics of quarry flooding; the influence of this process on changes in water inflows to the Skhidnyi (Vostochnyi) quarry, Kipucha Krynytsa and Shevchenkivskyi water intake structures; possible flooding of settlements and swamping of the research area; changes in chemical composition and groundwater salinity; time of quarry draining at various intensity of water outflow to resume mineral production in case of need. We would like to emphasize that the forecasts made should be used when designing partial or full flooding of the Stylskyi quarry.

scholarly journals Hydrogeological setting of a Rome city sector: shallow groundwater in the right side of Tiber River inside the G.R.A highway

2019 ◽  
Author(s):  
Adele Clausi ◽  
Roberto Mazza ◽  
Francesco La Vigna ◽  
Isidoro Bonfà
Keyword(s):  
Groundwater Resources ◽  
Shallow Groundwater ◽  
Hydrogeological Model ◽  
Detailed Model ◽  
Groundwater Flow Systems ◽  
Hydrogeological Study ◽  
Tiber River ◽  
Hydrogeological Map ◽  
The Right ◽  
First Time

This paper presents a detailed hydrogeological study of a Rome city sector, in the right side of Tiber River, inside the G.R.A. highway. A hydrogeological model of this city sector has been developed through geologic-stratigraphical analysis also of data provided by the Environmental Protection Department of Roma Capitale (Municipality of Rome) and the observation of historical topographic and thematic maps. This model is more detailed than the most recent Hydrogeological Map of Rome (1:50.000 scale), published in 2015, and allowed identifying the shallowest groundwater flow systems for the first time. This detailed model can be a very useful tool for agencies and administrations managing the protection of groundwater resources.

Multivariate statistical analyses applied to seismic facies recognition

Geophysics ◽  
1988 ◽  
Vol 53 (9) ◽  
pp. 1151-1159 ◽  
Author(s):  
Jean Dumay ◽  
Frederique Fournier
Keyword(s):  
Seismic Stratigraphy ◽  
Seismic Facies ◽  
Second Step ◽  
Multivariate Statistical Analyses ◽  
Multivariate Statistical ◽  
Seismic Parameters ◽  
Data Analyses ◽  
Well Data ◽  
Definition Of ◽  
Reservoir Facies

One of the most important goals of seismic stratigraphy is to recognize and analyze seismic facies with regard to the geologic environment. The first problem is to determine which seismic parameters are discriminant for characterizing the facies, then to take into account all those parameters simultaneously. The second problem is to be sure that there is a link between the seismic parameters and the geologic facies we are investigating. This paper presents a methodology for automatic facies recognition based upon two steps. The first, or learning step, begins with the definition of learning seismic traces for each facies we wish to recognize. The choice of learning traces is based upon either well data or a seismic stratigraphic interpretation. A large number of seismic parameters are then computed from the learning traces; multidimensional analyses are carried out in order to validate the choice of learning traces and to select, among all the available parameters, those that discriminate best. At this stage, a modeling step may be carried out to relate the seismic parameters to the geologic features. The second step is a predictive one which allows automatic facies recognition. We compute the previously chosen discriminant parameters on unknown seismic traces and classify the unknown traces with regard to the learning traces. We develop the methodology and successfully apply it to two examples of reservoir facies recognition. Our main conclusion is that seismic traces contain geologic information that can be extracted by multivariate data analyses of a large number of seismic parameters. Automatic facies recognition is reliable and fast; the derived facies map has the great advantage of combining simultaneously several discriminant parameters.

scholarly journals Numerical simulation of the filtration process in the right-bank of the river Don for protection the buildings against rise of groundwater in the city of Rostov-on-Don

2019 ◽  
Author(s):  
А.В. Гридневский
Keyword(s):  
Numerical Simulation ◽  
Boundary Conditions ◽  
Soil Mass ◽  
Geological Structure ◽  
Hydrogeological Model ◽  
Valley Slope ◽  
Hydrogeological Parameters ◽  
Geological Conditions ◽  
The Right ◽  
The City

