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

2018 ◽  
Vol 16 (2) ◽  
pp. 162 ◽  
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

scholarly journals Hydrogeological Conceptual Model in the Middle of Randublatung Groundwater Basin

2021 ◽  
Vol 926 (1) ◽  
pp. 012078
Author(s):  
D L Setyaningsih ◽  
K D Setyawan ◽  
D P E Putra ◽  
Salahuddin
Keyword(s):  
Groundwater Flow ◽  
Conceptual Model ◽  
Unconfined Aquifer ◽  
Primary Data ◽  
Essential Information ◽  
Aquifer System ◽  
The North ◽  
Shallow Wells ◽  
Groundwater Basin ◽  
Constant Head

Abstract Randublatung groundwater basin is one of the groundwaters basins with massive utilization of groundwater pumping. However, the knowledge of the comprehensive hydrogeological system in this groundwater basin is limited, so this research aims to determine a comprehensive hydrogeological conceptual model of the Randublatung groundwater basin. The methodology was conducted by collecting secondary and primary data of deep and shallow wells to evaluate boundaries of pattern and direction of groundwater flow and develop the aquifer system’s geometry. The result shows that the groundwater flow boundaries are Grogol River in the west, Wado River in the East, Bengawan Solo river in the South as a river boundary, and Rembang Mountains in the North as a constant head boundary. Therefore, groundwater flows from the hills area to the Bengawan Solo River and the north as the river’s flow. Based on the log bor evaluation, the aquifer system of the study area consist of an unconfined aquifer with a maximum thickness of 20 m and three layers of confined aquifers with thickness vary between 8 to 60 m. the hydraulic conductivity of the aquifers depends on the aquifer’s lithology range from sand, gravel, limestone, and sandstone. This hydrogeological conceptual model provides essential information for numerical groundwater models in the middle of the Randublatung groundwater basin.

scholarly journals The Effect Of Rainfall Relationship periode 2003 – 2013 Of Groundwater South Jakarta Region

2020 ◽  
Vol 11 (3) ◽  
pp. 125
Author(s):  
Arini Dian ◽  
Nana Sulaksana ◽  
A. Asseggaf
Keyword(s):  
Groundwater Level ◽  
Rainy Season ◽  
Rainfall Intensity ◽  
Rainfall Event ◽  
Clean Water ◽  
Aquifer System ◽  
Groundwater Levels ◽  
Groundwater Level Fluctuations ◽  
Fine Grained ◽  
Groundwater Basin

ABSTRAKKebutuhan air bersih di Jakarta sangat meningkat sehingga pemerintah daerah mulai melakukan pengamatan muka airtanah. Penelitian ini dilakukan dengan menganalisis fluktuasi muka airtanah pada AWLR, intensitas curah hujan, dan penampang bawah permukaan pada beberapa buah titik logbor selama tahun 2003 - 2013 di wilayah Jakarta Selatan. Jumlah curah hujan di daerah penelitian berkisar antara 0,2 - 831,4 mm/bulan. Dari data AWLR dapat diketahui ketinggian muka airtanah berkisar antara 9,29 - 13,97 m aml, terdangkal terjadi pada bulan Oktober - Febuari (ketika musim penghujan) dan ketinggian muka airtanah terdalam berkisar antara14,60 - 20,41 m aml terjadi pada bulan Maret - September (ketika musim kemarau). Penelitian ini dilakukan untuk mengidentifikasi adanya pengaruh hubungan curah hujan dan muka airtanah dengan karakteristik sistem akuifer yang berada pada daerah penelitian sekitarnya khususnya di Jakarta Selatan. Berdasarkan analisis tenggang waktu dan fluktuasi muka airtanah yang dipengaruhi oleh intensitas curah hujan.Serta adanya lapisan akuitar pada penampang geologi dan posisi muka airtanah yang terdapat dibagian atas lapisan akuifer, maka dapat dikatakan bahwa sistem akuifer yang terdapat di daerah penelitian bersifat semi tertekan. Sistem akuifer tersebut pada bagian atasnya merupakan material berbutir halus (akuitar) sehingga airtanah masih memungkinkan untuk bergerak di dalamnya.Kata kunci: airtanah, AWLR, curah hujan, fluktuasi, JakartaABSTRACTThe need for clean water in Jakarta has increased significantly, so the groundwater levels of Jakarta Groundwater Basin need to be researched. This research was conducted by analyzing the fluctuation of the groundwater level using the AWLR data, rainfall intensity, and subsurface sections to several logbor during the year of 2003 - 2013 in South Jakarta area. Rainfall event in the area is in range of 0.2 mm/year up to 831.4 mm/year. From the AWLR data, the highest groundwater level were at 9.29 - 13.97 masl in October - Febuari (during rainy season) and the deepest groundwater level were at 14.60 - 20.41 masl) in March - September (during dry season). Based on the analysis of the timescale and the groundwater level fluctuations that influenced by rainfall, and the aquitard layer in the geology section, and groundwater level exist above the aquifer, so that the aquifer system in this regions is classified as semi depressed aquifer. In this aquifer system, the underlying material is fine grained (aquitard) that allows groundwater moving inside the layer.Keywords: groundwater, AWLR, rainfall, fluctuation, Jakarta

