scholarly journals Identification of Aquifer Layer Based on 2D Resistivity Data in Lhokseumawe Aceh-Indonesia

2019 ◽  
Vol 8 (3) ◽  
pp. 78-83
Author(s):  
Zul Fadhli ◽  
Muhammad Syukri ◽  
Marwan Marwan
Keyword(s):  
Ground Water ◽  
Sea Water ◽  
Confined Aquifer ◽  
Clayey Sand ◽  
Sea Water Intrusion ◽  
Aceh Province ◽  
On Line ◽  
Aquifer Type ◽  
2D Resistivity ◽  
Schlumberger Array

Penelitian untuk mengidentifikasi keberadaan air tanah dan kedalaman akuifer telah dilakukan di wilayah KEK Arun Lhokseumawe Provinsi Aceh dengan kondisi geologi daerah penelitian adalah batuan lanauan dan batuan lempung serta geomorfologinya berupa perkebunan dan sungai buatan. Penelitian ini mengaplikasikan metode geolistrik resistivitas 2D dengan konfigurasi Wenner-Schlumberger. Akuisisi data di lapangan menggunakan alat SuperSting R8 yang keseluruhannya mempunyai 4 lintasan pengukuran dengan lintasan 1 dan 2 memotong lintasan 3 dan 4, panjang masing-masing lintasan pengukuran tersebut adalah 400 m. Pemprosesan data Hasil akuisisi di lapangan menggunakan software Res2dinv untuk menampilkan model 2D bawah permukaan di lokasi penelitian. Hasil interpretasi menunjukkan lintasan L1 pada kedalaman sampai dengan 70 m terdapat lempung berpasir, lanauan dan gravel. Terdapatnya pengaruh instrusi air laut pada kedalaman 25 m yang ditandai dengan nilai resistivitas 1 Ώm. Lapisan akuifer di identifikasi pada jarak bentangan 100 - 200 m dan pada kedalaman 60 m dengan nilai resistivitas 30 Ωm. Penampang lintasan 3 dan 4 tidak menunjukkan adanya lapisan akuifer yang layak untuk diexploitasi pada lintasan tersebut. Interpretasi lintasan L4 menunjukkan adanya intrusi air laut yang besar pada lapisan pertama. Terdapat 3 lapisan yang kontras yaitu lapisan lempung berpasir, gravel/lempung lanauan dan batuan dasar. Lapisan akuifer pada lintasan 4 diinterpretasikan berada pada kedalaman 70 m dengan nilai resistivitas 30 Ωm. Rekomendasi yang paling layak untuk lokasi pengeboran yaitu pada lintasan 4 pada jarak bentangan 180 m dengan jenis akuifer tertekan. The research to identified ground water and depth of aquifer was conducted in KEK Arun Lhokseumawe Aceh Province. The geology contained siltstone and clay with geomorphology area are plantation and artificial river. The 2D resistivity acquisition was using Supersting R8 equipment with Wenner-Schlumberger array. There are 4 survey lines that conducted in the area where line 1 and 2 were crossed with line 3 and 4. The length of each line is 400 m respectively. The data processing was using Res2dinv software to shows 2D subsurface model. The result shown that line 1 is sandy clay, siltstone and gravel at depths up to 70 m. It was influenced by sea water at depth 25 m with resistivity value of 1 Ωm. The aquifer layer was identified at depth 60 m with resistivity value of 30 Ωm. However, line 3 and 4 were presented that the area surveys are suitable for exploration which have not indicate the existence of an aquifer layer. In the last line, it shown sea water intrusion at the first layer. There are 3 layers that contained in line 4 which is clayey sand, gravel and bedrock. The aquifer layer at Line 4 was interpreted at depth 70 m with resistivity value of 30 Ωm. The most feasible recommendation for a drilling location is on Line L4 at a distance of 180 m with a confined aquifer type. Keywords: Aquifer, Resistivity, Lhokseumawe, ground water, sand

scholarly journals Kajian Potensi Air Tanah Berdasarkan Data Geolistrik Resistiviti Untuk Antisipasi Kekeringan Di Wilayah Pesisir Kangkung, Kabupaten Kendal, Privinsi Jawa Tengah

2017 ◽  
Vol 20 (1) ◽  
pp. 35 ◽  
Author(s):  
Sugeng Widada ◽  
Alfi Satriadi ◽  
Baskoro Rochaddi
Keyword(s):  
Groundwater Quality ◽  
Ground Water ◽  
Coastal Area ◽  
Sea Water ◽  
Coastal Region ◽  
Pumping Test ◽  
Dry Season ◽  
Sea Water Intrusion ◽  
Groundwater Exploitation ◽  
Water Intrusion

