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All Journal Jurnal Ecosolum Forum Geografi MEDIAN JURNAL METEOROLOGI DAN GEOFISIKA
Asmita Ahmad
Departemen Ilmu Tanah Universitas Hasanuddin,Fakultas Pertanian Kampus Unhas Tamalarea Jl. Perintis Kemerdekaan Km.10 Makassar, 90245. Sulawesi Selatan, Indonesia
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Physics Other

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Landslide Zonation at the Budong-Budong Watershed, Central Mamuju District of West Sulawesi Province Paharuddin, Paharuddin; Ahmad, Asmita; Ansar, Muh.; Solle, Muchtar S
Forum Geografi Vol 28, No 2 (2014)
Publisher : Forum Geografi

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The objectives of this study are as  follows: first, to investigate the contributing parameters induced land sliding in the Budong-Budong watershed, and second, to construct landslide susceptibility zonation map.  In this study, the analytical hierarchy process (AHP) based on Geographical Information System (GIS) methods was used to produce map of landslide susceptibility. In this study area, more than 50% of total area were classified high (H) to very high (VH)  susceptibility landslide zone.  Mean while, 12% of total area were classified as  moderate (M)  and remaining were classified as  low (L) to very low (VL) susceptibility landslide zone. Almost area of Budong-Budong Wetershed were classified as VH and H susceptibility landslide zone underlying by Talaya (Tmtv), Lamasi (Toml) and Latimojong (Kls) Formation on the steep slope land.
Landslide Zonation at the Budong-Budong Watershed, Central Mamuju District of West Sulawesi Province Solle, Muchtar S; Paharuddin, Paharuddin; Ahmad, Asmita; Ansar, Muh.
Forum Geografi Vol 28, No 2 (2014): December 2014
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v28i2.429

Abstract

The objectives of this study are as  follows: first, to investigate the contributing parameters induced land sliding in the Budong-Budong watershed, and second, to construct landslide susceptibility zonation map.  In this study, the analytical hierarchy process (AHP) based on Geographical Information System (GIS) methods was used to produce map of landslide susceptibility. In this study area, more than 50% of total area were classified high (H) to very high (VH)  susceptibility landslide zone.  Mean while, 12% of total area were classified as  moderate (M)  and remaining were classified as  low (L) to very low (VL) susceptibility landslide zone. Almost area of Budong-Budong Wetershed were classified as VH and H susceptibility landslide zone underlying by Talaya (Tmtv), Lamasi (Toml) and Latimojong (Kls) Formation on the steep slope land.
Analisis Kinerja Sub DAS Bila dengan Pendekatan lahan dan Tata Air Khairul Anami, Muhammad Fitrah; Lias, Syamsul Arifin; Ahmad, Asmita
Jurnal Ecosolum Vol. 9 No. 1 (2020): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v9i1.8868

Abstract

The watershed can be seen as a natural system where hydrological biophysic processes and community socio-economic activities take place which results in changes in the carrying capacity of watersheds. The issuance of Government Regulation Number 37 of 2012 concerning Watershed Management became the legal basis for the watershed management to evaluate the Performance of Watershed. At present, the watershed hydrology condition in Wajo district is decreasing which causes an increase in sedimentation in Lake Tempe. This study uses the Purposive Sampling method, gravimetry for determining total suspended solid values, and river discharge measurement. The results showed that the value of Total suspended Solid was still relatively good in the range of 0-100 mg L. For land parameters, the percentage of critical land is included in the medium category, the percentage of vegetation cover is in the bad category, and the erosion index is in the very low category. For the parameters of quality, quantity and water continuity, the flow regime coefficient is in the medium category, the annual flow regime coefficient is in the low category, sediment load is in the very low category, and the water use index is in the very good class. So that the performance of Bila Sub-watershed was included in the medium category. The results showed that the performance of Sub-watershed included in the medium category. The performance of Bila Sub-watershed included in the medium category and did not have a significant sedimentation influence to Lake of Tempe, especially in July.
Analisis Kinerja Sub DAS Bila dengan Pendekatan lahan dan Tata Air Muhammad Fitrah Khairul Anami; Syamsul Arifin Lias; Asmita Ahmad
Jurnal Ecosolum Vol. 9 No. 1 (2020): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v9i1.8868

