KUNCOROJATI, M. FADLI (2015) EVALUASI EROSI PADA DUA JENIS TANAMAN PENUTUP DENGAN METODE PETAK KECIL DAN TONGKAT UKUR DI AREA REKLAMASI PT. ADARO INDONESIA KABUPATEN TABALONG PROVINSI KALIMANTAN SELATAN. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
ABSTRACT
In order to reduce erosion, PT. Adaro Indonesia has made efforts to planting
some various type of cover crop’s canopy on reclamation area. But the results of
these activities have not been analyzed further. The goal of this study is to compare
the rate of erosion and run-off on two different types of cover crop with multislot
deviser method and measured stick method in the reclamation area of PT. Adaro
Indonesia.
The method used in this research are the field method, laboratory method,
mathematical method, and so the multislot deviser and measured stick methods to
measured the erosion rate. Fields methods is carried by field surveys and
observations to determine the slope length, slope rate, land cover and vegetation.
Determining sample points in this research were used by the Purposive
sampling technique. Location of this study were divided into two places in
accordance with the conditions of cover crop. Disposal S12 representing the grass
cover crop and Disposal C34 representing the broadleaf cover crop. The erosion data
obtained from measurements by the multilot deviser and measured stick
method. Measurements erosion by using multislot deviser method are carried out
every day after the rainfall , while the measured stick data were collected every three
weeks. Laboratory methods use to analyzed the bulk density (BV) and measuring the
soil dry weight. Thereafter the mathematical calculations performed to calculate the
total soil erosion and run off at the two different types of cover crop.
The results proved that the erosion rate measurements by using multislot deviser
methods in Disposal S12 which representing the grassed cover crop conditions is
81.16 tons/ha/year. While on Disposal C34 which representing broadleaf cover
crop condition is 16.91 tons/ha/year. Afterwards the erosion rate measurements with
measured stick method in Disposal S12 is 959,87 tons/ha/year. While on Disposal
C34 is 761,23 tons/ha/year.
Keywords: Reclamation Area, Erosion and Run-Off, Cover Crop, Multislot Deviser
Methods, and Measured Stick Methods
INTISARI
Dalam rangka mengurangi erosi, PT. Adaro Indonesia telah melakukan upaya
penanaman cover crop di lahan reklamasi dengan variasi jenis tajuk. Namun hasil
kegiatan tersebut belum dianalisis lebih lanjut. Tujuan yang hendak dicapai dari
penelitian ini yaitu membandingkan laju erosi dan limpasan permukaan pada dua
jenis cover crop yang berbeda dengan metode petak kecil dan metode tongkat di
lahan reklamasi PT. Adaro Indonesia.
Metode yang digunakan dalam penelitian ini adalah metode lapangan, metode
laboratorium, metode matematis, serta metode pengukuran erosi dengan petak kecil
dan tongkat ukur. Metode lapangan dilaksananan melalui survei dan observasi untuk
mengetahui panjang lereng, kemiringan lereng, dan vegetasi penutup lahan.
Penentuan titik sampel dalam penelitian ini menggunakan teknik purposive
sampling. Lokasi penelitian terbagi menjadi dua tempat sesuai dengan kondisi cover
crop, yaitu Disposal S12 (cover crop berdaun runcing) dan Disposal C34 (cover crop
berdaun lebar). Data erosi didapatkan dari pengukuran metode petak kecil dan
tongkat ukur. Pengukuran erosi petak kecil dilakukan setiap setelah terjadinya hari
hujan, sedangkan data erosi tongkat diambil setiap tiga minggu. Metode laboratorium
digunakan untuk analisis berat volume (BV) dan berat kering tanah. Kemudian
perhitungan matemat is dilakukan untuk menghitung total erosi tanah dan limpasan
permukaan pada dua jenis cover crop yang berbeda.
Hasil penelitian menunjukkan bahwa pengukuran laju erosi dengan metode
petak kecil di Disposal S12 (cover crop berdaun runcing) adalah 81,16
Ton/Ha/Tahun. Sedangkan pada Disposal C34 (cover crop berdaun lebar) yaitu
16,91 Ton/Ha/Tahun. Kemudian pengukuran laju erosi dengan metode tongkat ukur
pada Disposal S12 adalah 959,87 Ton/Ha/Tahun. Sedangkan pada Disposal C34
yaitu 761,23 Ton/Ha/Tahun.
Kata kunci : Lahan Reklamasi, Erosi dan Limpasan Permukaan, Cover crop,
Metode Petak Kecil, dan Metode Tongkat Ukur
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TD Environmental technology. Sanitary engineering |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Ratna Sufiatin |
| Date Deposited: | 08 Jun 2016 06:20 |
| Last Modified: | 08 Jun 2016 06:20 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/3294 |
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