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All Journal Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Jurnal Penelitian Hutan dan Konservasi Alam Forum Geografi
Agus Wuryanta, Agus
Balai Penelitian Teknologi Kehutanan Pengelolaan Daerah Aliran Sungai
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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 1 
Study on Species Diversity and Stand Structure in Meru Betiri National Park Riyanto, Heru Dwi; Wuryanta, Agus
Forum Geografi Vol 29, No 1 (2015): Forum Geografi
Publisher : Forum Geografi

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Abstract

National parks are forest ecosystems that contain biotic and abiotic resources. Biodiversity is the data and information necessary to understand the degree of loss of species diversity and formulate a sustainable alternative of decline in these resources. The research objective is to study the reciprocal relationship between elevation and habitat of a species in an ecosystem. Research conducted at the National Park (TN) Meru Betiri. The results show that there are spatial variabilities of the species diversity based on the elevation in the study area. Elevation is inversely proportional to species diversity index, the higher the elevation, the species diversity index tends to decline, but the index of the importance of endemic species have increased. Group stand structure and species composition is influenced by the level of elevation with their own environment.
PENERAPAN METODE RATIONAL UNTUK ESTIMASI DEBIT PUNCAK PADA BEBERAPA LUAS SUB DAS Pramono, Irfan Budi; Wahyuningrum, Nining; Wuryanta, Agus
Jurnal Penelitian Hutan dan Konservasi Alam Vol 7, No 2 (2010): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

Salah satu indikator kesehatan DAS adalah debit puncak. Debit puncak yang tinggi menggambarkan tingkat kerusakan suatu DAS. Beberapa DAS tidak mempunyai stasiun pengukur hidrologi sehingga data puncak banjir tidak tersedia. Model yang paling sesuai untuk penaksiran debit puncak sebaiknya diujicobakan di beberapa DAS dengan kondisi biofisk yang berbeda. Tujuan dari penelitian ini adalah untuk mendapatkan luas DAS yang paling sesuai dalam penerapan metode Rational.. Metode Rationaladalah metode penaksiran debit puncak. Metode ini dipilih karena paling sederhana dan paling banyak digunakan di beberapa tempat. Namun demikian, metode ini mensyaratkan beberapa kondisi. Jika syaratnya tidak terpenuhi maka hasilnya menjadi kurang akurat. Metode ini mengasumsikan bahwa intensitas hujan jatuh merata dalam seluruh DAS dan waktu mencapai puncak sama dengan waktu konsentrasi. Metode ini telah diterapkan di Sub DAS Tapan, Ngunut I, dan Wuryantoro dengan luasmasing-masing Sub DAS 145 ha, 596 ha, dan 1.792 ha. Hasilnya menunjukkan bahwa dibandingkan dengan hasil pengukuran, debit maksimum hasil prediksi mempunyai penyimpangan sebesar 185%, -4%,dan 645% masing-masing untuk sub DAS Tapan, Ngunut I, dan Wuryantoro. Tingginya deviasi ini disebabkan oleh  hujan yang tidak merata dalam satu DAS. Meskipun sub DAS Ngunut I mempunyai luas596 ha, namun hujannya dapat merata karena daerahnya lebih datar dibandingkan dengan sub DAS Tapan dan Wuryantoro.
Water Storage Index Estimation using Geographic Information System Wuryanta, Agus; Murtiono, Ugro Hari
Forum Geografi Vol 28, No 1 (2014)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