Abstract

The watershed can be seen as a natural system where hydrological biophysic processes and community socio-economic activities take place which results in changes in the carrying capacity of watersheds. The issuance of Government Regulation Number 37 of 2012 concerning Watershed Management became the legal basis for the watershed management to evaluate the Performance of Watershed. At present, the watershed hydrology condition in Wajo district is decreasing which causes an increase in sedimentation in Lake Tempe. This study uses the Purposive Sampling method, gravimetry for determining total suspended solid values, and river discharge measurement. The results showed that the value of Total suspended Solid was still relatively good in the range of 0-100 mg L. For land parameters, the percentage of critical land is included in the medium category, the percentage of vegetation cover is in the bad category, and the erosion index is in the very low category. For the parameters of quality, quantity and water continuity, the flow regime coefficient is in the medium category, the annual flow regime coefficient is in the low category, sediment load is in the very low category, and the water use index is in the very good class. So that the performance of Bila Sub-watershed was included in the medium category. The results showed that the performance of Sub-watershed included in the medium category. The performance of Bila Sub-watershed included in the medium category and did not have a significant sedimentation influence to Lake of Tempe, especially in July.
Landslide Zonation at the Budong-Budong Watershed, Central Mamuju District of West Sulawesi Province Muchtar S Solle; Paharuddin Paharuddin; Asmita Ahmad; Muh. Ansar
Forum Geografi Vol 28, No 2 (2014): December 2014
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v28i2.429

Abstract

The objectives of this study are as  follows: first, to investigate the contributing parameters induced land sliding in the Budong-Budong watershed, and second, to construct landslide susceptibility zonation map.  In this study, the analytical hierarchy process (AHP) based on Geographical Information System (GIS) methods was used to produce map of landslide susceptibility. In this study area, more than 50% of total area were classified high (H) to very high (VH)  susceptibility landslide zone.  Mean while, 12% of total area were classified as  moderate (M)  and remaining were classified as  low (L) to very low (VL) susceptibility landslide zone. Almost area of Budong-Budong Wetershed were classified as VH and H susceptibility landslide zone underlying by Talaya (Tmtv), Lamasi (Toml) and Latimojong (Kls) Formation on the steep slope land.
Karateristik Tanah Sawah Dari Batuan Lava-Vulkanik Di Lereng Gunung Lompobattang, Sulawesi Selatan Asmita Ahmad; Zakina Fauzi Alamudi; Christianto Lopulisa
Median : Jurnal Ilmu Ilmu Eksakta Vol. 11 No. 3 (2019): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1251.747 KB) | DOI: 10.33506/md.v11i3.567

Abstract

Aktivitas vulkanik dan material yang dihasilkannya telah mempengaruhi proses pedogenesis tanah-tanah di Indonesia. Penelitian ini bertujuan untuk mengetahui karateristik morfologi serta mineralogi lahan sawah yang berkembang dari batuan vulkanik di kaki lereng Gunung Lompobattang Desa Bulukumpa Kabupaten Bulukumba Sulawesi Selatan. Metode penelitian yang digunakan adalah metode survei melalui pengamatan dan deskripsi 3 buah profil sepanjang transek dan pengambilan contoh tanah, analisis mineralogi tanah dengan mikroskop polarisasi dan X-Ray Difraktometer (XRD). Hasil analisis sifat kimia tanah pada profil 3 menunjukkan horison A memiliki kandungan liat 67,45%, debu 28,93%, pasir 3,61%. Kapasitas tukar kation (KTK) 16 cmol(+)/kg, reaksi tanah (pH) 5,5 dan kejenuhan basa 36,75%. Horison B mempunyai tekstur liat dengan kandungan liat 83,28%, debu 7,16%, pasir 9,55%. Kapasitas tukar kation (KTK) yaitu 27,29 cmol(+)/kg, reaksi tanah (pH) 5,3 dan kejenuhan basa 27,29%. Kandungan mineral yang dijumpai pada profil 1 adalah mineral piroksin, kuarsa, muskovit, oksida besi, profil 2 mineral yang diidentifikasi adalah mineral plagioklas, kuarsa, oksida besi dan muskovit, dan profil 3 dijumpai mineral piroksin, muskovit, kuarsa dan oksida besi. Keberadaan mineral illit dan kaolinit pada ke 3 profil menggambarkan proses pedogenesis di daerah penelitian berada pada tahap sedang hingga lanjut.
STUDI IKLIM PURBA PADA FORMASI TONASA BERDASARKAN FORAMINIFERA PLANKTONIK LINTASAN SUNGAI PALAKKA DAN KARAMA B, SULAWESI SELATAN Meutia Farida; Asri Jaya; Ilham Alimuddin; Safruddim Safruddim; Asmita Ahmad
Jurnal Meteorologi dan Geofisika Vol 23, No 2 (2022)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1259.934 KB) | DOI: 10.31172/jmg.v23i2.839