Coastal Region of Kangkung, Kendal Regency, Central Java Province is one of the areas that experiencing water in the dry season. Groundwater exploitation is one way solution to meet the water needs for people in the area, especially in the dry season. Therefore it is necessary to study potency of ground water in coastal area of Kangkung. The research was  conducted to determine the potential of ground water in the confined aquifer in the Coastal Region of Kangkung, Kendal District which is expected to be utilized as a source of water to meet the needs of local communities. The method used in this research is  descriptive analysis to describe the condition of aquifer, however some things are delivered quantitatively. The aquifer condition was obtained from the interpretation of geoelectricity (resistivity) data supported by geological and hydrogeological observation data and pumping test data as secondary data. Groundwater quality analysis and simple hydrochemical analysis is with Chlorida - Bicarbonat Ratio (CBR) method to know the possibility of sea water intrusion. The results showed that the aquifer in the coastal area of Kangkung has the potential of 29.13 lt / sec ground water discharge which can be utilized to meet the needs of clean water 18,800 people. Although it is adjacent to the sea, the groundwater in the study area does not undergo sea water intrusion. Groundwater quality in this location is qualified as raw drinking water according to SK Menkes No, 492/Menkes/Per/IV2010 tentang Persyaratan Kualitas Air Minum. Keywords: ground water, geoelectric, intrusion  Wilayah Pesisir Kangkung, Kabupaten Kendal Provinsi Jawa Tengah merupakan salah satu daerah yang pada musim kemarau mengalami kekeringan. Pemanfaatan air tanah merupakan salah satu cara untuk memenuhi kebutuhan air bagi masyarakat di daerah tersebut, terutama pada musim kemarau. Oleh karena itu perlu dilakukan kajian potensi air tanah di daerah Pesisir Kangkung tersebut. Penelitian ini bertujuan untuk mengetahui potensi air tanah pada akuifer dalam (tertekan) di Wilayah Pesisir Kangkung, Kabupaten Kendal yang diharapkan dapat dimanfaatkan sebagai sumber air bersih untuk memenuhi kebutuhan masyarakat setempat. Metode penelitian yang digunakan dalam penelitian ini adalah diskriptis analisis untuk menggambarkan kondisi akuifer, namun demikian beberapa hal disampaikan secara kuantitatif. Kondisi akuifer diperoleh dari hasil interpretasi data geolistrik resistiviti dengan didukung data hasil pengamatan geologi dan hidrogeologi serta data sekunder berupa hasil pumping test. Analisa kualitas air tanah dan analisis hidrokimia secara sederhana dengan metode Chlorida – Bicarbonat Ratio (CBR) dilakukan untuk mengetahui kemungkinan terjadinya intrui air laut. Hasil penelitian menujukan bahwa akuifer di daerah Pesisir Kangkung mempunyai potensi debit air tanah 29,13 lt/det yang dapat dimanfaatkan untuk memenuhi kebutuhan air bersih 18.800 orang. Meskipun berbatasan dengan laut, namun air tanah di daerah kajian tidak mengalami  terintrusi air laut. Kualitas air tanah di lokasi ini memenuhi syarat sebagai bahan baku air minum sesuai SK Menkes No, 492/Menkes/Per/IV2010 tentang Persyaratan Kualitas Air Minum. Kata Kunci : air tanah, geolistrik, intrusi

scholarly journals IMPACT OF SALINITY ON IRRIGATED MACADAMIA PRODUCTION

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1172d-1172 ◽  
Author(s):  
H.C. Bittenbender ◽  
N.V. Hue
Keyword(s):  
Ground Water ◽  
Sea Water ◽  
Nutrient Composition ◽  
Sea Water Intrusion ◽  
Trunk Diameter ◽  
Class A ◽  
Macadamia Integrifolia ◽  
Water Conditions ◽  
Effect On Yield ◽  
Class A Pan

Many areas in Hawaii with potential for growing macadamia lack sufficient rainfall. Ground water in these areas is generally brackish due to sea water intrusion. An experiment was started in 1984 to determine the response of young macadamia trees cv. `Kau' (HAES 344) Macadamia integrifolia to salinity under field irrigated conditions. Treatments were rain only, freshwater, 500 and 1200 ppm salt as diluted sea water to simulate the ground water conditions.Until mid 1989 trees were irrigated twice weekly to supply 100% ET (evapotranspiration) of the previous week based on a class A pan. No differences were detected among treatments on yield, trunk diameter, soil and tissue nutrient composition except trees in the rain only treatment less yield and trunk growth. Irrigation treatments were modified in mid 1989 to rain only, and twice weekly fresh water, 1200 and 2400 ppm salt at 50 and 75%. ET. Effect on yield, trunk diameter, soil and tissue nutrient composition in the 1989-90 season will be reported.

