Groundwater Resources Estimation in the Middle of Randublatung Groundwater Basin Based on Geoelectrical Investigation

Abstract The high groundwater use in the Randublatung Groundwater Basin area relates to groundwater abstraction for agriculture. Therefore, a question arises on how much groundwater resources in this area may support agricultural groundwater usage. This research has the objective to quantify the groundwater resources in this area. This research conducts a geoelectrical investigation to identify the aquifer’s lithology and observe the groundwater level. The research reveals that resistivity values of subsurface rock layers in the research area range from 0.13 to 124.86 Ωm. The aquifer layer consisted of two aquifer systems, with the hydraulic conductivity varies of the aquifer layer is 0.0001 cm/s until 0.01 cm/s. The aquifer layers estimated to be found at depths vary 5 – 90 m from the ground with thickness range from 10 to 70 m. Meanwhile, the aquiclude layers consisted of clay, silty clay, and sandy clay was estimated to be found at depths varies 0 – 50 m from the ground with thickness varies from 5 to 65 m. by combining those data with a hydraulic gradient of groundwater flow, the dynamic groundwater resources in the research area is estimated between 50 m3/day and 4,691 m3/day.

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Identifying anthropogenic effects into Doñana aquifer (SW Spain) through hydrogram clustering of piezometric database

10.5194/egusphere-egu2020-7830 ◽

2020 ◽

Author(s):

Carolina Guardiola-Albert ◽

Nuria Naranjo-Fernández ◽

Héctor Aguilera ◽

Esperanza Montero-González

Keyword(s):

Time Series ◽

Groundwater Level ◽

Groundwater Resources ◽

Data Series ◽

Time Series Clustering ◽

Missing Data Imputation ◽

Groundwater Levels ◽

Aquifer Systems ◽

Visual Clustering ◽

Selection Of

Nowadays, the application of time series clustering is increasing in hydrogeology works. Groundwater level long data series provides a useful record to identify different hydrological behaviors and to validate the conceptual model of groundwater flow in aquifer systems. Piezometers also register the response to any changes that directly affect the amount of available groundwater resources (recharge or exploitation).What are the expected variations of groundwater levels in an aquifer under high exploitation pressure? In this work, groundwater level time series from 160 piezometers in the hydrological years from 1975 to 2016 were analyzed. Especially, 24 piezometers are deeply studied. Data were preprocessed and transformed: selection of points, missing data imputation and data standardization. Visual clustering, k-means clustering and time series clustering were applied to classify groundwater level hydrographs using the available database. Six and seven groups of piezometers were identified to be associated with the different hydrofacies and extraction rates. Time series clustering was found to be the best method to analyze the studied piezometric database. Moreover, it was possible to characterize actual hydrodynamics, which will be useful for groundwater managers to make sustainable decisions.

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Deep Learning based assessment of groundwater level development in Germany until 2100

10.5194/egusphere-egu21-9590 ◽

2021 ◽

Author(s):

Andreas Wunsch ◽

Tanja Liesch ◽

Stefan Broda

Keyword(s):

Climate Change ◽

Groundwater Level ◽

Climate Models ◽

Groundwater Resources ◽

Groundwater Abstraction ◽

Water Shortages ◽

Entire Area ◽

Groundwater Levels ◽

The Past ◽

Skill Scores

Clear signs of climate stress on groundwater resources have been observed in recent years even in generally water-rich regions such as Germany. Severe droughts, resulting in decreased groundwater recharge, led to declining groundwater levels in many regions and even local drinking water shortages have occurred in past summers. We investigate how climate change will directly influence the groundwater resources in Germany until the year 2100. For this purpose, we use a machine learning groundwater level forecasting framework, based on Convolutional Neural Networks, which has already proven its suitability in modelling groundwater levels. We predict groundwater levels on more than 120 wells distributed over the entire area of Germany that showed strong reactions to meteorological signals in the past. The inputs are derived from the RCP8.5 scenario of six climate models, pre-selected and pre-processed by the German Meteorological Service, thus representing large parts of the range of the expected change in the next 80 years. Our models are based on precipitation and temperature and are carefully evaluated in the past and only wells with models reaching high forecasting skill scores are included in our study. We only consider natural climate change effects based on meteorological changes, while highly uncertain human factors, such as increased groundwater abstraction or irrigation effects, remain unconsidered due to a lack of reliable input data. We can show significant (p<0.05) declining groundwater levels for a large majority of the considered wells, however, at the same time we interestingly observe the opposite behaviour for a small portion of the considered locations. Further, we show mostly strong increasing variability, thus an increasing number of extreme groundwater events. The spatial patterns of all observed changes reveal stronger decreasing groundwater levels especially in the northern and eastern part of Germany, emphasizing the already existing decreasing trends in these regions

