Physics

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Pembuatan Ec-Probe Untuk Mengukur Kelembaban Tanah Pertanian Mempergunakan Modifikasi Konfigurasi Wenner-Array
(2013-03-05) Sinaga, Santon; U., Lazuardi; Setiadi, Rahmondia N.
This study aims to create a soil moisture measuring device based on the Wenner method. The main circuit of the tool uses an IC a type LM 317A with output voltage 1.2 Volts to 37 Volts and can pass current of 1.5 A. The sensor used is a type of cylindrical electrodes with length of 705 mm and the detection electrode consists of a ring electrode with radius equal to 15 mm in diameter and 4 mm thick, spacerring and cone part can be opened. Testing soil moisture measuremen of Inseptisol that taken from UPT Faperta UR, Andisol from Bukittinggi and Entisol from area of watershed Kampar and measured using the calibrator Soil Tester Lutron produce five levels of soil moisture for each sample. Soil samples with moisture is tested and characterized with a modified 4- point Wenner by injecting a current of 1 mA. these modeling obtained a general mathematical equation model that describes the relationship between the electrodes voltage (UO) and soil moisture (θw) on the soil types Uo yo A Tw BTw2 CTw3 the equation is empirical and has different values for those three soil samples
Study Laju Perpindahan Panas Konveksi-Bebas Dari Berbagai Fluida Pada Silinder Berongga Berdasarkan Fungsi Jarak dan Waktu
(2013-03-05) Ningsih, Kurnia Gusti; Salomo; U., Lazuardi
Heat transfer is commonly found in industry such as the heat transfer between pipe and air in steam pipe and boilers. Heat transfer can be divided into three types that are conduction, convection, and radiation. In this paper, a measurement of heat transfer rate that occurs in water and oil in a pipe based on free convection method is described. Temperature measurement system on the fluid using a k-type thermocouple sensor as inputs is connected to an amplifier was while the output of the circuit is connected to an ADC Card Velleman for data acquisition and read by a personal computer. Thermocouple sensors have been tested and calibrated using an oven, then a linear equation was obtanied based on a function of voltage and temperature to convert the sensor output. Based on four point intervals, sensor temperature changed suit with power various. At the minimum and maximum power variation of each sensor value, the specific heat and the coefficient of thermal heat of the fluid. Were obtained with minimum power 216 watt and maximum power 322.7 watt in fluid water, specific heat value obtained are 4026.11 J/KgoC and 4398.8 J/KgoC. Then thermal coefficient are 1.67 W/m2oC and 1.21 W/m2oC. In the petroleum fluid with the minimum 216 watt and maximum 322.7 watt power, specific heat value obtained are 3230.3 J/KgoC and 3891.9 J/KgoC. Then thermal coefficient are 1.22 W/m2oC and 1.48 W/m2oC. The research shows that the longer time is required for the temperature to reach the steady state with the greater power used on it
PENGUKURAN KOEFISIEN ABSORPSI BUNYI DARI LIMBAH BATANG KELAPA SAWIT
(2013-03-05) Sinaga, Debora M; Krisman; Defrianto
The measurement of the sound absorption coefficient of oil palm stem has been conducted. A stem of oil palm which is used in this research was processed into square boards with size of 23 cm x 23 cm as a test sample. The sample then was cut into 4 pieces which has the same size but the thickness is varied, i.e 3 mm, 6 mm, 9 mm and 15 mm. Measurement of the sound absorption coefficient of the samples was done using impedance tube method made of acrylic. The generated frequencies used were 125 Hz, 250 Hz, 500 Hz, 1000 Hz and 2000 Hz. The highest sound absorption coefficient obtained from this research is 1.175 mm-1 at 2000 Hz frequency. Meanwhile, the smallest sound absorption coefficient is 0.157 mm-1 at 125 Hz frequency. The sound absorption coefficient of the samples at low frequencies (125-500 Hz) is quite small compared to high frequency. The sound absorption coefficient of samples increases as the frequency is increased. The result of research at 125-500 Hz frequencies showed that the sound absorption coefficient of samples depends on the sample thickness. The sound absorption coefficient increases as the thickness of sample is increased.