scholarly journals Assessment of Hydrochemistry and Unconfined Groundwater Quality At East Simeulue Coastal Area, Aceh Province

2019 ◽  
Vol 10 (1) ◽  
pp. 39
Author(s):  
WISNU ARYA GEMILANG
Keyword(s):  
Groundwater Quality ◽  
Ground Water ◽  
Coastal Area ◽  
Quality Index ◽  
Sea Water ◽  
Public Infrastructure ◽  
Groundwater Quality Index ◽  
Aceh Province ◽  
Tourism Potential

East Simulue Subdistrict is one of the areas that has coastal tourism potential that is very good to develop. Tourism development cannot be separated from the provide of tourism facilities and infrastructure, one of which is public infrastructure in the form of providing clean water. Determination of hydrogeochemical characteristics and determination of groundwater quality index (Water Quality Index) is one method of assessing groundwater worthiness in East Simulue. Ground water in the Simulue East coastal area is dominated by HCO3 elements, with a value of Cl / HCO3 ratio <0.5 which indicates that ground water is not affected by sea water, while the Na / Cl ratio> 1 indicates that groundwater has a process of groundwater hydrolysis. There are 6 types of facies hydrochemical facies of East Simulue groundwater, Mg-HCO3, Ca-HCO3, mixing Ca-Na-HCO3, Na-HCO3, Na-SO4 and Ca-SO4, but overall dominated by Mg-HCO3 facies. The ratio of Na ++ K +/ (Na ++ K ++ Ca2 +) as a function of TDS also shows that the chemistry of East Simeulue groundwater is dominated by the interaction of rock (formation) with groundwater. Groundwater quality index classification in Simuelue coastal shows that overall groundwater is in the category of excellent water (good) and good water (good) category.

scholarly journals KAJIAN DAERAH TERINTRUSI AIR LAUT DI WILAYAH PESISIR KECAMATAN KUTA UTARA, KABUPATEN BADUNG

2015 ◽  
Vol 9 (2) ◽  
pp. 72
Author(s):  
I Made Sukearsana ◽  
I Gusti Bagus Sila Dharma ◽  
I Wayan Nuarsa
Keyword(s):  
Electrical Conductivity ◽  
Ground Water ◽  
Sea Water ◽  
Coastal Areas ◽  
Sea Water Intrusion ◽  
Permeability Characteristics ◽  
Distribution Maps ◽  
Water Intrusion ◽  
Total Dissolved Solid

The total population of District Kuta Utara 2014 recorded 68.422 people with an average population density of 2,021 people/km2 while the number of tourism accommodation facilities (hotels, villas, restaurants) recorded 399 pieces. The rapid of population growth and the development of tourism accommodation facilities require ground water more increasing. Intake of large amounts of ground water potential to cause pollution/ sea water intrusion. This study aims to determine the quality of the groundwater, knowing distribution maps sea water intrusion and to predict the level of sea water intrusion coming years. This research method uses descriptive quantitative method. Furthermore, to determine the quantity and quality of ground water was measured groundwater levels and analysis of the parameters of temperature, total dissolved solid, pH, chloride, hardness and electrical conductivity of the 60 sample wells. Results of analysis of each of the key parameters that can be mapped and known overlay distribution maps sea water intruded area. The observation of the quantity and quality of groundwater in coastal areas of Kuta Utara subdistrict shows the range of the depth of the ground water level between -5.15 meters to -22.16 meters. Results of the analysis of ground water quality of the 60 groundwater samples showed that there has been a decline in the quality of ground water is as much as 14 samples total dissolved solid (TDS) the highest reaches 1,122 mg/ l, the highest electrical conductivity reached 1,677 ìMhos / cm and the highest chloride reached 532, 5 mg/l. Distribution maps sea water intruded area shows that in coastal areas troubled district of Kuta Utara indicated seawater intrusion, especially in the area of Petitenget and Batubelig, Kerobokan Kelod Village area of 78.44 Ha. Prediction of sea water intrusion in 2022 was highest in the area of tourism accommodation caused by ground water extraction enough much, kind of gray-brown soil regosol has a rough texture and high permeability characteristics so it is easy to pass groundwater.

Sign in / Sign up

Export Citation Format

Share Document