The study aims to estimate water storage index (IPA) of six sub watersheds (Panjang, Rengas, Legi, Galeh, Parat, and Sraten) in the cachment area of Rawapening lake by using Geographic Information System. Water storage index can be calculated from average discharge (m3) devided by water requirement (m3) for each land cover/land use. Landuse information is obtained from Indonesian Topographic Map scale of 1:25.000 as updated by using SPOT image (2006), while surface water availability data was obtained from the ministry of public works. The results indicate that 1) IPA of Panjang Subwatershed was categorized as good condition with an index value of 1,49; 2)IPA of Rengas and Legi sub watersheds were categorized as moderate condition with index value 0,76 and 0,55; 3) IPA of Galeh, Parat, and Sraten sub watersheds was categorized as bad with index value of 0,3, 0,15, and 0,33, this watershed need to be improved especially an effective water resources plan, allocating and distributing of water according to priority establishment.
Radar Data for Identifying the Characteristics of Tropical Forest Stands Wuryanta, Agus
Forum Geografi Vol 30, No 1 (2016): July 2016
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Radar is one of remote sensing technology which utilizes active electromagnetic energy and are able to provide information about the characteristics of forest stand. This study utilized JERS-1 and ERS-1 radar images to analyze the relationship between the radar backscatter and forest stand characteristics such as Diameter Breast Height (DBH), basal area, and canopy cover. This research was conducted in Jambi Province, Bungo Tebo District, Sumatra, Indonesia. The research site covered the forest concession, Suku Anak Dalam, the area adjacent to Pelepat and Batang Tebo River, and Kuamang Kuning village. Gamma Map Filter with 7 x 7 window size was applied to reduce speckle noise of the SAR images (ERS-1 and JERS-1). This study found out the positive significant correlation between basal area and DBH with JERS-1 radar backscatter (i.e., r = 0.75 and r = 0.70), while ERS-1 radar backscatter has correlation (r = 0.64) with the canopy cover.
Water Storage Index Estimation using Geographic Information System Wuryanta, Agus; Murtiono, Ugro Hari
Forum Geografi Vol 28, No 1 (2014): July 2014
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v28i1.438

Abstract

The study aims to estimate water storage index (IPA) of six sub watersheds (Panjang, Rengas, Legi, Galeh, Parat, and Sraten) in the cachment area of Rawapening lake by using Geographic Information System. Water storage index can be calculated from average discharge (m3) devided by water requirement (m3) for each land cover/land use. Landuse information is obtained from Indonesian Topographic Map scale of 1:25.000 as updated by using SPOT image (2006), while surface water availability data was obtained from the ministry of public works. The results indicate that 1) IPA of Panjang Subwatershed was categorized as good condition with an index value of 1,49; 2)IPA of Rengas and Legi sub watersheds were categorized as moderate condition with index value 0,76 and 0,55; 3) IPA of Galeh, Parat, and Sraten sub watersheds was categorized as bad with index value of 0,3, 0,15, and 0,33, this watershed need to be improved especially an effective water resources plan, allocating and distributing of water according to priority establishment.
Radar Data for Identifying the Characteristics of Tropical Forest Stands Wuryanta, Agus
Forum Geografi Vol 30, No 1 (2016): July 2016
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v30i1.1501

Abstract

Radar is one of remote sensing technology which utilizes active electromagnetic energy and are able to provide information about the characteristics of forest stand. This study utilized JERS-1 and ERS-1 radar images to analyze the relationship between the radar backscatter and forest stand characteristics such as Diameter Breast Height (DBH), basal area, and canopy cover. This research was conducted in Jambi Province, Bungo Tebo District, Sumatra, Indonesia. The research site covered the forest concession, Suku Anak Dalam, the area adjacent to Pelepat and Batang Tebo River, and Kuamang Kuning village. Gamma Map Filter with 7 x 7 window size was applied to reduce speckle noise of the SAR images (ERS-1 and JERS-1). This study found out the positive significant correlation between basal area and DBH with JERS-1 radar backscatter (i.e., r = 0.75 and r = 0.70), while ERS-1 radar backscatter has correlation (r = 0.64) with the canopy cover.
Study on Species Diversity and Stand Structure in Meru Betiri National Park Riyanto, Heru Dwi; Wuryanta, Agus
Forum Geografi Vol 29, No 1 (2015): July 2015
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v29i1.791

Abstract

National parks are forest ecosystems that contain biotic and abiotic resources. Biodiversity is the data and information necessary to understand the degree of loss of species diversity and formulate a sustainable alternative of decline in these resources. The research objective is to study the reciprocal relationship between elevation and habitat of a species in an ecosystem. Research conducted at the National Park (TN) Meru Betiri. The results show that there are spatial variabilities of the species diversity based on the elevation in the study area. Elevation is inversely proportional to species diversity index, the higher the elevation, the species diversity index tends to decline, but the index of the importance of endemic species have increased. Group stand structure and species composition is influenced by the level of elevation with their own environment.
EUTROPHICATION AND SOLVING EFFORT IN LAKE RAWAPENING, SEMARANG DISTRICT CENTRAL JAVA (A Spasial Approach) Wuryanta, Agus; Murtiono, Ugro Hari
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 15, No 1 (2018): January 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v15i1.15270