scholarly journals Aquifer System, Recharge-Discharge Zone and Groundwater Basin Boundary Mapping to Support Open and Transparent Water Data, Case Study: Karangkobar Groundwater Basin

2019 ◽  
Vol 125 ◽  
pp. 01012
Author(s):  
Thomas Triadi Putranto ◽  
Muhammad Iman Luthfi ◽  
Nurakhmi Qadaryati ◽  
Narulita Santi ◽  
Wahju Krisna Hidajat
Keyword(s):  
Groundwater Management ◽  
Discharge Zone ◽  
Aquifer System ◽  
The Public ◽  
Data Application ◽  
Comprehensive Information ◽  
Groundwater Basin ◽  
The Government ◽  
Transparent Water

Sustainable groundwater management based on groundwater basin (GWB) must be equipped with comprehensive information including the characteristic of hydrogeology. This management method is very useful for governments to design some regulations, such as tax and conservation zone. Nowadays, not only the government but the public society can also have access to know this management. Open and transparent groundwater application needs sufficient data. Based on that issue, this research aims to provide the geological and hydrogeological conditions of GWB, define the aquifer configurations, and determine the groundwater recharge-discharge zones and the type of GWB boundary on Karangkobar GWB. The methods applied to the study are 1) mapping the geological and hydrogeological condition; 2) reconstruction of subsurface stratigraphic condition; and 3) overlay four parameters of the recharge-discharge zone. The Karangkobar GWB consists of the unconfined and confined aquifer of High Plain Aquifer, where the groundwater flows from north and east heading southward and westward. Seven boundary types bounded the Karangkobar GWB. The map can also support the open and transparent water data application system, it will also ease the party that will conduct an assessment to design regulation regarding the groundwater management.

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

2021 ◽  
Vol 930 (1) ◽  
pp. 012055
Author(s):  
D L Setyaningsih ◽  
K Setyawan ◽  
D P E Putra ◽  
Salahuddin
Keyword(s):  
Hydraulic Conductivity ◽  
Groundwater Flow ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Research Area ◽  
Silty Clay ◽  
Groundwater Abstraction ◽  
Aquifer Systems ◽  
Groundwater Basin ◽  
Basin Area

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.

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

2017 ◽  
Vol 19 (3) ◽  
pp. 175 ◽  
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. 

scholarly journals Improving the Resolution and Accuracy of Groundwater Level Anomalies Using the Machine Learning-Based Fusion Model in the North China Plain

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 46
Author(s):  
Gangqiang Zhang ◽  
Wei Zheng ◽  
Wenjie Yin ◽  
Weiwei Lei
Keyword(s):  
Machine Learning ◽  
Data Fusion ◽  
Groundwater Level ◽  
North China Plain ◽  
North China ◽  
Gradient Boosting ◽  
Fusion Model ◽  
The North ◽  
The North China Plain ◽  
Prediction Module

The launch of GRACE satellites has provided a new avenue for studying the terrestrial water storage anomalies (TWSA) with unprecedented accuracy. However, the coarse spatial resolution greatly limits its application in hydrology researches on local scales. To overcome this limitation, this study develops a machine learning-based fusion model to obtain high-resolution (0.25°) groundwater level anomalies (GWLA) by integrating GRACE observations in the North China Plain. Specifically, the fusion model consists of three modules, namely the downscaling module, the data fusion module, and the prediction module, respectively. In terms of the downscaling module, the GRACE-Noah model outperforms traditional data-driven models (multiple linear regression and gradient boosting decision tree (GBDT)) with the correlation coefficient (CC) values from 0.24 to 0.78. With respect to the data fusion module, the groundwater level from 12 monitoring wells is incorporated with climate variables (precipitation, runoff, and evapotranspiration) using the GBDT algorithm, achieving satisfactory performance (mean values: CC: 0.97, RMSE: 1.10 m, and MAE: 0.87 m). By merging the downscaled TWSA and fused groundwater level based on the GBDT algorithm, the prediction module can predict the water level in specified pixels. The predicted groundwater level is validated against 6 in-situ groundwater level data sets in the study area. Compare to the downscaling module, there is a significant improvement in terms of CC metrics, on average, from 0.43 to 0.71. This study provides a feasible and accurate fusion model for downscaling GRACE observations and predicting groundwater level with improved accuracy.

