Wisnumurti, Danang (2015) SEBARAN INDEKS BAHAYA EROSI PADA KAWASAN RAWAN BENCANA ERUPSI MERAPI DI DESA KEPUHARJO KECAMATAN CANGKRINGAN KABUPATEN SLEMAN. Other thesis, UPN "VETERAN" YOGYAKARTA.
Preview |
Text
ABSTRACT.pdf Download (53kB) | Preview |
Preview |
Text
abstrak.pdf Download (39kB) | Preview |
Abstract
Kepuharjo village located approximately 10 km from the Summit of Mount
Merapi with the majority of the young soils comes from the material result of the
eruption of Mount Merapi. The new soils did not yet have a steady aggregate due
to the womb clays and organic materials low which makes the lack of power
between connective particles so it is easy to be further eroded. The topography of
steep and sloping up to a factor of vegetation around the troubled aftermath of the
eruption that occurred in the village of Kepuharjo due to Disaster-prone Regions
are in a eruption of Mount Merapi causes soil against erosion sensitivity can occur
becomes larger. The rationale for this research was conducted to determine the
magnitude of erosion that occurred, erosion hazard levels as well as the spread of
erosion hazard index displayed in the form of a map of the distribution by using
software arcview 3.3. The research was carried out in July-October 2014.
Research method was purposive sampling to determine the point of deliberately
sampling a map overlay results two land units map the map slope slopes and land
use maps. Erosion prediction method using USLE (Universal Soil Loss Equation)
with parameters of observation rainfall erosivity (R), soil erodibility (K), slope
length and slope tilt (LS), crop factors (C) and conservation activity (P), bulk
density (BV) and soil solum thickness. The results showed the level of erosion
hazards are divided into three classes, 59% of the territory of the village of
Kepuharjo including very light, 25% including medium and 16% including
weight. While the spread of erosion hazard index are divided into four classes,
60% of the region including low, 20% of the medium, 10% of the region is high,
and 10% of the region is very high. Slope, vegetation and conservation measures,
is the most influential factor of the amount of erosion that occurred.
Keywords: Erosion hazard level, Erosion hazard index, USLE
Desa Kepuharjo terletak ± 10 km dari puncak Gunung Merapi dengan mayoritas
tanah muda yang berasal dari material hasil erupsi Gunung Merapi. Tanah baru
tersebut belum memiliki agregat yang kuat karena kandungan lempung serta
bahan organik rendah yang membuat kurangnya daya ikat antar partikel sehingga
mudah tererosi. Kondisi topografi yang landai hingga curam serta faktor vegetasi
sekitar yang terganggu akibat erupsi yang terjadi di Desa Kepuharjo karena berada
dalam Kawasan Rawan Bencana (KRB) erupsi Gunung Merapi menyebabkan
kepekaan tanah terhadap erosi yang dapat terjadi menjadi lebih besar. Atas dasar
pemikiran tersebut penelitian ini dilakukan untuk mengetahui besarnya erosi yang
terjadi, tingkat bahaya erosi (TBE) serta sebaran indeks bahaya erosi (IBE) yang
ditampilkan dalam bentuk peta sebaran dengan menggunakan software arcview
3.3. Penelitian dilakukan pada bulan Juli-oktober 2014. Metode penelitian adalah
purposive sampling dengan menentukan titik pengambilan sampel secara sengaja
dari peta satuan lahan hasil overlay dua peta yaitu peta kemiringan lereng dan peta
penggunaan lahan. Prediksi Erosi menggunakan metode USLE (Universal Soil
Loss Equation) dengan parameter pengamatan erosivitas hujan (R), erodibilitas
(K), faktor panjang dan kemiringan lereng (LS), faktor pertanaman (C) serta
tindakan konservasi (P), berat volume tanah (BV) serta tebal solum tanah. Hasil
penelitian menunjukkan tingkat bahaya erosi terbagi dalam tiga kelas, 59%
wilayah Desa Kepuharjo termasuk sangat ringan , 25% termasuk sedang dan 16%
termasuk berat. Sedangkan sebaran indeks bahaya erosi terbagi dalam empat
kelas, 60% wilayah termasuk rendah, 20% wilayah sedang, 10% wilayah tinggi,
dan 10% wilayah sangat tinggi. Faktor kemiringan, vegetasi serta tindakan
konservasi merupakan faktor yang paling berpengaruh terhadap besarnya erosi
yang terjadi.
Kata Kunci : IBE, TBE, USLE
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | S Agriculture > S Agriculture (General) |
| Divisions: | x. Faculty of Medicine, Health and Life Sciences > School of Biological Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 17 Jun 2016 03:25 |
| Last Modified: | 17 Jun 2016 03:25 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/3912 |
Actions (login required)
 |
View Item |