Uji konduktivitas listrik terhadap kadar air tanah dramaga Bogor dengan metode wenner dan sifat fisik tanahnya
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NIKO MIS SUPRAPTO.Uji Konduktivitas tistrik terhadap kadar Air Tanah Dramaga Bogor
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Telah diiakukan penelitian tentang metode pengukuran elektromagnetik dengan sistem empat
buah elektroda konfigurasi Wenner untuk menentukan konduktivitas listrik lahan s e m
meoghubungkan deogm besamya kadar air tanah yang terkandung pada lahan juga
rnengkarakterisasi sifkt fisika, seperti: bobot isi (Bulk Density), porositas (porosity), indeks
stabilitas agregat (aggregate stability), kandungan mineral, dm tekstur juga sifht kirnmia tanah
untuk menentukan unsur makro dan mikro. Pengukuran konduktivitas listrik dilakukan dengan
variasi kedalaman elektroda 5 cm, 10 crn , dm 15 cm bersamaan dengan pengarnbilan sampel
tanah dengan alat ring sampling untuk 3 kedalaman tersebut Ialu diukur kadar airnya dengan
metode Gi-avimetrik pada wakttl yang random. Sampel tanah juga diambil untuk dianalisis
kandungan mineral dengan mikroskop dan kandungan unsur dengan AAS (Atomic Absorbtion
Spectrometry).
HasiI pengukuran konduktivitas iistrik dm kadar air tanah menunjukkan terdapat hubungm
yang linear pada masing-masing kedalaman elektrodiz. Dengan analisis regresi didapat pada
kedalaman 5cm R~ = 0.784; kedalaman lOcm R~ = 0.928; keddaman 15cm R' = 0.967 ,
pengukuran konduktivitas list& lahan juga mendapatkan bahwa semakin dalarn elektroda
konduktivitas listrik (EC) akan semakin tinggi. Analisis sifat fisika tanah didapatkan karakteristik
lahan peneiitian prosentase pasir antam 31% sampai 34%, debu 31% sampaic35%, liat 36%
sampai 38% dengan indeks stabilitas agregat 131, hasil analisis dengan AAS didapatkan
prosentase kadar unsur makro (P,K,Ca, Mg) dan unsur mikro (Mn, Cu,Zn, B). Analisis mineral
dengan mikoskop didapat komposisi mineral lempung 94.2%, plagioklas 3.4%, kuarsa lZ%,dan
opaq 1.2%.
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P 35
Kata h c i : Bulk density, Aggregate stabiliry, porosity, ring sampler, EC, Atomic absorbtion
spectomew, Gravirnetrik, Konfigurasi Wenner
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Abstract. Have been research about method of electromagnetic measurement with four electrode
system of Wenner configuraton to determine electrical conductivity of buried and also relation to
the water content which consisted. Characterization physical properties, like : Bulk Density,
porosity, aggregate stability, mineral content, and texture also soif chemical properties of buried to
determine micro and macro element. Measurement electrical conductivity is conducted with
variation of deepness of electrode 5 cm, I0 cm ,and 15 cm at the same time with intake of sampel
of land then measured water content with gravimetric methode. Soil sampie also taken to be
analysed by content of mineral with microscope and content of element by AAS ( Atomic
Absorbtion Spectrometry).
Result of measurement of electrical conductivity and water content show there are linear
relation for each electrode deepness. With regresion analysis got at deepness 5cm R
' = 0.784;
lOcm R~= 0.928; I5cm It2 = 0.967 , measurement electrical conductivity of buried also get that
progressively in electrode of electrical conductivity ( EC) of Excelsior. Physical analysis
properties got characteristic of buried of research of percentage of sand betwen 31% until 34%,
dirt 3 1% until 35%, 36% until 38% with aggregate stability index 131, result analyse by AAS got
percentage of macro element ( P, K,Ca, Mg) and the micro element ( Mn,Cu, Zn, B). Andyse
mineral with microscope got composition of mineral of clay 94.5%, plagioclas 3.4%, quartz
f .2%,dan opaque 1.2%.
Key words : Bulk density, Aggregure stabiliry, porosity, EC, Atomic absorbtion spectomerry,
Gravimetric, Wenner Configuration
NIKO MIS SUPRAPTO.Uji Konduktivitas tistrik terhadap kadar Air Tanah Dramaga Bogor
gxpg
3
z::
dengan Metode Wenner dan Sifat Fisik Tanahnya. Dibimbing oleh IRZAMAN dan IMAM
' Q s s
3 5" ."53, I
'2QQ s Qs sm
s "r s
Q
SANTOSO.