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Hydrogeology Potential of Hargorejo Area Kokap Subdistrict West Progo Regency

Angkasa: Jurnal Ilmiah Bidang Teknologi ◽

10.28989/angkasa.v12i2.772 ◽

2020 ◽

Vol 12 (2) ◽

Author(s):

T. Listyani R.A. ◽

Dianto Isnawan ◽

Ign. Adi Prabowo

Keyword(s):

Groundwater Flow ◽

Ph Value ◽

Shallow Groundwater ◽

Research Area ◽

The West ◽

Basin Boundary ◽

Geological Characteristics ◽

Dug Wells ◽

Groundwater Basin ◽

Basin Region

This research is a hydrogeological survey activity with the aim to determine the geological characteristics of groundwater in the Hargorejo area, Kokap Sub-district, West Progo. The study wants to know about the pattern of groundwater flow and water quality in the area. The northern part of the research area is included in the non-groundwater basin region of the West Progo Dome, while the southern part is included in Wates Groundwater Basin. Method of research is a field hydrogeological survey, to obtain geological and groundwater data. Groundwater flow pattern and quality analyses are based on groundwater data and pH, TDS and EC values. Groundwater can be obtained from springs or dug wells, with relatively shallow groundwater tables. The pattern of groundwater flow is generally to the south, with the H4 / H5 basin boundary type. Groundwater quality is quite good, with a pH value of 6.2 -7; TDS 191 - 558 ppm, and EC ranges from 279-783 µS / cm.

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Geochemical Evolution and Groundwater Flow System in Batujajar Groundwater Basin Area, West Java, Indonesia

Indonesian Journal on Geoscience ◽

10.17014/ijog.7.1.87-104 ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

Rudy Suhendar ◽

M. Sapari Dwi Hadian ◽

Budi Muljana ◽

Taat Setiawan ◽

Hendarmawan Hendarmawan

Keyword(s):

Groundwater Flow ◽

Flow System ◽

Geochemical Evolution ◽

West Java ◽

Groundwater Flow System ◽

Groundwater Basin ◽

Basin Area

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Towards aquifer deformation models integrating SAR remote sensing: preliminary land subsidence results using GEP tools

10.5194/egusphere-egu21-12806 ◽

2021 ◽

Author(s):

Guadalupe Bru ◽

Pablo Ezqerro ◽

Carolina Guardiola-Albert ◽

Marta Béjar-Pizarro ◽

Gerardo Herrera ◽

...

Keyword(s):