Строительство на правобережье реки Дон в г. Ростове-на-Дону сопряжено с риском подтопления и высачивания подземных вод. Для обеспечения гидрогеологических прогнозов разработана численная гидрогеологическая модель склона речной долины. Она характеризует геологическую структуру, граничные условия подземного потока и параметры водопроницаемости грунтов. Идентификация гидрогеологических параметров и интенсивности влияния граничных условий выполнены методом многовариантного численного моделирования. Оценены притоки воды к дренажным сооружениям их зависимость от техногенной инфильтрации. Определены параметры неглубоко залегающих скифских глин, при которых они способствуют локальному подъему уровня подземных вод. В статье анализируются гидродинамические процессы в приустьевой части реки Темерник правобережья Дона с целью детализации представлений о гидрогеологической структуре массива грунтов, оценки параметров фильтрации и граничных условий. Полученные результаты использованы для определения водопритока в зоне высачивания к дренажным сооружениям, сопровождающим строительство. Применяемый подход основан на численном гидрогеологическом моделировании, системно учитывающем параметры геофильтрации в их взаимосвязи. Он позволяет учесть факторы геоэкологического риска для разработки эффективных решений в борьбе с подтоплением. Самыми древними отложениями, определяющими инженерно-геологические условия города, являются морские глины нижне-сарматского яруса (N1s1) мощностью 10–15 м, служащие региональным водоупором. Глины перекрыты комплексом (15÷20 м) водопроницаемых трещиноватых известняков сарматского яруса (N1s2), переслаивающихся известняков и песков мэотического (N1m) и понтического ярусов (N1p). Завершается  толща красно-бурыми плотными отложениями (5÷15 м) скифских глин (QЕsk). Строительство в зоне высачивания создает подпор подземных вод и порождает риск ухудшения геотехнических условий эксплуатации зданий и сооружений: подтопление заглубленных конструкций, смещение по склону  водонасыщенного песчано-глинистого грунта. Construction on the right bank of the river of Don in Rostov-on-Don is associated with a risk of flooding and seepage. To provide hydrogeological forecasts, a numerical hydrogeological model of the river valley slope has been developed. It characterizes the geological structure, the boundary conditions of the underground flow, and the parameters of the permeability of the soils. The identification of hydrogeological parameters and the intensity of the influence of boundary conditions are performed by the method of multivariate numerical simulation. Inflows of water to drainage structures are estimated, their dependence on man-caused infiltration. According to calculations, shallow-lying Scythian clays provide a local rise of the groundwater level. The article analyzes the hydrodynamic processes in the mouth of the Temernik river on the right bank of the Don with the aim of detailing the hydrogeological structure of the soil mass and estimating filtration parameters and boundary conditions. The obtained results were used to determine the water inflow in the seepage area to the drainage facilities accompanying the construction. The mentioned approach is based on numerical hydrogeological modeling, systematically taking into account the parameters of geological filtration in their relationship. It allows taking into account the factors of geoecological risk for the development of effective solutions to protect against flooding. The oldest sediments that determine the engineering and geological conditions of the city are the sea clays of the Lower Sarmatian layer (N1s1) with a thickness of 10–15 m, serving as a regional aquifer. Clays are covered with a complex (15–20 m) of permeable fractured limestones of the Sarmatian layer (N1s2), interbedded limestones and sands of the Meotian (N1m) and Pontian layers (N1p). The stratum ends with red-brown dense sediments (5–15 m) of Scythian clays (QЕsk). Construction in the outflow zone creates a groundwater ascent and generates the risk of deterioration of the geotechnical conditions for the operation of buildings and structures: flooding of buried structures, displacement along the slope of water-saturated sandy-clay soil.

VEgetation NUtrient-retention Service (VENUS) index: an indicator to assess favourable conditions for nutrient retention by vegetation.

2020 ◽  
Author(s):  
Davide Murgese
Keyword(s):  
Water Quality ◽  
Riparian Vegetation ◽  
Nutrient Retention ◽  
Water Bodies ◽  
Complete Analysis ◽  
Retention Performance ◽  
Hydrogeological Model ◽  
Management Scenarios ◽  
Management Measures ◽  
Definition Of

<p>Ecosystems role in preserving water resources is acknowledged by EU Water Framework Directive 2000/60/EC and by Groundwater Directive 2006/118/EC. In this view nutrient concentration represent a critical aspect with regard to water quality and eutrophication. Nitrate pollution is specifically addressed by the Nitrate Directive 91/676/EEC, which provides nitrate management rules for farming activities, defines nitrate vulnerable zones and gives indications on nitrate monitoring in water bodies.</p><p>To preserve water quality levels an important role is played by Riparian Buffer Zones (RBZ) through the provision of the Ecosystem Service (ES) nutrient retention, the uptake process operated by plant roots. Research has shown how ES valuation is a very effective approach to support land management process, as it allows a better understanding of the importance of the role of ecosystems in guaranteeing wellbeing conditions for human communities and for the environment.</p><p>In order to perform a complete assessment of ES, the use of maps only providing information on processes occurring at/above the surface (e.g land use maps, or ecosystem maps, or ecosystem function maps) does not allow a complete analysis of underground dynamics.</p><p>In the case of the valuation of the ES “nutrient retention” provided by RBZ it is necessary to include the hydrogeological model and its links with the riverine network. The simple presence/absence of vegetation, or even a detailed vegetation classification map, cannot provide a complete description of all conditions required to fully assess this ES, as information on groundwater flow, sediments and soils characteristics is needed.</p><p>For the Riparian Vegetation Management Plan of the Gesso Stura Riverine Park a specific index to study vegetation contribution to nutrient retention was introduced: the VEgetation NUtrient-retention Service (VENUS) Index. This index provides land managers a semi-quantitative indication on the spatial distribution of “best conditions” (suitability map) for nutrient retention by vegetation; it is based on a simple set of parameters representing the main factors controlling the interactions between vegetation roots and water flows (runoff and groundwater) from surrounding areas towards water bodies.</p><p>The application of the VENUS Index improved the definition of management measures for riparian vegetation and allowed reaching the following results: (1) identification of homogeneous sectors in terms of RBZ relevance for nutrient retention; (2) assessment of different RBZ management scenarios with regard to nutrient retention performance; (3) definition of specific management measures to preserve and/or foster the provision of nutrient retention.</p>

