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BAB V

KESIMPULAN DAN SARAN

5.1 Kesimpulan

Dari hasil analisa dan intepretasi dapat dibuat kesimpulan sebagai berikut :

1. Dari pengukuran GPS di 19 titik pada bulan Maret – April 2014

daerah di sekitar Lusi mud volcano mengalami subsidence

(penurunan) dan uplift (kenaikan)

2. Pengukuran GPS pada bulan Maret didapatkan nilai perubahan tinggi

antara -0.952 m (Titik BT01) sampai 0.367 m (DG11)

3. Tingkat perubahan tinggi di daerah Porong pada bulan April

didapatkan -0-.028 m/bulan sampai 0.010 m/bulan dengan penurunan

tinggi mengarah ke Barat Daya.

4. Pengukuran GPS di 19 titik pada bulan Mei didapatkan perubahan

tinggi antara -0.935 m (DGIJK) sampai 0.255 m (DG09)

5. Tingkat perubahan tinggi di daerah Porong pada bulan April

didapatkan -0-.026 m/bulan sampai 0.059 m/bulan dengan penurunan

tinggi mengarah ke barat

6. Hasil pengukuran 5 lintasan VLF-EM didapatkan nilai resitivitas 2D

bawah permukaan tanah yang bervariasi. Nilai resitivitas <30Ωm

menunjukkan daerah yang tersaturai air dari bubble sedangkan nilai

resitivitas >50Ωm merupakan daerah rekahan dan patahan dangkal.

7. Dari hasil pengukuran GPS dan VLF-EM daerah LUSI mud volcano

masih perilaku yang menarik dengan ditandai dengan penuruanan

tanah yang masih signifikan dan intepretasi bawah permukaan VLF

yang menunjukkan patahan dan rekahan.

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5.2 Saran

Dari penelitian ini diusulkan saran sebagai berikut :

1. Dilakukan pengukuran GPS secara kontinu dengan lama pengamatan lebih

lama diatas 6 jam dan penambahan jumlah titik pengamatan sehingga di

dapatkan kualitas data yang lebih baik.

2. Dilakukan pengukuran VLF-EM dilintasan sebelah Utara, Timur dan

Selatan Tanggul untuk membandingkan nilai VLF-E dibagian Barat

tanggul

3. Membandingkan dengan data terbaru INSAR, geolistrik, seismik guna

mendapatkan analisis yang lebih lengkap mengenai land subsidence

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