EIGEN FUNGSI DAN EIGEN ENERGI DARI ELEKTRON DALAM KAWAT KUATUM TANPA IMPURITAS
(2013-03-05) Fauzi, Rio; Erwin; Salomo
Quantum wire (nanowire) is a wire with nanometer size, where the movement of electrons inside the wire experiences hoping from one site to the next site. If the wire does not have impurities, the electron motion will be ballistic. However, as a matter of fact the creation of quantum wires can not be separated from impurities. In this paper a computer simulation program to fine the Eigen functions and Eigen energy of electrons in one-dimensional quantum wire without impurities was developed. The process of this simulation uses MATLAB version 7 program. Eigen functions and Eigen energy of electrons in a quantum wire can be computed by solving time independent Schrodinger equation. In this research, a computer program comprises of two programs, namely the program and the main program menu. A program menu is used to enter the input data that will be written in the data file. This program allows users to enter the data required in the calculation. The main program is a program used to calculate the Eigen functions and Eigen energy. Computer program to calculate Eigen function and Eigen energy of electron in quantum wire has been created and has been succeeded on the run, and the results are in accordance with the results of theoretical calculations. Eigen value for electron energy on n=1,2,3,4, and 5 obtained 0.0038eV; 0.0151eV; 0.0339eV; 0.0602eV; and 0.0941eV. so for the same n theoretical calculation results are 0.0038eV; 0.0151eV; 0.0339eV; 0.0602eV; and 0.0941eV
PENENTUAN KOEFISIEN ABSORPSI GELOMBANG BUNYI DARI KERTAS KARDUS
(2013-03-05) Siregar, Wahyuddin; Emrinaldi, Tengku; Tambunan, Walfred
A study concerning the absorption of acoustic waves using acoustic panels made from corrugated paper. In this study about absorption of acoustic waves has been carried out by measuring the sound absorption coefficient using corrugated paper as raw material for acoustic panels. The study was conducted by direct measurement in the laboratory using acoustic instruments and measurements obtained from the value level of intensity and level of initial intensity after passing through the material, then the data is equalized using a comparison between the level of intensity of the sound absorbed by the level of intensity of sound that arrives at the surface of the material using Excel and SPSS program to get the value of sound absorption coefficient on the tested material. Material thicknesses used are 0.5 cm to 2 cm, while the frequencies used are 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz. Based on these results, it can be concluded that the highest coefficient was 0.37 and the lowest result was 0.04 which each value coefficient is related to frequency of 2000 Hz with a thickness of 1 cm and a frequency of 125 Hz with a thickness of 0.5 cm
ANALISA SEBARAN AWAN UNTUK MENENTUKAN PREDIKSI CURAH HUJAN DI KOTA PEKANBARU BERDASARKAN DATA PENGINDERAAN JARAK JAUH
(2013-03-05) Hakim, Mona Gustina; Syech, Riad; Ardhitama, Aristya
A research on the analysis of cloud distribution was performed to predict the rainfall in Pekanbaru based on remote-sensing data. The data sources of the research was collected using a satellite and radar. The data was calculated using MAE, MAPE and RMSE. The research was conducted for fifteen days with three time divisions; at 00Z, 06Z and 12Z. The research using satellite shows that values of MAE, MAPE and RMSE at 00Z were resepectively 30.2, 44.74%, 116.964; at 06Z, that values were 11.486, 138.39%, 44.487; and at 12Z, the values were 30.406, 60.09%, 117.764, . With radar, the values of MAE, MAPE and RMSE at 00Z were respectively 36.166, 53.58%, 140.0728,; at 06Z were 40.28, 485.3%, 156.003; and at 12Z, the values of MAE, MAPE and RMSE were respectively 37.12, 73.21%, 143.765. The graphs of data show that satellite interpretation was better than radar interpretation. The relationship between the cloud peak temperature and the rainfall was very clearly seen. The lower the cloud peak temperature was, the lower the rainfall would be. Such a condition could not be seen at radar intepreation due to some hindering factors such as distance, celluler towers affecting the signal transmission
PEMBUATAN ALAT UKUR KUAT MEDAN MAGNET INDUKSI BERBASIS KOMPUTER
(2013-03-05) Gusrini, Elni; U., Lazuardi; Setiadi, Rahmondia N.
