scholarly journals Application of vlf method to identify flow patterns of underground river in the karst area Ngargoharjo, Wonogiri

2019 ◽  
Vol 1170 ◽  
pp. 012071
Author(s):  
E D Nugraha ◽  
H Susanto ◽  
Khumaedi
Keyword(s):  
Flow Patterns ◽  
Karst Area ◽  
Underground River

scholarly journals Analysis of Cavities Characteristics in the Semar - Kiskendo Caves System, Jonggrangan Karst Area, Kulon Progo, Indonesia

2019 ◽  
Vol 125 ◽  
pp. 01016
Author(s):  
Romza Fauzan Agniy ◽  
Risma Sari Septianingrum ◽  
Ariel Seto Adinugraha ◽  
Qodri Alghozali ◽  
Bagas Aditya ◽  
...  
Keyword(s):  
Water Source ◽  
Average Diameter ◽  
Tracer Test ◽  
Karst Area ◽  
Survey Method ◽  
Cave System ◽  
Underground River

The Kiskendo Cave System is a system that has many benefits, including as a tourist site and water source. One of the systems in the upstream of Kiskendo Cave is the Semar-Kiskendo Caves system. This system is estimated to greatly affect the condition of the Kiskendo cave system because it is connected to the allogenic river which contributes to recharge from outside Jonggrangan Karst Area. The purpose of this research was 1) to find out the characteristics of the Semar Cave cavities and 2) to analyze the connectivity and characteristics of cavities in the Semar - Kiskendo Caves system. This research employed a survey method by mapping the cave to answer the first problem and conducting a tracer test of underground river stream to answer the second problem. The results showed that the Semar Cave cavity that could be mapped was 158.2 meters long, the total volume of the cave was 1,220.6 m3, and the average diameter of the cave cavity was 2.8 meters. The results of second study using the tracer test showed the connection between Semar Cave and the underground river in Kiskendo Cave, and the cavities had a characteristic of a single conduit which was sufficiently developed.

scholarly journals The Effectiveness of Wenner-Schlumberger and Dipole-dipole Array of 2D Geoelectrical Survey to Detect The Occurring of Groundwater in the Gunung Kidul Karst Aquifer System, Yogyakarta, Indonesia

2016 ◽  
Vol 1 (2) ◽  
pp. 71 ◽  
Author(s):  
Oktanius Richard Hermawan ◽  
Doni Prakasa Eka Putra
Keyword(s):  
Karst Aquifer ◽  
Groundwater Exploration ◽  
Karst Area ◽  
Karst Terrain ◽  
Aquifer System ◽  
Crystalline Limestone ◽  
Karst Aquifer System ◽  
Dipole Configuration ◽  
Underground River ◽  
Water Saturated

Until today, geoelectrical survey is the most effective method for groundwater exploration. 2D method or known as horizontal profiling is now the most appropriate method in the geoelectrical survey compare to vertical electrical sounding method. The 2D method of Wenner-Schlumberger and Dipole-dipole configuration proved to be very effective to locate conventional aquifer occurrence on volcanic terrain or sedimentary terrain. Karst aquifer system is an unconventional aquifer and acts very differ in contrast with the conventional sedimentary aquifer. Heterogeneity and discontinuity of limestones in karst terrain will reveal a wide variety of resistivities, hence it is difficult to interpret. This research has important objective to define the effectiveness of the Wenner-Schlumberger and Dipole-dipole configuration in the 2D geoelectrical survey to explore groundwater in the karst area. Field observation of geology and 2D geoelectrical survey were conducted in underground river of Kali Suci Area, Gunung Kidul. In Kali Suci where an endokarst cave was occured on the surface, line survey was placed in the top of the cave and across the geometry of the cave. Measured stratigraphy in the wall of the cave found four types of limestone which consist of packstone, wackestone, grainstone and crystalline limestone. The Wenner-Schlumberger and Dipole-dipole method can detect differentiation of limestone types and also the exposed underground river successfully. However, compared to Wenner-Schlumberger array, Dipole-dipole array reveals less vertical accuration.. Therefore, on this research, the best method to detect water saturated zone or gourndwater in the karst system is the Wenner-Schlumberger method.

scholarly journals Hydrogeological Characterization of the Gunungsewu Karst Area in the Upper Reach of Gremeng Karst Drainage Basin, Indonesia