2EQgfj
Q
rz
r)
g Q
ABSTRAK
%3sgcl
$2zU2.=
C S Q S
4
sg
C
G!Q
Q
2;
Telah diiakukan penelitian tentang metode pengukuran elektromagnetik dengan sistem empat
buah elektroda konfigurasi Wenner untuk menentukan konduktivitas listrik lahan s e m
meoghubungkan deogm besamya kadar air tanah yang terkandung pada lahan juga
rnengkarakterisasi sifkt fisika, seperti: bobot isi (Bulk Density), porositas (porosity), indeks
stabilitas agregat (aggregate stability), kandungan mineral, dm tekstur juga sifht kirnmia tanah
untuk menentukan unsur makro dan mikro. Pengukuran konduktivitas listrik dilakukan dengan
variasi kedalaman elektroda 5 cm, 10 crn , dm 15 cm bersamaan dengan pengarnbilan sampel
tanah dengan alat ring sampling untuk 3 kedalaman tersebut Ialu diukur kadar airnya dengan
metode Gi-avimetrik pada wakttl yang random. Sampel tanah juga diambil untuk dianalisis
kandungan mineral dengan mikroskop dan kandungan unsur dengan AAS (Atomic Absorbtion
Spectrometry).
HasiI pengukuran konduktivitas iistrik dm kadar air tanah menunjukkan terdapat hubungm
yang linear pada masing-masing kedalaman elektrodiz. Dengan analisis regresi didapat pada
kedalaman 5cm R~ = 0.784; kedalaman lOcm R~ = 0.928; keddaman 15cm R' = 0.967 ,
pengukuran konduktivitas list& lahan juga mendapatkan bahwa semakin dalarn elektroda
konduktivitas listrik (EC) akan semakin tinggi. Analisis sifat fisika tanah didapatkan karakteristik
lahan peneiitian prosentase pasir antam 31% sampai 34%, debu 31% sampaic35%, liat 36%
sampai 38% dengan indeks stabilitas agregat 131, hasil analisis dengan AAS didapatkan
prosentase kadar unsur makro (P,K,Ca, Mg) dan unsur mikro (Mn, Cu,Zn, B). Analisis mineral
dengan mikoskop didapat komposisi mineral lempung 94.2%, plagioklas 3.4%, kuarsa lZ%,dan
opaq 1.2%.
WE
P 35
Kata h c i : Bulk density, Aggregate stabiliry, porosity, ring sampler, EC, Atomic absorbtion
spectomew, Gravirnetrik, Konfigurasi Wenner
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82
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Abstract. Have been research about method of electromagnetic measurement with four electrode
system of Wenner configuraton to determine electrical conductivity of buried and also relation to
the water content which consisted. Characterization physical properties, like : Bulk Density,
porosity, aggregate stability, mineral content, and texture also soif chemical properties of buried to
determine micro and macro element. Measurement electrical conductivity is conducted with
variation of deepness of electrode 5 cm, I0 cm ,and 15 cm at the same time with intake of sampel
of land then measured water content with gravimetric methode. Soil sampie also taken to be
analysed by content of mineral with microscope and content of element by AAS ( Atomic
Absorbtion Spectrometry).
Result of measurement of electrical conductivity and water content show there are linear
relation for each electrode deepness. With regresion analysis got at deepness 5cm R
' = 0.784;
lOcm R~= 0.928; I5cm It2 = 0.967 , measurement electrical conductivity of buried also get that
progressively in electrode of electrical conductivity ( EC) of Excelsior. Physical analysis
properties got characteristic of buried of research of percentage of sand betwen 31% until 34%,
dirt 3 1% until 35%, 36% until 38% with aggregate stability index 131, result analyse by AAS got
percentage of macro element ( P, K,Ca, Mg) and the micro element ( Mn,Cu, Zn, B). Andyse
mineral with microscope got composition of mineral of clay 94.5%, plagioclas 3.4%, quartz
f .2%,dan opaque 1.2%.
Key words : Bulk density, Aggregure stabiliry, porosity, EC, Atomic absorbtion spectomerry,
Gravimetric, Wenner Configuration