Magnetic field is an important physical quantity in many research fields such as research in geology, geophysics, and research in the field of magnetism. In this paper, a computer-based instrument for measuring induced magnetic field strength is decribed. The instrument system for measuring magnetic field strength is an instrument with an external measuring unit using KMZ10B magnetoresistive sensor with analog amplifiers controlled by an ADC 7822 microprocessor, and connected to host personal computer with running application software based Visual C++ for data acquisition. Based on various coil dimension and excitation currents, the system can be configured during the measurement. Induced magnetic field strength can be detected by measuring the inductance of the inductive coil in the vicinity of the position sensor. The instrument has been tested and calibrated using a standard calibrator of magnetic field instrument Teslamater FH51. A linier model based on the transfer function is used to convert and to evaluate the sensor output. Measurements with constant and variable current have been made at the center of solenoid as well as on the end of the solenoid resulting maximum field strength of BC = 1,51mT and BE = 1,23mT at the center and on the end of solenoids core respectively. The experiments show that magnetic field strength will increase with the number of coil winding and excitation current
MENENTUKAN POLA PENYEBARAN LOGAM BERAT (Cu, Fe, Zn) DI SUNGAI SIAK DENGAN MENGGUNAKAN SPEKTROFOTOMETER (AAS)
(2013-03-05) Salam, Abdul Haris; Sugianto; Emrinaldi, Tengku
A study concerning the determination of the distribution patterns of heavy metals (Cu, Fe, Zn) in Siak River has been done using a spectrophotometer (AAS). This research used an experimental method that is focused on the study of the pattern of spread of heavy metals Cu, Fe and Zn. The process was started by taking samples at 5 locations, then filtered with Whatman 40 Filter 0,45 μm and added HNO3 to dissolve the metals contained in the water sample, further analysis was undertaken using spectrophotometer (AAS) to determine the absorbance of each metals in water sample and standard solutions. Based on the data of standard solutions. Regression curves can be set up to determine the concentration of each metal. Results of water sample analysis showed that the concentration respectively of Cu, Fe and Zn was 0,0147 ppm, 0,0239 ppm and 1,9854 ppm. Based on water quality standards released by Unit Pelaksana Teknik Pengujian Dinas Pekerjaan Umum Provinsi Riau, the concentration of Cu and Zn contained in the Siak river water samples are safe for consumption for the maximum allowable limit, there are 0,02 ppm for Cu and 0,05 ppm for Zn. Another case with the Fe concentrations, that exceeds the maximum allowable concentrations for drinking in the amount of 1,9854 ppm from 0,3 ppm. After assessment, the safety distance to use the water of Siak River is more than 24,5 meters from the source of the waste
PENENTUAN TINGKAT KEBISINGAN LALU LINTAS DI JALAN TUANKU TAMBUSAI PEKANBARU
(2013-03-05) Anggraini, Bima; Dewi, Rahmi; Juandi
The measurement of the noise level at Tuanku Tambusai street Pekanbaru has been carried out. The noise observed was derived from motorcycles and vehicles. The measurement of the noise level started from 06.00 – 18.00 WIB for one week. The location of the research was denoted by 1,2 and 3 (in front Tri Bakti’s foundtion, horse statue and in front PPP office). The noise level were also studied as a function of distance from the source of noise. The intensity of noise level was measured using Sound Level Meter (SLM) SL 4112. The results of the research showed that the maximum value of noise level (on June, 26th 2012) occured 07.00 - 10.00 WIB on Sunday and the minimum value of noise level (on June, 21 th 2012) occured 14.00 – 17.00 WIB on Thursday for location 1. The measurement of the noise level as a function of distance (June 19th, July 16th, July 23th and July 30th 2012) was the value of noise level that declines with distance. The reduction of noise level caused by air absorption and surroundings. The noise level was based on different locations for the same time, the highest value of noise level occured in the location 3 than in the location 1 and 2 . The highest of noise level by caused vehicles. The result of the research showed that noise level is 85,584 dB. Based on the result of research, it is recommended that public school, hospital and house are not suitable to be built in that area since the noise level has exceeded the noise level threshold by MENKES N0.718/Men.Kes/Per/XI/198 that is 45-55 dB
PENGARUH INTI KOIL TERHADAP TEGANGAN INDUKTOR DAN RESISTOR YANG DIRANGKAI SECARA SERI
(2013-03-05) Ningsih, Surya; Erwin; Salomo