scholarly journals Seismically induced changes in groundwater levels and temperatures following the ML5.8 (ML5.1) Gyeongju earthquake in South Korea

2021 ◽  
Author(s):  
Soo-Hyoung Lee ◽  
Jae Min Lee ◽  
Sang-Ho Moon ◽  
Kyoochul Ha ◽  
Yongcheol Kim ◽  
...  
Keyword(s):  
South Korea ◽  
Groundwater Level ◽  
Seismic Waves ◽  
Groundwater Resources ◽  
Fluid Pressure ◽  
Water Levels ◽  
Aquifer System ◽  
Groundwater Levels ◽  
Monitoring Wells ◽  
Gyeongju Earthquake

AbstractHydrogeological responses to earthquakes such as changes in groundwater level, temperature, and chemistry, have been observed for several decades. This study examines behavior associated with ML 5.8 and ML 5.1 earthquakes that occurred on 12 September 2016 near Gyeongju, a city located on the southeast coast of the Korean peninsula. The ML 5.8 event stands as the largest recorded earthquake in South Korea since the advent of modern recording systems. There was considerable damage associated with the earthquakes and many aftershocks. Records from monitoring wells located about 135 km west of the epicenter displayed various patterns of change in both water level and temperature. There were transient-type, step-like-type (up and down), and persistent-type (rise and fall) changes in water levels. The water temperature changes were of transient, shift-change, and tendency-change types. Transient changes in the groundwater level and temperature were particularly well developed in monitoring wells installed along a major boundary fault that bisected the study area. These changes were interpreted as representing an aquifer system deformed by seismic waves. The various patterns in groundwater level and temperature, therefore, suggested that seismic waves impacted the fractured units through the reactivation of fractures, joints, and microcracks, which resulted from a pulse in fluid pressure. This study points to the value of long-term monitoring efforts, which in this case were able to provide detailed information needed to manage the groundwater resources in areas potentially affected by further earthquakes.

scholarly journals The Flow through the Gulf of Mexico

2019 ◽  
Vol 49 (6) ◽  
pp. 1381-1401 ◽  
Author(s):  
J. Candela ◽  
J. Ochoa ◽  
J. Sheinbaum ◽  
M. López ◽  
P. Pérez-Brunius ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Straits Of Florida ◽  
The North ◽  
Astronomical Tide ◽  
Flow Through ◽  
Sverdrup Transport ◽  
The Mean ◽  
Yucatan Channel ◽  
Range Variation

AbstractFour years (September 2012 to August 2016) of simultaneous current observations across the Yucatan Channel (~21.5°N) and the Straits of Florida (~81°W) have permitted us to investigate the characteristics of the flow through the Gulf of Mexico. The average transport in both channels is 27.6 Sv (1 Sv = 106 m3 s−1), in accordance with previous estimates. At the Straits of Florida section, the transport related to the astronomical tide explains 55% of the observed variance with a mixed semidiurnal/diurnal character, while in the Yucatan Channel tides contribute 82% of the total variance and present a dominant diurnal character. At periods longer than a week the transports in the Yucatan and Florida sections have a correlation of 0.83 without any appreciable lag. The yearly running means of the transport time series in both channels are well correlated (0.98) and present a 3-Sv range variation in the 4 years analyzed. This long-term variability is well related to the convergence of the Sverdrup transport in the North Atlantic between 14.25° and 18.75°N. Using 2 years (July 2014–July 2016) of simultaneous currents observations in the Florida section, the Florida Cable section (~26.7°N), and a section across the Old Bahama Channel (~78.4°W), a mean northward transport of 28.4, 31.1, and 1.6 Sv, respectively, is obtained, implying that only 1.1 Sv is contributed by the Northwest Providence Channel to the mean transport observed at the Cable section during this 2-yr period.

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