Remote Sensing ◽

Drinking Water ◽

Groundwater Flow ◽

Land Subsidence ◽

Surface Deformation ◽

Salt Water ◽

Groundwater Resources ◽

Groundwater Depletion ◽

Web Tool ◽

Aquifer Systems

Groundwater is a critical resource that provides fresh drinking water to at least 50% of the global population and accounts for 43% of all of the water used for irrigation (Siebert et al., 2010; UNESCO, 2012). A main consequence of groundwater depletion in overexploited aquifers is land subsidence, which ensues other impacts, such as increasing flooding risk (specially in coastal areas), damages to infrastructures and reduction of storage capacity in aquifer systems. Aquifer deformation and groundwater flow models are essential to design sustainable management strategies. In this context, A-DInSAR techniques provide valuable surface displacement data to understand the deformational behaviour of the aquifer and to characterise its properties.RESERVOIR project, which is part of the PRIMA programme supported by the European Union, aims to provide new products and services for a sustainable groundwater management model to be developed and tested in four water-stressed Mediterranean pilot sites. Each of them is representative of a different aquifer system flow scheme. They are located in Italy (coastal aquifer of Comacchio), Spain (Alto Guadalent&#237;n Basin), Turkey (Gediz River Basin) and Jordan (Azraq Wetland Reserve). The water usages of these aquifers are irrigation, drinking water and/or power generation. Each site is prone to different issues such as land subsidence, salt water intrusion, water pollution, over-exploitation and insufficient recharge.One of the primary objectives of the project is the use of advanced satellite-based Earth Observation (EO) techniques for the hydrogeological characterization and their integration into numerical groundwater flow and geomechanical models. This will lead to improve the knowledge about the current capacity to store water and the future response of aquifer systems to natural and human-induced stresses. Free Sentinel-1 SAR acquisitions available at the Copernicus Open Access Hub will be used to perform A-DInSAR processing in representative areas of each pilot site. Additionally, the InSAR processing tools of the Geohazards Exploitation Platform (GEP) funded by the European Space Agency, will be used for a first assessment of ground deformation. In this work we present the preliminary results obtained with Sentinel-1 images using the P-SBAS web tool on GEP (De Luca et al., 2015) at the four pilot sites.&#160;De Luca, C., Cuccu, R., Elefante, S., Zinno, I., Manunta, M., Casola, V., Rivolta, G., Lanari, R., and Casu, F., 2015, An on-demand web tool for the unsupervised retrieval of earth&#8217;s surface deformation from SAR data: The P-SBAS service within the ESA G-POD environment: Remote Sensing, v. 7, no. 11, p. 15630-15650.Siebert, S., Burke, J., Faures, J.-M., Frenken, K., Hoogeveen, J., D&#246;ll, P., and Portmann, F. T., 2010, Groundwater use for irrigation&#8212;a global inventory: Hydrology and earth system sciences, v. 14, no. 10, p. 1863-1880.UNESCO, 2012, World&#8217;s Groundwater Resources Are Suffering from Poor Governance, UNESCO Publishing: Paris, France, UNESCO Publishing.

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The Dynamics of Sea Tide-Induced Fluctuations of Groundwater Level and Freshwater-Saltwater Interface in Coastal Aquifers: Laboratory Experiments and Numerical Modeling

Geofluids ◽

10.1155/2019/6193134 ◽

2019 ◽

Vol 2019 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Elad Levanon ◽

Haim Gvirtzman ◽

Yoseph Yechieli ◽

Imri Oz ◽

Elad Ben-Zur ◽

...

Keyword(s):

Hydraulic Conductivity ◽

Groundwater Level ◽

Coastal Aquifer ◽

Unsaturated Zone ◽

Laboratory Experiments ◽

Time Lag ◽

Time Lags ◽

Saturation Degree ◽

Aquifer Systems ◽

Capillary Zone

Laboratory experiments were conducted in a vertical, two-dimensional, rectangular flow tank, simulating the response of a phreatic coastal aquifer to a sea tide. Imposed sinusoidal fluctuations of the saltwater level at one side of the flow tank caused three types of fluctuations: (a) hydraulic head throughout the aquifer, (b) saturation degree within the capillary fringe, and (c) salt concentration surrounding the freshwater-saltwater interface (FSI), all recorded by head, saturation, and salinity sensors, respectively. Significant time lags were observed both in the saturation degree within the unsaturated zone and in the salinity within the FSI. All measured values, recorded by the three types of sensors, were simulated and reproduced using a numerical model. The calibrated model was used for mapping the time lags throughout the aquifer. It was found that the time lag of saturation fluctuations within the unsaturated zone increased upward from the groundwater level as the unsaturated hydraulic conductivity decreased. Similarly, the time lag of salinity fluctuations within the FSI increased downward, with distance from the groundwater level. We interpret the low hydraulic conductivity at the capillary zone as the source of attenuation of both saturation and salinity, because both are controlled by the vertical advection of the whole freshwater body. This advection is significantly slower compared to the dynamics of pressure diffusion. The uniqueness of this study is that it provides quantitative data on the attenuation at the capillary zone and its effect on the salinity time lag in coastal aquifer systems.

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Study of historical groundwater level changes in two Belgian chalk aquifers in the context of climate change impacts

Geological Society London Special Publications ◽

10.1144/sp517-2020-212 ◽

2021 ◽

pp. SP517-2020-212

Author(s):

Pascal Goderniaux ◽

Philippe Orban ◽

Alain Rorive ◽

Serge Brouyère ◽

Alain Dassargues

Keyword(s):

