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 Intrusi Air Laut di Pesisir Tugu Kota Semarang Berdasarkan Resistiviti dan Hidrokimia

2018 ◽  
Vol 21 (2) ◽  
pp. 75
Author(s):  
Sugeng Widada ◽  
Baskoro Rochaddi ◽  
Chrisna Adhi Suryono ◽  
Irwani Irwani
Keyword(s):  
Coastal Area ◽  
Land Surface ◽  
Sea Water ◽  
Descriptive Analysis ◽  
Unconfined Aquifer ◽  
Sea Water Intrusion ◽  
Diagram Method ◽  
Groundwater Exploitation ◽  
Water Intrusion ◽  
The North

Sea Water Intrusion in Tugu Coastal Area of Semarang City Based on Resistivity and Hydrochemical Tugu Coastal Area is one of the coastal areas in Semarang City, Central Java Province that continues to grow. Although the clean water network from the  Local Water Supply Utility is available, groundwater is still used to meet the water needs of the community.  Some of the groundwater in the area is brackish to salty conditions as the result of sea water intrusion process. The research aims to determine configuration of aquifers which have been intruded with sea water in Tugu Coastal Area, Semarang City, so that groundwater exploitation from the aquifer can be avoided. The method used in this study was descriptive analysis, in which the condition of aquifers was based on interpretation of resistivity data. Simple hydrochemical facies analysis using the Trilinier Piper Diagram method is carried out to detect sea water intrusion. The results of the study indicated that aquifers in the Coastal area consisted of several layers. Aquifer which has been intruded with seawater is located on the north side of the Semarang - Kendal highway, both for confined and unconfined aquifers. The depth of confined aquifer which is intruded by sea water reaches 50 - 75 m below the local land surface. While the unconfined aquifer depth is up to a depth of 6 m below the local land surface. Wilayah Pesisir Tugu, Kota Semarang, Provinsi Jawa Tengah merupakan salah satu daerah pesisir di Kota Semarang yang terus berkembang. Meskipun jaringan air bersih dari Perusahaan Daerah Air Minum telah tersedia, namun pemanfaatan air tanah masih digunakan untuk memenuhi kebutuhan air bagi masyarakat. Sebagian air tanah di daerah tersebut dalam kondisi payau hingga asin yang diduga akibat proses intrusi air laut.. Penelitian ini bertujuan untuk mengetahui konfigurasi akuifer yang telah terintrusi air laut Wilayah Pesisir Tugu, Kota Semarang, sehingga dapat dihindari pengambilan air tanah dari akuifer tersebut. Metode penelitian yang digunakan dalam penelitian ini adalah diskriptis analisis untuk menggambarkan kondisi akuifer berdasarkan hasil interpretasi data geolistrik resistiviti.  Analisa fasies hidrokimia secara sederhana dengan metode Diagram Triliner Piper dilakukan untuk mendeteksi adanya intrusi air laut. Hasil penelitian menujukan bahwa akuifer di daerah Pesisir Tugu terdiri dari beberapa lapisan. Akuifer yang telah terintrusi air laut adalah yang berada di sebelah utara jalan raya Semarang – Kendal, baik untuk akuier bebas maupun akuifer tertekan. Kedalaman akuifer tertekan yang terintrusi adalah hingga mencapai 50 sampai dengan 75 m di bawah muka tanah setempat. Sedangkan kedalaman akuifer bebasnya berada hingga kedalaman 6 m di bawah muka tanah setempat

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.

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