2021 ◽  
Vol 325 ◽  
pp. 08006
Author(s):  
Ahmad Cahyadi ◽  
Tjahyo Nugroho Adjis ◽  
Eko Haryono ◽  
Margaretha Widyastuti
Keyword(s):  
Water Resource Management ◽  
Drainage Basin ◽  
Volcanic Rocks ◽  
Tracer Test ◽  
Karst Area ◽  
Three Stages ◽  
Underground River ◽  
Definition Of ◽  
Geological Formations

The definition of a karst drainage basin in the aquifer of the karst area is an absolute thing to do as a water resource management unit. This research aimed to characterize the hydrogeology of the Gunungsewu Karst Area in the upper reach of the Gremeng Karst Drainage Basin. For this purpose, it was divided into three stages, namely geological survey, speleological survey, and artificial tracer test. The results indicate that the area observed lies in two or more geological formations: Semilir Formation, composed of sandstone and tuff from the ancient volcano Wonodadi eruptions, and Wonosari Formation, in which carbonate rocks consisting of massive coral limestone and bedded chalky limestone predominate. In volcanic rocks, the surface rivers have developed into allogenic streams flowing from underlying beds exposed updip. The contact between the two different formations results in the formation of ponors and springs. The artificial tracer test revealed two underground river systems with single conduits controlled by the allogenic rivers and large slope gradients in the study area.

scholarly journals Perunutan aliran sungai bawah tanah dalam rangka pengembangan sumber daya air daerah karst

2017 ◽  
Vol 12 (1) ◽  
pp. 33-46
Author(s):  
Heni Rengganis ◽  
Wawan Herawan ◽  
Wulan Seizarwati
Keyword(s):  
Value Added ◽  
River System ◽  
Karst Area ◽  
Common Salt ◽  
Tracer Technique ◽  
The South ◽  
Measurement Results ◽  
Karst Areas ◽  
South Sea ◽  
Underground River

Tracer technique is widely known as one of the methods used to find the relationship between the cave or underground river system in karst areas of South Blitar. In karst area of south blitar karst areas a number of water sources such as springs, underground river, and some streams out into the South Sea trace connections amongtracing the flow of underground river using tracer technique has been implemented with the aim to obtain data and information on flow systems around Umbul Tuk caves, so that water resources can be further developed as a value-added utilization of raw water supply in Blitar. Testing was conducted using artificial tracer material in the form of common salt NaCl and measurements were performed using a measuring instrument electrical conductivity (EC ). The measurement results indicate the existence of an underground river channel that connects Rowo with Umbul Tuk, with a flow rate of Umbul Tuk canal towards the South Sea of 360 l/s (March 2012), which has the potential to be exploited. Utilization of this flow, in addition to the needs of local people, and potentially also for fulfilling the needs of the new tourism in Pangi coast of the South Sea, which at present is still not developed.

scholarly journals Why are Allogenic Watersheds not Protected (Again)?

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Ahmad Cahyadi ◽  
Eko Haryono ◽  
Tjahyo Nugroho Adji ◽  
M. Widyastuti
Keyword(s):  
Water Resources Management ◽  
Mineral Resources ◽  
River System ◽  
Karst Area ◽  
Resources Management ◽  
Holistic Management ◽  
Management Objectives ◽  
Karst Areas ◽  
Underground River ◽  
Future Management

<p><em>Allogenic recharge generally contributes to the formation of the main underground river system in a karst area. However, allogenic recharge have a higher susceptibility to contamination than autogenic recharge. This is because recharge from allogenic rivers enters the underground river system without undergoing filtration by soil or rock cavities. This paper discusses changes to ministerial regulations related to karst management that have led to the exclusion of allogenic river areas from the management of allogenic rivers, examines the urgency of managing allogenic rivers, and recommends future management of karst areas from the perspective of water resources management. The change in the Minister of Energy and Mineral Resources (ESDM) regulation regarding karst management has led to a simplification of the scope related to the main tasks and functions of the Ministry of ESDM. This should be followed by making changes to regulations that are higher than the ministerial level regulations so that the management objectives stated in the previous regulation can be covered and there is holistic management of the karst area.</em></p>

scholarly journals Upstream Hydraulic Interconnection Study of Gunungkidul Karst Area Underground Rivers