The effect of a piece of metal (called Core) such as Fe (Iron), Cu (Copper), and Al (Aluminum) on inductor’s (coils) voltage and resistance has been studied. The coils were designed by varying their turns that is 50,100, and 150 with the length and diameter of 0,05 m and 0,035 m respectively. These coils were then assembled in series with a resistor whose resistance is 150 Ω, and the voltage source as well as switch. The inductor and resistor’s voltage were measured based on applied current. This measurement was carried out for coil without core and coil with a core such as Fe, Al, and Cu. Based on the results of measurements of the inductor’s voltage of coil with Fe core was higher than without a core, however, resistor’s voltage in coil with the addition Fe was smaller than that of a coil without core. Changing the core with Cu resulted smaller inductor’s voltage compared to that of coil without core and the resistor’s voltage is reversed. Inserting of Al as a core into the coil produced higher inductor’s voltage than that of coil without core, and the resistor’s voltage is opposite. This means the coil with large magnetic field generates large inductor’s voltage while resistor’s voltage of the coil was smaller
KARAKTERISASI BAHAN FEROELEKTRIK STRONTIUM TITANAT (SrTiO3) DENGAN MENGGUNAKAN X- RAY DIFFRACTION
(2013-03-05) Susilawati; Dewi, Rahmi; Krisman
Ferroelectric material Strontium Carbonate (SrCO3) has been made with the comparison of 1:1 from chemical reaction of Titanium Dioxide (TiO2). The pellet was anneled with the temperature of 700oC and then characterized using XRD. The XRD result of SrTiO3 after anneling showed some peaks, the positions of the peaks on 2θ are 23.32°, 32.72°, 40.00o, 47.07o, 52.40°, 57.80o. After anneling, the peaks become wider, this mean the samples become crystaline in structure. From the “a” value calculation “a” mean value obtained is 3,86 Å. Once the value of a calculated and a reference value obtained percentage error can be calculated that is 1.15%
MENENTUKAN AKUIFER LAPISAN AIR TANAH DENGAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI PERUMAHAN GRIYO PUSPITO DAN BUMI TAMPAN LESTARI
(2013-03-05) Parhusip, Mando; Syech, Riad; Sugianto
A research to investigate ground water layer by Geoelistrical method in schlumberger configuration has been done at Regency of Griyo Puspito and Bumi Tampan Lestari, Tampan Districs, Pekanbaru. A resistivitimeter model – 2115A. Has been used to measure voltgsand currens of the layer. Results of measurement and calculation, it was found that there are 4 layers at from each of the research locations. The results obtained in Regency of Griyo Puspito are mentioned as follows, the resistivity and thickness of the first layer are 95.8 Ωm and 9 meters respectively, the second layer 147.8 Ωm in resisitivity and 22.9 meters thickness. This second layer is interpreted as sand clay are which contains brackish water. The resistivity and thickness of this third layer are in range of 294.1 Ωm to 298 Ωm and 36.4 to 62.4 meters. This third layer contains sandstone and aquifer. The fourth layer has resistivity less than 5000 Ωm , which is enough impermeable of water. Mean while the results of Regency of Bumi Tampan Lestari are follows, the resistivity and thickness of the first layer are range 93.0 Ωm to 97.1 Ωm and 7.6 meters to 12.2 meters respectively, the second layer are in range of 100 Ωm to 132.4 Ωm and 21.1 meters to 34.6 meters this to second layer interpreted as sandclay , which contain brackish water . The third layer has resistivity in range of 176.3 Ωm to 261.1 Ωm and thickness in range of 14.2 meters to 50 meters, which contain sandstone and aquifer. The resisitivity of the fourth layer is 4941.1 Ωm to 4974.4 Ωm, this layer interpreted as clay enough impermeable for water which has no aquifer
EFEK PENAMBAHAN CARBON NANOTUBE (CNT) TERHADAP SIFAT FISIS PELET KARBON
(2013-03-05) Fitri, Diah Angraina; Iwantono; Taer, Erman
Carbon pellets have been successfully synthesize from rubber wood sawdest (RWSD) and carbon nanotube (CNT). The results showed after the CNT added, there are increases in density (23,6 %), electrical conductivity (33,36 %) and quality of surface morphology of the sample. The SEM image of the sample showed that the CNT was distributed uniformly on the carbon pellets surface and filled in their pores
KLASIFIKASI MUTU BATU BATA BAKAR YANG DIPRODUKSI DI KOTA PEKANBARU BERDASARKAN PENGUJIAN KUAT TEKAN
(2013-03-05) Sofyanto; Juandi; Sugianto
