kedalaman yang lebih besar di lereng agak atas, dan peran air bumi meningkat dari aliran airbumi sebelumnya. Pada saat kurva hidrograf menurun, debit airbumi menurun dibandingkan pada puncak hujan.
9.2Saran
Penelitian ini terlaksana dengan melalukan beberapa pendekatan melalui metodologi yang telah banyak dilakukan di luar negeri oleh para peneliti hidrologi proses. Untuk mendapatkan informasi yang lebih komprehensif tentang perilaku hidrokimia di dalam DAS, perlu dikembangkan penelitian sejenis pada masa yang akan datang, didukung oleh peralatan yang lebih memadai. Persamaan – persamaan dan model matematik serta penggunaan perangkat Sistem Informasi Geografis juga perlu dikembangkan dalam menyusun dinamika aliran bawah permukaan . Karena teknik pemisahan aliran permukaan ini dapat mengkuantifikasi sumber (source) limpasan yang sangat penting dalam mendesain stuktur hidraulik, evaluasi model hujan-aliran permukaan, mempelajari proses pengendalian banjir, serta pendugaan dan pengurangan kontaminasi air.
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Lampiran 1 Hasil pengamatan kedalaman tanah dan batuan (bedrock) untuk
pemasangan peralatan pengamatan hidrokimia di DAS mikro Cakardipa.
Titik Pengamatan ke-1 (L1)
No Kedalaman (cm) Keterangan
1 0-100 Warna coklat kekuningan
2 100-200 Warna coklat kekuningan
3 200-300 Warna coklat kekuningan
4 300-400 Warna coklat kekuningan
5 400-500 Tanah bercampur batuan cadas (tufa) lunak
6 500-600 Tanah bercampur batuan cadas (tufa) lunak
7 600-700 Tanah bercampur batuan cadas (tufa) lunak
8 700-800 Tanah bercampur batuan cadas (tufa) lunak
9 800-900 Lahar lunak
10 900-1000 Lahar lunak bercampur dengan bahan lava
11 1000-1100 Lava lunak
12 1100-1200 Lava dengan kekerasan sedang
13 1200-1250 Lava dengan kekerasan sedang
14 > 1250 Lava keras tidak tembus bor dan kedap air
Titik Pengamatan ke-2 (L2)
No Kedalaman (cm) Keterangan
1 0-100 Warna coklat kekuningan (uraian profil tanah L1)
2 100-200 Warna coklat kekuningan
3 200-300 Warna coklat kekuningan
4 300-400 Tanah bercampur batuan cadas (tufa) lunak
5 400-500 Tanah bercampur batuan cadas (tufa) lunak
6 500-600 Tanah bercampur batuan cadas (tufa) lunak
7 600-700 Lahar lunak
8 700-800 Lahar lunak bercampur dengan bahan lava
9 800-900 Lava dengan kekerasan sedang
10 >900 Lava keras tidak tembus bor dan kedap air
Titik Pengamatan ke-3 (L3)
No Kedalaman (cm) Keterangan
1 0-150 Warna coklat kekelabuan
2 150-250 Warna coklat kekelabuan tekstur berkerikil
3 250-300 Warna coklat kekelabuan
4 300-400 Lahar lunak
5 400-450 Lava andesit kekerasan sedang, kedap air
Titik Pengamatan ke-4 (L4)
No Kedalaman (cm) Keterangan
1 0-100 Warna coklat kekelabuan
2 100-150 Warna coklat kekuningan , berkerikil hancuran tufa
3 150-200 Lahar lunak
4 200-290 Lava keras
5 >290 Lava tidak tembus dan kedap
Titik Pengamatan ke-5 (L5)
No Kedalaman (Cm) Keterangan
1 0-50 Tanah
2 50-100 Kerikil lepas
3 >100 Lava keras tidak tembus
Titik Pengamatan ke-6 (L6)
No Kedalaman (cm) Keterangan
1 0-100 Aluvial coklat agak padat
2 100-200 Aluvial berlumpur
3 200-280 Lapisan tanah berkerikil
4 280-400 Lapisan Tufa
5 >400 Lava keras dan kedap air
Titik Pengamatan ke-7 (L7)
No Kedalaman (cm) Keterangan
1 0-50 Aluvial coklat agak padat
2 50-150 Aluvial lunak
3 150-180 Lapisan kerikil
4 >180 Lava, keras, kedap air
Titik Pengamatan ke-8 (L8)
No Kedalaman (cm) Keterangan
1 0-150 Andosol Coklat , lunak
2 150-200 Horizon BC, agak lunak
3 200-400 Tufa andesit lunak
4 400-470 Tufa andesit agak keras tembus air
Titik Pengamatan ke-9 (L9)
No Kedalaman (cm) Keterangan
1 0-150 Andosol Coklat , lunak
2 150-200 Horizon BC, agak lunak
3 200-400 Tanah Andosol Coklat lunak
4 400-470 Horizon II BC, agak keras, tembus air
5 >470 Lava, Keras, Kedap Air
Titik Pengamatan ke-10 (L10)
No Kedalaman (cm) Keterangan
1 0-200 Andosol Coklat , lunak
2 200-250 Horizon BC, agak lunak
3 250-650 Tanah Andosol Coklat , lunak
4 650-670 Horizon II BC, agak keras, tembus air
5 670-1200 Tufa volkan lunak, bertekstur, SiCl dan tembus air
Lampiran 2 Uraian Profil Tanah Lereng Sebelah Timur
No pengamatan : 1
Fisiografi : Lungur volkan
Bahan Induk : Lahar dan tufa andesit Bentuk wilayah : Berbukit memanjang
Lereng : 35 %, posisi lereng atas
Keadaan permukaan : Terasering Penggunaan lahan : Kebun campuran
Vegetasi : afrika, pisang, talas, ubikayu
Klasifikasi
USDA 2007 : Typic Dystruepts
PPT 1983 : Latosol Coklat Kekuningan