EKSPLORIUM ◽  
2017 ◽  
Vol 38 (2) ◽  
pp. 81
Author(s):  
Paston Sidauruk ◽  
Satrio Satrio ◽  
Evarista Ristin Pujiindiyati ◽  
Barokah Aliyanta
Keyword(s):  
Stable Isotopes ◽  
River System ◽  
Data Interpretation ◽  
Karst Area ◽  
Tracer Technique ◽  
Direct Flow ◽  
The North ◽  
Tracer Techniques ◽  
Hydrochemical Data ◽  
Underground River

AbstractHydraulic interconnection of Jomblangan cave (Petung) with other caves and water discharges in Gunungkidul karst area has been investigated using tracer techniques and variationof stable isotopes and hydrochemical data interpretation from water samples near the cave. Many studies related to the interconnections of underground rivers around Gunungkidul Karst area have been conducted, most of them, however, focused on the area around Bribin and Seropan caves. This is because of the development activites of microhydro turbines to lift the water from underground river were still focused around Bribin and Seropan caves. Petung cave, located in the north of Bribin and Seropan caves, was believed to be one of the caves at the upstream river system of Bribin and Seropan, however, there is no evidence yet of the hydraulic interconnection between Petung cave with either Bribin or Seropan caves. The results of tracer technique at the current study showed that there was no hydraulic interconnection between Petung cave with either Bribin and Seropan caves.On the other hand, the study showed an indication of a direct flow from Petung cave to Sriti and Beton springs. The travel times from Petung to Sriti and Beton springs were found to be around 2 and 10 hours, respectively. This finding is also in agreement with the results of chemical and stable isotopes analysis from the research location. AbstrakPenelitian keterhubungan Gua Jomblangan (Petung) dengan gua lainnya dan keluaran air di sekitar daerah karst Gunungkidul telah dilakukan dengan menggunakan teknik perunut dan variasi kandungan isotop stabil serta hidrokimia sampel air di sekitar gua. Penelitian yang berkaitan dengan keterhubungan antara sistim aliran bawah tanah di sekitar daerah karst Gunungkidul telah banyak dilakukan, namun sebagian besar dari penelitian tersebut hanya berpusat pada gua di sekitar Bribin dan Seropan. Hal ini terjadi karena kegiatan pembangunan turbin-turbin mikrohidro untuk mengangkat air dari sungai bawah permukaan tanah masih terfokus di daerah gua Bribin dan Seropan. Gua Petung, yang berada di sebelah utara gua Bribin dan Seropan, dipercaya merupakan salah satu gua yang berada di hulu sistim sungai bawah tanah Bribin dan Seropan, namun, sampai sekarang belum ada bukti keterhubungan hidrolika antara gua Petung dengan gua Bribin maupun dengan gua Seropan.Hasil uji perunut dalam penelitian ini menunjukkan bahwa aliran air bawah tanah di gua Petung tidak berhubungan langsung dengan aliran bawah tanah di gua Bribin maupun di gua Seropan. Sebaliknya, hasil penelitian ini menunjukkan adanya aliran langsung dari gua Petung ke mata air Sriti dan Beton. Waktu tempuh yang dibutuhkan dari gua Petung ke mata air Sriti adalah sekitar 2 jam dan ke mata air Beton adalah sekitar 10 jam. Temuan ini sangat bersesuaian dengan hasil analisis kimia air dan isotop stabil dari lokasi penelitian.

scholarly journals The contribution of CO2 content in rainfall to dissolution process in karst area

2017 ◽  
Author(s):  
Tjahyo Nugroho Adji ◽  
Novi Rahmawati
Keyword(s):  
Water Quality ◽  
River Water ◽  
Rainy Season ◽  
Karst Area ◽  
Dissolution Process ◽  
Dominant Process ◽  
Underground River ◽  
One Year ◽  
Quality Measurements

