Sea Water Intrusion in Kaligawe Semarang Based on Resistivity Data

2nd International Conference on Tropical and Coastal Region Eco Development 2016

地球科学;生态环境科学

Setyawan, Agus^1 ; Najib^2 ; Aribowo, Yoga^2 ; Trihadini, Agnis^3 ; Hastuti, Dhana^4 ; Ramdhani, Fitra^4 ; Waskito, Fajar^4 ; Febrika, Ganap^4 ; Virgiawan, Galang^2

Department of Physics, Faculty of Science and Mathematics, Diponegoro University, Tembalang, Semarang

50275, Indonesia^1

Department of Geology, Faculty of Engineering, Diponegoro University, Tembalang, Semarang

50275, Indonesia^2

Graduate Stud. Institute of Seismology and Volcanology, Faculty of Sciences, Kyushu University, 2-5643-29, Shin'yama, Shimabara, Nagasaki

855-0843, Japan^3

Undergraduate Stud. in Department of Physics, Faculty of Science and Mathematics, Diponegoro University, Tembalang, Semarang

50275, Indonesia^4

关键词: Apparent resistivity;    Dipole-dipole;    Geological information;    Potential difference;    Resistivity data;    Study areas;    Surface ground;    Water consumption;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/55/1/012053/pdf
DOI  :  10.1088/1755-1315/55/1/012053

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Semarang is a city on the north coast of the island of Java, Indonesia and it is lowland areas have experienced sea water intrusion. One of interesting area is Kaligawe which located at Eastern part of Semarang. Kaligawe has big population and industrial and it need water consumption. Excessive extraction of groundwater will be resulting height difference surface ground water to the surface of the sea water due to sea water intrusion. Electric resistivity method was used to detect for salt water intrusion. Dipole-dipole configuration was applied with 3 lines to get current, potential difference, and apparent resistivity from the field. 2D model has presented using Res2Dinv to get the true resistivity and the depth of each layer. A calibration of the model was conducted based on geological information. Result showed the subsurface area has 4 layers: sandstone, sandsilt, siltstone and clay. Moreover the sea water intrusion occurs in the Northwest, East and Southern part of the study area.