?url_ver=Z39.88-2004&rft_id=1815051024&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=IDENTIFIKASI+DAERAH+RAWAN+LONGSOR+DAN+GEMPABUMI++BERDASARKAN+ANALISIS+HORIZONTAL+TO+VERTICAL+SPECTRAL+RATIO+(HVSR)++DI+WILAYAH+SEMAKA+KABUPATEN+TANGGAMUS&rft.creator=Denta%2C+Winardi&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Kecamatan+Semaka+terletak+di+selatan+Kabupaten+Tanggamus+Provinsi+Lampung+yang+dekat+dengan+zona+subduksi+dan+sesar+aktif.+Pada+mitigasi+bencana+tanah+longsor%2C+diperlukan+karakteristik+geologi+atau+dinamika+lapisan+tanah.+Penelitian+ini+bertujuan+untuk+menganalisis+klasifikasi+tanah+berdasarkan+frekuensi+dominan+dan+periode+dominan%2C+menganalisis+faktor+amplifikasi%2C+menganalisis+kerentanan+tanah+dan+ketebalan+sedimen%2C+menentukan+nilai+percepatan+getaran+tanah+maksimum+(PGA)+.+Tahapan+dalam+penelitian+ini+terdiri+dari+pengolahan+data+untuk+memperoleh+nilai+frekuensi+dominan%2C+amplifikasi%2C+indeks+kerentanan+tanah%2C+ketebalan+sedimen%2C+Vs30+dan++menghitung+nilai+PGA+berdasarkan+sumber+gempa+dari+Sesar+Semangko+dan+membuat+peta+zona+rawan+bencana+tanah+longsor+di+Kecamatan+Semaka.+Persebaran+frekuensi+dominan+di+Kecamatan+Semaka+berkisar+antara+2%2C18+%E2%80%93+13%2C48+Hz.+Sedangkan+nilai+periode+dominan+berkisar+antara+nilai+0%2C074+s+hingga+0%2C45+s.+Nilai+amplifikasi+sebesar+nilai+faktor+++amplifikasi+berada+pada+kisaran+1%2C04+%E2%80%93+4%2C9+kali.+Nilai+indeks+kerentanan+tanah+di+Kecamatan+Semaka+Kabupaten+Tanggamus+berada+pada+kisaran+0%2C2+cm%2Fs2+hingga+3%2C21+cm%2Fs2.+dan+nilai+ketebalan+sedimen+berada+pada+kisaran+nilai+10+m+hingga+80+m.+Berdasarkan+nilai+kemiringan+lereng+dan+faktor+geologi+ketebalan+sedimen+dan+daerah+paling+rentan+terhadap+bencana+tanah+longsor+yaitu+pada+Pekon+Sedayu+dan+sukaraja.%0D%0A%0D%0AKata+kunci+%3A+Kecamatan+Semaka%2C+Sesar+Semangko%2C+Klasifikasi+Tanah%2C++PGA+dan+Longsor%0D%0A%0D%0ASemaka+District+is+located+in+the+south+of+Tanggamus+Regency%2C+Lampung+Province+which+is+close+to+subduction+zones+and+active+faults.+In+mitigating+landslides%2C+geological+characteristics+or+dynamics+of+the+soil+layers+are+needed.+This+study+aims+to+analyze+site+class+based+on+dominant+frequency+and+dominant+period%2C+analyze+amplification+factors%2C+analyze+soil+susceptibility+and+sediment+thickness%2C+determine+the+maximum+ground+vibration+acceleration+(PGA)+value.+The+stages+in+this+study+consisted+of+data+processing+to+obtain+dominant+frequency+values%2C+amplification%2C+soil+vulnerability+index%2C+sediment+thickness%2C+Vs30+and+calculating+the+PGA+value+based+on+the+earthquake+source+from+the+Semangko+Fault+and+making+a+map+of+the+landslide+prone+zones+in+Semaka+District.+The+distribution+of+dominant+frequencies+in+Semaka+District+ranges+from+2.18+%E2%80%93+13.48+Hz.+While+the+dominant+period+values+range+from+0.074+s+to+0.45+s.+The+amplification+value+of+the+amplification+factor+value+is+in+the+range+of+1.04+%E2%80%93+4.9+times.+Soil+vulnerability+index+values+in+Semaka+District%2C+Tanggamus+Regency+are+in+the+range+of+0.2+cm%2Fs2+to+3.21+cm%2Fs2.+and+the+sediment+thickness+values+are+in+the+range+of+10+m+to+80+m.+Based+on+the+value+of+the+slope%2C+the+geological+factor+and+the+thickness+of+the+sediment++the+areas+most+vulnerable+to+landslides+are+Pekon+Sedayu+and+Sukaraja.%0D%0A%0D%0AKeywords+%3A+Semaka+District%2C+Semangko+Fault%2C+site+effect%2C+++PGA+and+landslide%0D%0A&rft.publisher=Fakultas+Teknik&rft.date=2022-12-06&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F68365%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F68365%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F68365%2F3%2FSKRIPSI%2520FULL%2520TANPA%2520PEMBAHASAN.pdf&rft.identifier=++Denta%2C+Winardi++(2022)+IDENTIFIKASI+DAERAH+RAWAN+LONGSOR+DAN+GEMPABUMI+BERDASARKAN+ANALISIS+HORIZONTAL+TO+VERTICAL+SPECTRAL+RATIO+(HVSR)+DI+WILAYAH+SEMAKA+KABUPATEN+TANGGAMUS.++Fakultas+Teknik%2C+Universitas+Lampung.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F68365%2F