Kerusakan Lingkungan Hidup (LONGSOR)
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Transcript of Kerusakan Lingkungan Hidup (LONGSOR)
![Page 1: Kerusakan Lingkungan Hidup (LONGSOR)](https://reader035.fdocuments.net/reader035/viewer/2022081422/5560ff84d8b42a91388b5455/html5/thumbnails/1.jpg)
KERUSAKAN LINGKUNGAN HIDUP(LONGSOR LAHAN)
GEOGRAFI SMAN 1 CIGOMBONG
Oleh :Ressy Octaviani
Wednesday, April 12, 2023
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PENGERTIAN LONGSOR
Wednesday, April 12, 2023
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Tanah longsor adalah perpindahan material pembentuk lereng berupa batuan, tanah, atau material bergerak ke bawah atau keluar lereng.
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Apa Saja Yang Menyebabkan Longsor ???
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1. Tingkat stabilitas lereng ( tingkat keseimbangan ) yang menurun sampai mencapai kondisi tidak stabil
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2. Tahanan geser batuan lebih kecil dari pada tegangan gesernya
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3. Adanya lapisan batuan permukaan massa tanah yang kedap air dan lunak
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4. Adanya kecukupan air dalam tanah, sehingga lapisan massa tanah menjadi jenuh
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5. Penambangan tanah, batu, atau pasir yang tidak terkendali
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AKIBAT-AKIBAT YANG DITIMBULKAN OLEH
LONGSOR
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1. Terputusnya jaringan listrik dan instalasi air minum
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2. Terputusnya jalan raya, sungai, dan jembatan
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3. Rusaknya areal pertanian dan perkebunan
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4. Banyak memakan korban jiwa
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CARA PENANGGULANGAN LONGSOR
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1. Membuat terasering( sengkedan)
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2. Mengendalikan aliran air, dengan cara drainase
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3. Penanaman pohon dilajur rawan longsor
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WASSALAMUALAIKUM WR.WB
SEKIAN