Specific Peak Discharge of Two Catchments Covered by Teak Forest with Different Area Percentages

Basuki, Tyas Mutiara; Adi, Rahardyan Nugroho; Wijaya, Wahyu Wisnu

doi:10.23917/forgeo.v31i1.3236

Akses terbuka Jurnal SINTA 1

Specific Peak Discharge of Two Catchments Covered by Teak Forest with Different Area Percentages

Forum Geografi · Vol. 31 No. 1 (2017) · hlm. 118–127

DOI: 10.23917/forgeo.v31i1.3236
ISSN: 2460-3945, 0852-0682
Terbit: 2017-07-01
Penerbit: Universitas Muhammadiyah Surakarta
Bahasa: eng
Lisensi: creativecommons.org/licenses/by-nc-nd/4.0

Abstrak

In watershed area, forest has important roles in relation with peak discharge. This research was conducted to study the impacts of teak forest on peak discharge. On-screen digitizing of IKONOS imagery was done to classify the land cover of the study area. Kejalen and Gagakan catchments covered by old teak forests by 74% and 53% respectively, were chosen as the study area. These catchments are located in Blora Regency. Automatic streamflow recorder was set at the outlet of each catchment and subsequently, peak discharges were examined from the recorded data. During the observation, there were 36 evidences of specific peak discharge. The results showed that a trend of lower peak discharges occurred in Kejalen catchment which has the higher percentage of teak forest area in compared to Gagakan catchment with lower percentage of teak forest area, except when extreme rainfalls happened. At rainfall of 163 mm/day, specific peak discharge in Kejalen was higher than in Gagakan catchment. Although there is a relationship between specific peak discharge and the percentage of forest cover area, the increase of specific peak discharge is not only affected by forest cover, but also affected by daily rainfall, antecedent soil moisture, and rainfall intensity. Coefficients of determination between specific peak discharge and daily rainfall are 0.64 and 0.61 for Kejalen and Gagakan catchments, respectively.

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Watershed
National Research and Innovation Agency
Indonesian National Institute of Aeronautics and Space

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Rekan penulis	Organisasi	Artikel bersama
Irfan Budi Pramono	Watershed	8
Diah Auliyani	Watershed	6
Esa Bagus Nugrahanto	Watershed	5
Nining Wahyuningrum	Watershed	2
Galdita Aruba Chulafak	Indonesian National Institute of Aeronautics and Space	1
Fajar Setiawan	National Research and Innovation Agency	1
Budi Heru Santosa	National Research and Innovation Agency	1
Aldiano Rahmadya	National Research and Innovation Agency	1
Firda Maftukhakh Hilmya Nada	National Research and Innovation Agency	1

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Metadata asli (oai_dc)

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	<dc:title xml:lang="en-US">Specific Peak Discharge of Two Catchments Covered by Teak Forest with Different Area Percentages</dc:title>
	<dc:creator>Basuki, Tyas Mutiara</dc:creator>
	<dc:creator>Adi, Rahardyan Nugroho</dc:creator>
	<dc:creator>Wijaya, Wahyu Wisnu</dc:creator>
	<dc:subject xml:lang="en-US"></dc:subject>
	<dc:subject xml:lang="en-US">Peak discharge; catchment; teak forest</dc:subject>
	<dc:subject xml:lang="en-US"></dc:subject>
	<dc:description xml:lang="en-US">In watershed area, forest has important roles in relation with peak discharge. This  research was conducted to study the impacts of teak forest on peak discharge. On-screen digitizing of IKONOS imagery was done to classify the land cover of the study area. Kejalen and Gagakan catchments covered by old teak forests by 74% and 53% respectively, were chosen as the study area. These catchments are located in Blora Regency. Automatic streamflow recorder was set at the outlet of each catchment and subsequently, peak discharges were examined from the recorded data. During the observation, there were 36 evidences of specific peak discharge. The results showed that a trend of lower peak discharges occurred in Kejalen catchment which has the higher percentage of teak forest area  in compared to Gagakan catchment with lower percentage of teak forest area, except when extreme rainfalls happened. At rainfall of 163 mm/day, specific peak discharge in Kejalen was higher than in Gagakan catchment. Although there is a relationship between specific peak discharge and the percentage of forest cover area, the increase of specific peak discharge is not only affected by forest cover, but also affected by daily rainfall, antecedent soil moisture, and rainfall intensity. Coefficients of determination between specific peak discharge and daily rainfall are 0.64 and 0.61 for Kejalen and Gagakan catchments, respectively.</dc:description>
	<dc:publisher xml:lang="en-US">Universitas Muhammadiyah Surakarta</dc:publisher>
	<dc:contributor xml:lang="en-US">Funding by Watershed Management Technology Center</dc:contributor>
	<dc:date>2017-07-01</dc:date>
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	<dc:identifier>10.23917/forgeo.v31i1.3236</dc:identifier>
	<dc:source xml:lang="en-US">Forum Geografi; Vol 31, No 1 (2017): July 2017; 118 - 127</dc:source>
	<dc:source>2460-3945</dc:source>
	<dc:source>0852-0682</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journals.ums.ac.id/index.php/fg/article/view/3236/3296</dc:relation>
	<dc:relation>https://journals.ums.ac.id/index.php/fg/article/view/3236/2842</dc:relation>
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	<dc:rights xml:lang="en-US">Copyright (c) 2017 Tyas Mutiara Basuki, Rahardyan Nugroho Adi, Wahyu Wisnu Wijaya</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-nc-nd/4.0</dc:rights>
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