Abstract

Lake Rawapening in Semarang regency is one of the priority lakes to be addressed related to eutrophication  issues. High concentration of Nitrogen (N) and Phospor (P) in the water that cause eutrophication of the lake has fueled the high growth of the water hyacinth. The nutrients can come from agricultural land such as irrigated rice field, rainfed and vegetable farms. Objectives of this study were to determine the total amount of nutrients supply from agricultural land on each catchment area of the lake and provide alternative solutions to reduce nutrients concentration. Information of agricultural land can be obtained from Indonesia Topographic Map (RBI) scale of 1:25.000 and updated with SPOT-2 image recorded in July 5, 2006. Surface water samples were taken during the dry and rainy season from agricultural land as much as 3 samples for each agriculture land types, therefore 18 samples were collected. The result shows, Ringin Sub-watershed has the most extensive irrigated rice field (662.94 ha). While, Panjang Sub- watershed has the most extensive of rainfed  (988.49 ha) and vegetable farms (643.74 ha). The agriculture land in the catchment area has supplied N and P nutrients of 2.181,71 tons and 420,04 tons to water of the lake, annually. Panjang river has supplied the highest N and P nutrients, ie 769,025 ton and 105,432 ton annually, while Kedung Ringin river has supplied lowest N and P nutrients, ie 19,479 ton and 4,790 ton, annually. Buffer zone around the lake sould be developed necessary to reduce  the nutrients  supply to the lake.
Water Shortage at Several Sub Watershed into Wonogiri DAM Murtiono, Ugro Hari; Wuryanta, Agus
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 16, No 2 (2019): July
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v16i2.20830

Abstract

The study was conducted at several selected sub-watersheds (Temon, Wuryantoro, Alang, and Keduang Sub-watersheds) in Wonogiri District. These four sub-watersheds are main rivers whose outlets flow into Wonogiri Dam. The study calculated the water supply and water demand for various uses at four sub-watersheds. The Thornwaite and Mather method was used to estimate the water supply. The results indicated that: (1) The water supply of Temon Sub-watershed was 35,435,875 m3­­­­­ and the annual water demand was 51,053,247 m3­­­­­, therefore there was a deficit of 30,59 % per year; (2)  The water supply of Wuryantoro Sub-watershed was 17,788,417 m3­­­­­ and the water demand was 22,413,430 m3­­­­­ per year, therefore the deficit was 20.64% per year; (3) The water supply of Alang Sub-watershed  was 31,372,317 m3­­­­­ per year and the water demand was 69,566,500 m3­­­­­ per year, therefore the deficit was 54.90% per year; (4) The water supply of Keduang Sub-watershed was 438,527,889 m3­­­­­ and the water demand was 452,611,219 m3­­­­­ per year, thus, the deficit was 3.11%  per year; (5) those sub-watersheds need improvements especially effective water resources plans, water allocation and distribution based on the determined priority, e.g., retention basin, low evapotranspiration re-vegetation, well-managed infiltration, water resources protection, and water reservoir construction.
Water Shortage at Several Sub Watershed into Wonogiri DAM Murtiono, Ugro Hari; Wuryanta, Agus
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 16, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v16i2.20830

Abstract

The study was conducted at several selected sub-watersheds (Temon, Wuryantoro, Alang, and Keduang Sub-watersheds) in Wonogiri District. These four sub-watersheds are main rivers whose outlets flow into Wonogiri Dam. The study calculated the water supply and water demand for various uses at four sub-watersheds. The Thornwaite and Mather method was used to estimate the water supply. The results indicated that: (1) The water supply of Temon Sub-watershed was 35,435,875 m3­­­­­ and the annual water demand was 51,053,247 m3­­­­­, therefore there was a deficit of 30,59 % per year; (2)  The water supply of Wuryantoro Sub-watershed was 17,788,417 m3­­­­­ and the water demand was 22,413,430 m3­­­­­ per year, therefore the deficit was 20.64% per year; (3) The water supply of Alang Sub-watershed  was 31,372,317 m3­­­­­ per year and the water demand was 69,566,500 m3­­­­­ per year, therefore the deficit was 54.90% per year; (4) The water supply of Keduang Sub-watershed was 438,527,889 m3­­­­­ and the water demand was 452,611,219 m3­­­­­ per year, thus, the deficit was 3.11%  per year; (5) those sub-watersheds need improvements especially effective water resources plans, water allocation and distribution based on the determined priority, e.g., retention basin, low evapotranspiration re-vegetation, well-managed infiltration, water resources protection, and water reservoir construction.
Co-Authors Heru Dwi Riyanto Irfan Budi Pramono Nining Wahyuningrum Ugro Hari Murtiono, Ugro Hari