Abstract

Foraminifera planktonik adalah salah satu proxy dalam penentukan iklim, termasuk iklim purba. Organisme ini memiliki sebaran geografi yang luas, dan beberapa spesies hidup pada kondisi iklim tertentu, sehingga keberadaan fosil ini sangat baik digunakan untuk interpretasi perubahan iklim dari masa ke masa. Formasi Tonasa memiliki sebaran yang luas di Sulawesi Selatan. Formasi ini disusun oleh batuan karbonat yang terbentuk dari mineral karbonat dan organisme laut diantaranya adalah foraminifera, yang dapat merekam kondisi iklim ketika batuan ini terendapkan. Pengambilan data singkapan menggunakan metode Stratigrafi Terukur pada perselingan napal dan batugamping di Barru (Lintasan Sungai Palakka) dan Jeneponto (Lintasan Karama B). Aktivitas selanjutnya adalah preparasi sampel, observasi, identifikasi dan determinasi umur berdasarkan pemunculan awal dan kemunculan akhir spesies. Hasil identifikasi foraminifera planktonik di daerah Barru diperoleh sebanyak 12 spesies: Globigerina senni, Globigerina ampliapertura, Globigerina soldadoensis, Globigerina yeguaensis, Globorotalia centralis, Globorotalia aragonensis, Globorotalia aspensis, Globorotalia bolivariana, Globigerina collactea, Hantkenina dumblei, dan Hantkenina brevispina, Globigerapsis index. Di Karama B sebanyak 6 (enam) spesies: Globigerina ampliapertura, Globigerina yeguaensis, Globorotalia kugleri, Catapsydrax dissimilis, Globorotalia siakensis, Globigerinoides immaturus, dan 1 sub-spesies Globorotalia opima opima. Analisis biostratigrafi Lintasan Sungai Palakka berumur P.9 – P.16 (Eosen Awal – Eosen Akhir), sedangkan Lintasan Karama B, berumur N.1 – N.7 (Oligosen Tengah – Miosen Awal). Hasil studi awal iklim purba menunjukkan bahwa beberapa genus/spesies di daerah Palakka dan Karama B hidup pada kondisi iklim Tropis – Subtropis, Sungai Palakka hangat (warm), sedangkan Karama B (cooling – warm). Berkurangnya variasi genus/spesies pada transisi umur Eosen ke Oligosen diakibatkan oleh perubahan iklim yang signifikan dari hangat ke dingin (cooling).
Co-Authors Alamudi, Zakina Fauzi Asri Jaya Ilham Alimuddin Khairul Anami, Muhammad Fitrah Lias, Syamsul Arifin Lopulisa, Christianto Meutia Farida Muchtar S Solle Muchtar S Solle, Muchtar S Muh. Ansar, Muh. Muhammad Fitrah Khairul Anami Paharuddin Paharuddin Paharuddin Paharuddin, Paharuddin Safruddim Safruddim Zakina Fauzi Alamudi