Laju Infiltrasi pada Area Tanah Longsor di Banyuasin Kembaran, Loano, Purworejo

DHONY KURNIAWAN, Nur Ainun Harlin Jennie Pulungan, M. Sc., Ph. D.; Ir. Suci Handayani, M. P.

2023 | Skripsi | S1 ILMU TANAH

Penelitian terkait laju infiltrasi pada area tanah longsor telah banyak dilakukan, namun kajian mengenai pola dari pengaruh karakterisitik tanah terhadap laju infiltrasi belum banyak dilakukan. Penelitian ini memiliki beberapa tujuan, diantaranya (1) mengidentifikasi area longsor di lokasi penelitian; (2) menentukan karakteristik tanah yang berpengaruh terhadap laju infiltrasi; (3) mengkaji pola dari karakteristik tanah yang berpengaruh terhadap laju infiltrasi pada masing-masing zonasi longsor; serta (4) mengkaji pola laju infiltrasi pada masing-masing zonasi longsor. Pengumpulan data yang dilakukan yaitu kegiatan pra-lapangan, lapangan, dan analisis data. Penentuan titik sampel menggunakan metode purposive berdasarkan bentuklahan. Area longsor dipilih secara acak kemudian pengambilan sampel tanah diambil pada setiap bagian longsor yaitu mahkota, badan, dan kaki longsor. Analisis data dilakukan secara deskriptif kualitatif untuk mengetahui kondisi morfologi lahan pada setiap longsor dan secara deskriptif kuantitatif untuk mengetahui pengaruh karakteristik lahan terhadap laju infiltrasi. Hasil penelitian menunjukkan keterkaitan antar karakteristik tanah terhadap laju infiltrasi didaerah penelitian.

Several research about the soil infiltration rate in landslide area has been conducted. However, few research studies on the influence of soil characteristics on infiltration rate. This research aims to (1) identify of landslide area at study site; (2) determining soil characteristics that affect the rate of infiltration; (3) assessing the pattern of soil characteristics that affect the rate of infiltration in each landslide zone; and (4) assessing the pattern of infiltration rate in each landslide zone. Data collection was carried out, including pre-field, field, and data analysis activities. Determination of sample points using the purposive method. Landslides area were selected randomly and soil samples were collected on each part of the landslide at top, middle, and bottom. Data analysis was carried out qualitative descriptive to determine land morphology conditions in each landslide and quantitative descriptive to determine the effect of land characteristics on infiltration rate. The results showed the correlation between soil characteristics and the infiltration rate in the study area.

Kata Kunci : karakteristik tanah, laju infiltrasi, longsor, purposive, zonasi