Groundwater Level ◽

Groundwater Resources ◽

Summer Drought ◽

Aquifer Recharge ◽

Groundwater Abstraction ◽

Groundwater Levels ◽

Future Evolution ◽

Precipitation Decrease ◽

Chalk Aquifer ◽

The Impact

AbstractIn Southern Belgium, 23% of abstracted groundwater volumes are from chalk aquifers which represent strategic resources for the region. Due to their specific nature, these chalk aquifers often exhibit singular behaviour and require specific analysis. The quantitative evolution of these groundwater resources is analysed for the Mons Basin and Hesbaye chalk aquifers as a function of past evolution, in the short and long terms. Groundwater level time series exhibit decreases when analysed over different periods. This is particularly visible for the Hesbaye chalk aquifer when comparing the 1960-1990 and 1990-2020 periods. Such decreases are associated to observed temperature increase and a precipitation decrease, inducing a decrease of aquifer recharge, and a probable increase of groundwater abstraction in the adjacent catchment. Past evolution is also discussed considering recent winter and summer drought events. The aquifers exhibit long delays in response to recharge events, particularly where the thickness of the partially saturated zone plays a crucial role in observed delays. Regarding future evolution, simulations of the impact of climate changes using medium-high emission scenarios indicate a probable decrease of the groundwater levels over the Hesbaye chalk aquifer.

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Hydrofacies reconstruction of glaciofluvial aquifers and groundwater flow modelling in a densely urbanized area under changing climatic conditions

10.5194/hess-2017-555 ◽

2017 ◽

Cited By ~ 2

Author(s):

Mattia De Caro ◽

Giovanni B. Crosta ◽

Paolo Frattini ◽

Roberta Perico ◽

Giorgio Volpi

Keyword(s):

Climate Change ◽

Steady State ◽

Groundwater Flow ◽

Groundwater Level ◽

Urban Areas ◽

Global Climate ◽

Groundwater Resources ◽

Base Flow ◽

Stratigraphic Model ◽

Groundwater Flow Modelling

Abstract. Potential impacts of global climate changes on the groundwater are largely unknown, especially for densely populated areas where groundwater is heavily exploited for public and industrial supply. Hence, to better plan and manage the groundwater resources, medium-long term numerical modelling of groundwater flow, which takes into account climate change, population growth, and industrial and agricultural activities, is needed. The objective of this paper is to tackle three main issues: (1) the development of a robust hydro-stratigraphic model of a multi-aquifer system from a well logs database by means of a novel multi-dimensional approach which includes a hierarchical classification of the lithologies, the interpretation of cross-sections, and the interpolation of aquifer boundary surfaces; (2) the parametrization and calibration of both a steady state and a transient groundwater flow model, starting from empirical relationships (for unconfined aquifer) and step-drawdown and well tests (for semi-confined and confined aquifers) to define equivalent homogenous sub-units; and (3) the simulation of steady state and transient scenarios based on projections about global climate change and variation in abstraction and recharge rates. These issues are illustrated for the Milan metropolitan area (Northern Italy) and the conterminous Po Plain portion. The results of the model allow to analyse the major components of the regional groundwater system (i.e. public supply wells withdrawals, discharge to gaining rivers and springs, recharge from irrigation networks and vegetated areas, flow transfer between aquifers). The groundwater level rising observed in the last decades caused serious problems in the urban areas and a progressive increase in the base-flow towards the gaining rivers. Simulations including effects of future climate scenarios (2017–2030) indicate a further increase in groundwater level in the next decades at a lower rate (ca. 0.3 m/year) with respect to that of the 1970–2016 period (ca. 1 m/year), due to the combined action of decreasing withdrawals and recharge.

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Aplikasi Analisis Spasial Untuk Penentuan Zona Imbuhan Dan Zona Lepasan Airtanah, Cekungan Air Tanah (CAT) Karangkobar, Provinsi Jawa Tengah

Jurnal Ilmu Lingkungan ◽

10.14710/jil.16.2.162-172 ◽

2018 ◽

Vol 16 (2) ◽

pp. 162 ◽

Cited By ~ 1

Author(s):

Agus Harjanto ◽

Thomas Triadi Putranto ◽

Truman Simaremare

Keyword(s):