Evaluation of Shallow Groundwater Quantity in Harbin by Numerical Modeling

2011 ◽  
Vol 255-260 ◽  
pp. 2745-2750
Author(s):  
Chang Lei Dai ◽  
Zhi Jun Li ◽  
Shao Min Du ◽  
Chun He Liu
Keyword(s):  
Numerical Modeling ◽  
Groundwater Modeling ◽  
Groundwater Resources ◽  
Shallow Groundwater ◽  
System Structure ◽  
Shallow Aquifer ◽  
Hydrogeological Model ◽  
Aquifer System ◽  
Structure Boundary ◽  
Groundwater Quantity

In order to complete the geological survey of Harbin, it is necessary to understand the regime and law of groundwater in Harbin with the method of groundwater numerical modeling which requires the evaluation of groundwater resources quantity as a basic and critical step. Based on the analysis of hydrogeological conditions of the shallow aquifer in Harbin which includes the characteristics of aquifer system structure, boundary conditions, groundwater regime and recharge and discharge, a conceptual hydrogeological model has been built up with GMS (Groundwater Modeling System). With the numerical simulation model transferred by the conceptual model, the total amounts of renewable groundwater resources under different precipitation frequencies have been calculated. The result not only illustrates that the shallow aquifer in Harbin has certain potential in development and utilization but also provides some reference for managing a highly precise groundwater quantity evaluation by groundwater numerical modeling techniques.

STUDIES OF GEOLOGICAL CONDITIONS AND THE ASSESSMENT OF AQUIFER PROPERTIES FOR THE MODEL STUDIES OF GROUNDWATER FLOW IN THE GRUDZIĄDZ AREA

2018 ◽  
Vol 471 ◽  
pp. 51-60
Author(s):  
Izabela JAMORSKA ◽  
Arkadiusz KRAWIEC ◽  
Marek MARCINIAK
Keyword(s):  
Negative Impact ◽  
Field Work ◽  
Office Work ◽  
Hydrogeological Model ◽  
Model Studies ◽  
Hydrogeological Parameters ◽  
Efficiency Assessment ◽  
Geological Conditions ◽  
Observation Wells ◽  
Intake Water

The paper presents the results of a preliminary study of geology and hydrogeological conditions of a Grudziądz groundwater intake. The focus of the study was to develop a conceptual model that will be used in further investigation to create a hydrogeological model. In the intake area two multi-aquifer formations have been distinguished: Quaternary and Paleocene-Cretaceous. The Quartenary multi-aquifer formation, which consists of two aquifers separated by poorly permeable rocks, is primary utility. Groundwater in the Paleocene-Cretaceous aquifer has an elevated mineral content, which makes it not usable. The intake is located near Grudziądz and areas of intense farming, which leads to a hazard of anthropopressure, and may have a negative impact on the groundwater quality and quantity. In-office work conducted for the preparation of article included gathering and description of archival data from over 120 years of intake existence. Data from 53 hydrogeological boreholes have been analyzed. In 2017, field work was also conducted, including several measurements of water table in wells and piezometers of the intake. Water samples have also been collected for chemical analyses. An efficiency assessment of some observation wells has been made, establishing their hydrogeological parameters using the PARAMEX method.

scholarly journals Deriving Natural Background Levels of Arsenic at the Meso-Scale Using Site-Specific Datasets: An Unorthodox Method

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 452
Author(s):  
Maria Filippini ◽  
Chiara Zanotti ◽  
Tullia Bonomi ◽  
Vito G. Sacchetti ◽  
Alessandro Amorosi ◽  
...  
Keyword(s):  
Local Scale ◽  
Shallow Aquifer ◽  
Small Scale ◽  
Monitoring Networks ◽  
Natural Background ◽  
Site Specific ◽  
Background Levels ◽  
Polluted Sites ◽  
Definition Of ◽  
Meso Scale

Arsenic is found in groundwater above regulatory limits in many countries and its origin is often from natural sources, making the definition of Natural Background Levels (NBLs) crucial. NBL is commonly assessed based on either dedicated small-scale monitoring campaigns or large-scale national/regional groundwater monitoring networks that may not grab local-scale heterogeneities. An alternative method is represented by site-specific monitoring networks in contaminated/polluted sites under remediation. As a main drawback, groundwater quality at these sites is affected by human activities. This paper explores the potential for groundwater data from an assemblage of site-specific datasets of contaminated/polluted sites to define NBLs of arsenic (As) at the meso-scale (order of 1000 km2). Common procedures for the assessment of human influence cannot be applied to this type of dataset due to limited data homogeneity. Thus, an “unorthodox” method is applied involving the definition of a consistent working dataset followed by a statistical identification and critical analysis of the outliers. The study was conducted in a highly anthropized area (Ferrara, N Italy), where As concentrations often exceed national threshold limits in a shallow aquifer. The results show that site-specific datasets, if properly pre-treated, are an effective alternative for the derivation of NBLs when regional monitoring networks fail to catch local-scale variability.

Sign in / Sign up

Export Citation Format

Share Document