As one of greenhouse gases, CO2 content in rainfall is has correlation with CO2 contentin atmosphere. The higher content of CO2 in rainfall will accelerate dissolution processin karst landscape. The aims of this research are to define water quality of rainfall, to determinewater quality of underground river in Bribin, and to analyze the trend of CO2content in rainfall and CO2 content in underground river. Water quality measurements ofrainfall and underground river in karst area was performed during one year in dry seasonand rainy season to compare the rainfall contribution in CO2 content in undergroundriver of Bribin.Based on the result of this research shows that rainfall accelerate CO2 content in undergroundriver that resultintensive dissolution in karst area of Bribin.Water-rock-gas interactionis used to define CO2 contribution from rainfall. Dissolution process is much intensivein rainy season that shows dominant water-rock-gas interaction due to dilution byMiscellaneous topics 193precipitation. In the end of rainy season, the influence of rainfallas the contribution ofCO2 content in river is much less. In dry season, the dominant process in river iswaterrockinteraction due to lack of CO2 from rainfall so that dissolution process will be decreased.

scholarly journals DIFFUSE FLOW SEPARATION WITHIN KARST UNDERGROUND RIVER AT NGRENENG CAVE

2017 ◽  
Author(s):  
Tjahyo Nugroho Adji ◽  
Heru Hendrayana ◽  
Sudarmadji ◽  
Suratman Woro
Keyword(s):  
Water Level ◽  
Flow Separation ◽  
Karst Aquifer ◽  
Digital Filtering ◽  
Base Flow ◽  
Karst Area ◽  
Flood Events ◽  
Wet Season ◽  
Diffuse Flow ◽  
Underground River

Diffuse flow is a dependable flow to recharge karst underground river within the dry season. Thisresearch is conducted at Ngreneng Cave, which is famous as the leakage tributary of Bribin River, themost important underground river in Gunungsewu karst area, Central Java. The objective of this researchis to separate the karst flow components at Ngreneng Cave, in order to acknowledge the percentage ofdiffuse flow during the period of measurement. A water level data logger is installed during one yearperiod to understand the variation of water level within dry and wet season. Furthermore, to define StageDischarge Rating Curve, several discharge measurement is conducted within minimum, average andmaximum discharge condition. Afterwards, the diffuse flow separation from its total flow is conducted byusing automated base flow separation by digital filtering. The digital filtering values is acquired from theanalysis of recession constant value in the occurrence of flood events in a year observation and related tothe value of the base flow maximum indices (BFI) of karst aquifer. The result shows that during one yearobservation, Ngreneng Cave experiences 68 times of flooding, with digital filtering value of 0.992. Ingeneral, the monthly estimation of the diffuse flow percentage is very close to 80%, whereas it decreasesto 41-59% during flood events.

scholarly journals THE DISTRIBUTION OF FLOOD HYDROGRAPH RECESSION CONSTANT FOR CHARACTERIZATION OF KARST SPRING AND UNDERGROUND RIVER FLOW COMPONENTS RELEASING WITHIN GUNUNG SEWU KARST REGION

2017 ◽  
Author(s):  
Tjahyo Nugroho Adji ◽  
M Misqi
Keyword(s):  
River Flow ◽  
Karst Aquifer ◽  
Maximum Flow ◽  
Karst Area ◽  
Karst Region ◽  
Karst Spring ◽  
Flood Hydrograph ◽  
Flow Components ◽  
Underground River ◽  
Recession Constant

TThis research is carried out within two caves with underground river and one karst spring, which is locatedin Gunung Sewu karst area, Gunung Kidul. The objective of this research is to recognize some flood hydrograph properties of karst aquifer characterization in order to compare the comportment of aquifer to release its flow components between underground river and karst spring. Water level data loggers are installed within two caves and one karst spring represent upper, middle, and lower elevation of karst topography, which are Beton, Seropan, and Toto Cave, respectively. In addition, time series discharge measurement in correspond to minimum, average, and maximum flow events is conducted to formulate the Annual Stage Discharge Rating Curve. Thereby, the full year river hydrograph may be defined.Afterwards, by selecting several flood hydrograph events, the recession constant in each cave includingdiffuse flow (Kb), fissure flow (Ki), and conduit flow (Kc) recession constant, is then calculated andcompared in every location. The result shows that Beton Spring that represents the upper part of researcharea confirms the quickest respond towards rainfall events. Also, this point specifies the medium numberof diffuse recession constant (Kb=0.983), compared to Seropan (0.996), and Toto (0.937), means that theaquifer surrounding Toto Cave release its groundwater storage faster than Beton Spring and SeropanCave. On the contrary, Seropan Cave performs the highest value of diffuse recession constant (0.996) andthis situation is confirmed by its dry season discharge that still above 810 lt/second

Sign in / Sign up

Export Citation Format

Share Document