Groundwater Level ◽

Data Retrieval ◽

Discharge Zone ◽

Geological Condition ◽

Scoring Method ◽

Aquifer System ◽

The North ◽

Flow Through ◽

Groundwater Basin ◽

Basin Area

ABSTRAKCekungan Air Tanah (CAT) Karangkobar terletak di wilayah administrasi Kabupaten Banjarnegara dan Kabupaten Wonosobo. CAT Karangkobar memiliki luas sekitar 299,6 km2. Daerah ini terletak di daerah dengan kondisi geologi yang banyak dipengaruhi oleh aktivitas vulkanisme. Secara regional sistem akuifer pada daerah ini merupakan sistem akuifer dengan aliran air tanah melalui ruang antar butir dan rekahan. Tujuan dari penelitian ini adalah untuk mendeliniasi daerah imbuhan dan daerah lepasan air tanah di CAT Karangkobar. Pengambilan data lapangan dilakukan dengan mengamati kondisi geologi dan mengukur tinggi muka air tanah CAT Karangkobar. Penentuan zona imbuhan dan lepasan dilakukan dengan metode geospasial menggunakan perangkat lunak Surfer dan ArcGis. Metode ini dilakukan dengan pembobotan. Parameter yang digunakan dalam pembobotan ini terdiri dari 5 parameter, yaitu: kelulusan batuan, curah hujan, jenis tanah penutup, kemiringan lereng dan kedalaman muka air tanah tidak tertekan. Nilai maksimal yang didapat dari pembobotan ini adalah 65 sedangkan nilai minimal adalah 39. Daerah imbuhan berada pada nilai bobot 53-65, daerah ini berada dibagian utara CAT Karangkobar. Daerah lepasan berada pada nilai bobot 39-52, daerah ini berada pada bagian selatan CAT Karangkobar..ABSTRACTKarangkobar groundwater basin located in Banjarnegara District and Wonosobo District. Karangkobar groundwater basin area is about 299,6 km2. This area is located in a region with geological condition which is heavily affected by volcanism activity. Regionally, aquifer system in this region is aquifer system with groundwater flow through pore spaces and fractures. The purpose of this research is to deliniate recharge and discharge zone of groundwater in Karangkobar groundwater basin. Field data retrieval was done by observing geological condition and measuring groundwater level, in Karangkobar groundwater basin. Recharge and discharge zone determination is done by geospatial method using Surfer and ArcGis software. This method is done with scoring method. Parameters used in this scoring consists of 5 parameters: permeability of rock, rainfall, soil type, slope and depth of superficial groundwater level. Maximum value in this scoring is 65 and minimum value is 39. Recharge zone score is on 53-65, which is located in the north of Karangkobar groundwater basin with. Discharge zone score is on 39-52, which is located in the south of Karangkobar groundwater basin.Keywords: groundwater, Karangkobar groundwater basin, geospatial method, recharge and discharge zone.Sitasi: Harjanto, A., Putranto, T.T., dan Simaremare, T.(2018 Aplikasi Analisis Spasial Untuk Penentuan Zona Imbuhan Dan Zona Lepasan Airtanah, Cekungan Air Tanah (CAT) Karangkobar, Provinsi Jawa Tengah. Jurnal Ilmu Lingkungan, 16(2), 162-172, doi:10.14710/jil.17.2.162-172

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APLIKASI GEOSPASIAL ANALISIS UNTUK PENENTUAN ZONA IMBUHAN AIRTANAH DI CAT WONOSOBO, PROVINSI JAWA TENGAH

Jurnal Tataloka ◽

10.14710/tataloka.19.3.175-191 ◽

2017 ◽

Vol 19 (3) ◽

pp. 175 ◽

Cited By ~ 2

Author(s):

Thomas Triadi Putranto ◽

Wahju Krishna Hidajat ◽

Annita Kusuma Wardhani

Keyword(s):

Hydraulic Conductivity ◽

Groundwater Recharge ◽

Groundwater Management ◽

Groundwater Level ◽

Soil Type ◽

Soil Cover ◽

Groundwater Discharge ◽

Geospatial Analysis ◽

Discharge Zone ◽

Groundwater Basin

Groundwater is the valuable resources for supplying daily necessity of human’s life that is going to increase in line with the increasing number of population. Therefore, groundwater needs to be well managed. Groundwater management can be done thoroughly within a groundwater basin for defining groundwater recharge zone. The groundwater recharge zone was conducted by applying geospatial analysis using weighted and scoring approach. This method was accomplished by overlaying the score of some parameters (hydraulic conductivity, precipitation, soil cover, slope, and groundwater depth of water table) using ArcGIS 10.3 software. The parameters were permeability of rocks, rainfall, soil type, slope and depth of superficial groundwater level. The result of geospatial analysis can be divided into two zones which are groundwater recharge zone and groundwater discharge zone.

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