The investigation of brick compressive strength has been done for 60 samples. Tests was carried out by the experimental method using a compressive strength testing machine (Compression Machine). The highest compressive strength for pressed brick from Tenayanraya was 0.86×107 N/m2 that fulfills grade 50 and the highest compressive strength brick for conventional brick is 1.128×10 7 N/m2 fulfill grade 100. The bricks that made in Rumbai has the highest compressive strength, that is 1.484×107 N/m2 which fulfill grade 100. The compressive strength of the conventional brick was 1.592×107 N/m2 which fulfill grade 150. Based on the results of testing, the entire samples produced from Tenayanraya and Rumbai agrees the Indonesian National Standard (SNI) SK-SNI-S-04-1989-F. The difference in compressive strength is not too large for Tenayanraya difference is 0.268×107 N/m2 and for Rumbai difference is 0.108×10 7 N/m2. The difference in brick compressive strength attributed to the differences in the processing of raw clay (clay) and the difference in location of the position of bricks during the combustion process
PENUMBUHAN DAN KARAKTERISASI NANOPARTIKEL PLATINUM DI ATAS PERMUKAAN SUBSTRAT PADAT DENGAN SEED-MEDIATED GROWTH
(2013-04-24) Afrida, Tengku; Iwantono; Umar, Akrajas Ali
Nanopartikel platinum berhasil ditumbuhkan di atas substrat padat dengan metode seed- mediated growth. Nanopartikel platinum ditumbuhkan pada temperatur 50°C dengan larutan PVP 8 ml dan katalis NaOH 0.10 ml, 0.15 ml, 0.20 ml dan 0.25 ml. Sampel dikarakterisasi dengan spektroskopi UV-Vis, XRD, FESEM dan EDX. Spektrum UV-Vis memperlihatkan bahwa nanopartikel platinum pada katalis NaOH 0.10 ml memiliki puncak intensitas serapan maksimum dibanding sampel lain. Pola XRD menginformasikan bahwa nanopartikel Platinum tumbuh pada substrat padat ditandai dengan terbentuknya puncak intensitas pada sudut 2 = 39.893° dan 46.397o dengan bidang orientasi kristal hkl (111) dan (200). Morfologi sampel dimonitor dengan FESEM yang menggambarkan bahwa nanopartikel platinum yang tumbuh memiliki densitas yang tinggi dengan ukuran partikel pada range 96.6 - 33.33 nm pada katalis NaOH 0.20 ml dan memiliki jumlah partikel sebanyak 386 butir. Hasil Tinjauan EDX memberikan informasi keberadaan puncak Platinum pada 2.1 keV dan memiliki persentase atom sebesar 1.41 % dan memiliki persentase berat yaitu 9.82 % pada sampel PVP 8 ml dan variasi volume NaOH 0.20 ml
MENENTUKAN STRUKTUR LITOLOGI BAWAH PERMUKAAN BUMI DI KELURAHAN SIMPANG BARU KECAMATAN TAMPAN PEKANBARU MENGGUNAKAN METODE GEOLISTRIK DENGAN KONFIGURASI ELEKTRODA WENNER
(2013-04-24) Suherman, Neldi; Juandi; Syech, Riad
Research has been done to determine the structure of lithology subsurface at Simpang Baru Kecamatan Tampan Pekanbaru by using geoelectric method in Wenner electrode configuration. The research measurement of current and voltage obtained by using geoelectric equipment. Then, this data was processed by excell to acquire the apparent resistivity. Res2Dinv is used to get the real resistivity and, to describe the subsurface lithology. According to the research results, the lithology of rock for both South-to-North measurement in Setia Mulia housing and West-to-East measurement in Ataiya housing were acquired in 7 lithological types , there are sandy soil, dry gravel, sand stones, sand, Alluvium, gravel and argillaceous sandstone.
PEMODELAN DENSITAS PLASMA HIDROGEN PADA KESETIMBANGAN TERMODINAMIK TEKANAN ATMOSFER
(2013-05-24) YOHANES, HENDRA; SAKTIOTO; DEFRIANTO
The equilibrium densities of hydrogen species have been determined by a computational modeling. The thermodynamic equilibrium process is required to expose plasma on a sample at a stable and controlled condition. Hydrogen species densities have been modeled based on the time-dependent continuity equation and a modified Arrhenius equation. These equations are used to integrate the density change over the time. This simulation is designed to find the equilibrium hydrogen species densities and reaction rates, both among the thermal hydrogen species and among the non-thermal hydrogen species, at a constant atmospheric pressure and low temperature. For the thermal hydrogen plasma, the equilibrium density of electron, H2, H, H2+, H+, and H- are obtained from the numerical calculation is 2.6×1010; 5.12×1024; 9.23×1022; 4.07×1021; 3.58×1022; and 5.12×1020 m-3, respectively. And, for the non-thermal hydrogen plasma, the equilibrium density of electron, H2, H, H2+, and H+ are acquired from the numerical simulation is 4.03×1023; 1.01 × 1025; 6.05 × 1024; 3.02 × 1024; and 3.36 × 1023 m-3, respectively. From the reaction rate gained, it can be inferred that the dominant process of electron in thermal hydrogen is the recombination, where its density decreases in order to reach the equilibrium. Meanwhile, the dominant process for electron in non- thermal hydrogen is the ionization, where its density increases in order to reach the equilibrium. From this modeling, the relationship between equilibrium electron densities in hydrogen plasmas and the required time to reach equilibrium was found.
MENENTUKAN LITOLOGI DAN AKUIFER MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER DAN SCHLUMBERGER DI PERUMAHAN WADYA GRAHA I PEKANBARU
(2013-06-10) Gokdi, Heri; Edisar, M.; M, Juandi
A research has been conducted to determine lithology and aquifer position in Wadya Graha I Regency Delima Village Tampan Pekanbaru. Geoelectric 2-D Wenner and 1-D Schlumberger configuration methods have been used for the research. Resistivity measurement of was conducted at the location using resistivitymeter of Naniura type NRD 22 S. Data of this research was processed using software Resistivity 2-D Inversion (Res2Dinv) for 2-D Wenner and software Vertical Electrical Sounding (VES) for 1-D Schlumberger. The results yields lithology data that consists of four layer formations. Both methods shows the same results. Therefore, both methods can be used to determine lithology and aquifer layer of a location.
ELASTISITAS LOGAM TIMBAL (Pb) PADA TANAH DI SEKITAR SUMUR WARGA DI DESA SEBANGAR KECAMATAN MANDAU KABUPATEN BENGKALIS
(2013-06-13) Fitrillisia, Githa; Emrinaldi, Tengku; Sugianto
The existence of mineral components or heavy metals affect the basic properties of soil in term of toxic compound having function of consisting density, shear strength, water content, and elasticity. Plumbum (Pb), a heavy metal is one of inorganic materials that is abundantly contained in soil. This paper aims to determine the elasticity of Pb metal in the ground the area oil, soil type, and water content in Sebangar village Sub - district Mandau district Bengkalis. Soil samples were taken at two wells with a distance 50 m and 100 m approximately from the pumping petroleum, and two points which embeded measurament is set with a distance of 5 m and 10 m from each well and the depth of 50 cm, respectively. Soil samples printed cylindrical shape with a diameter of 5 cm and a length of 10 cm. The Elasticity can be determined by measuring the propagation time of the primary and secondary waves that propagate on land using Sonic Wave Analyzer (SOWAN) while consentration of Pb was determined using a Atomic Absorpance Spectrometer (AAS) Shimadzu AA-7000. The results show that the greater consentration of Pb has the greater the elasticity is obtained. The consentration of Pb and the elasticity in wells I and II is 5 m from the well, well I has Pb 0,7410 ppm and elasticity 8,1119x107 N/m2 for 10 m Pb 0,6777 ppm and elasticity is 6,2902x107 N/m2. Well II at 5 m has consentration of Pb 0,7501 ppm and elasticity is 4,6815x107 N/m2 for 10 m Pb 0,7151 ppm and elasticity is 4,4393x107 N/m2. According to Ministry of State for Population and Enviromental of Indonesia and Dalhousie University Canada the critical limit of Pb in the soil, the clay in village Sebangar Subdistric Mandau distric Bengkalis under the limits <100 ppm has been found.
INVESTIGASI AKUIFER DISEKITAR DAS (DAERAH ALIRAN SUNGAI) SIAK DI PEKANBARU MENGGUNAKAN METODE RESISTIVITAS KONFIGURASI WENNER DAN KONFIGURASI SCHLUMBERGER
(2013-06-13) Fiizumi, Nurun; Syech, Riad; Sugianto
A Research has been done to determine the aquifer and structure of lithology subsurface at Siak Bridge1, 2, and 3 Pekanbaru by using a geoelectric method in Wenner and Schlumberger electrode configurations. The current and voltage were obtained by using geoelectric equipment. These data were processed by excell to acquire the apparent resistivity. The software of Res2Dinv 3.56 and VES were used to analyze the data, which yield the real resistivity of rock and subsurface of lithology. The interpretations of Res2Dinv 3.56 and VES show that the lithology of Siak Bridge 1, 2, and 3 Pekanbaru consists of clay, sand, sand gravel, and hard core such as granite and limestone. The compressed aquifer was identified in Siak Bridge 1 and 3 where as Siak Bridge 2 was identified as free aquifer. The depth of aqiufer obtained by using Res2Dinv and VES differs each other in only 4 meters.

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