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All Journal Indonesian Journal of Geography Jurnal Ilmu Pertanian Geo Media: Majalah Ilmiah dan Informasi Kegeografian Bioma : Berkala Ilmiah Biologi Jurnal Ilmu Lingkungan Media Komunikasi Geografi Jurnal Teknosains Majalah Geografi Indonesia Forum Geografi The Indonesian Journal of Planning and Development INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi Jurnal Matematika Sains dan Teknologi J SIG (Jurnal Sains Informasi Geografi) jurnal Ilmu Pertanian (Agricultural Science) Jurnal Penelitian Geografi (JPG) PREVENIRE: Journal of Multidisciplinary Science Jurnal Ilmu Kehutanan

Emilya Nurjani

Faculty Of Geography, Universitas Gadjah Mada, Bulaksumur 55281 Indonesia

Author-ID : 2634471

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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USING REMOTE SENSING MULTI-TEMPORAL IMAGE TO ANALYSE THE LAND USE CHANGES AND ITS IMPACT ON THE PEAK DISCHARGE IN GARANG WATERSHED CENTRAL JAVA Cahyadi, Ahmad; Nugraha, Henky; Nurjani, Emilya; Yananto, Ardila; Wijaya, Muhammad Sufwandika
Jurnal Matematika Sains dan Teknologi Vol 13 No 2 (2012)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Perubahan penggunaan lahan di Kota Semarang akibat pertumbuhan penduduk dan aktivitas ekonomi telah menyebabkan terjadinya urban sprawl. Banjir rob, land subsidence, intrusi air laut dan tercemarnya air tanah di Kota Semarang Bagian Utara menyebabkan terjadinya perkembangan Kota Semarang dominan ke arah selatan. Hal ini menyebabkan perubahan penggunaan lahan dari lahan non terbangun menjadi lahan terbangun sehingga jumlah air hujan yang langsung menjadi limpasan akan semakin banyak. Hal ini akan menyebabkan bahaya banjir bandang di Kota Semarang semakin besar. Penelitian ini bertujuan untuk: (1) mengetahui perubahan lahan yang terjadi di DAS Garang selama tahun 1994 dan 2001, dan (2) mengetahui dampak perubahan penggunaan lahan terhadap besarnya debit puncak yang terjadi di DAS Garang. Data yang digunakan dalam penelitian ini adalah Citra Landsat TM tahun 1994, Citra Landsat ETM tahun 2001, dan Citra Alos AVNIR 2008, peta tanah DAS Garang, peta kemiringan lereng DAS Garang, peta jaringan sungai DAS Garang, dan data curah hujan harian Stasiun Ungaran tahun 1952 sampai dengan tahun 2009. Ditemukan bahwa luas lahan terbangun bertambah lebih dari dua kali lipat dari tahun 2001 sampai dengan 2008, lahan pertanian meningkat hampir 50% dan luas hutan mengalami penurunan dari tahun ke tahun. Namun demikian, debit puncak di DAS Garang tidak bertambah secara ekstrem meskipun mengalami sedikit perubahan. Change due to land use in the city of Semarang as an impact of population growth and economic activity has led to urban sprawl. Rob flooding, land subsidence, seawater intrusion and contamination of ground water in the northern part of Semarang lead to the development of the southern part. Consequently, this leads to changes in land use so that the amount of rain water runoff will increase. This may cause the danger of flash floods in the greater city of Semarang. This study were aimed to: (1) determine the changes that occur in the Garang watershed lands during 1994 and 2001, and (2) determine the impact of land use changes on the size of the peak discharge occurring in the Garang watershed. The data used in this study were the 1994 Landsat TM, Landsat ETM 2001, and Citra Alos AVNIR 2008, Garang watershed soil map, slope map of Garang watershed stream network, and daily rainfall data at Ungaran Station of 1952 until 2009. It was found that developed land has been increasing more than doubled from 2001 to 2008, agricultural land increased by nearly 50% and the forest area were decreased from year to year. However, the peak discharge at the Garang watershed has not increased to the extreme though there was a slight change.  

Speleoclimate Monitoring to Assess Cave Tourism Capacity in Gelatik Cave, Gunungsewu Geopark, Indonesia Danardono, Danardono; Putra, Eko Bayu Dharma; Haryono, Eko; Nurjani, Emilya; Sunariya, Muhammad Iqbal Taufiqurahman
Forum Geografi Vol 32, No 2 (2018): December 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v32i2.6958

Increased of the number of visitor at Gelatik Cave is a challenge in terms of cave management. In natural conditions, Caves are vulnerable with environmental changes especially microclimates condition. The change of microclimate inside the cave can destruct cave ornaments.Therefore, it is necessary to calculate the cave carrying capacity with microclimates as the main parameter. This research aims to (1) explore the daily variation of speleoclimate in Gelatik Cave Tourism and (2) analyze the cave tourism capacity in Gelatik Cave. Microclimate parameter that was measured in this research was temperature, relative humidity, and carbon dioxide inside the cave. Measurement of microlimate parameter was carried out automatically for 24 hours during peak season in December 2017 and low season in May 2018. Cave tourism capacity was measured using Lobo method (Lobo, 2015). The results showed that temperature, relative humidity, and carbon dioxide in the Gelatik Cave varry due to tourism activities. The most sensitive parameter is the carbon dioxide concentration inside the cave. The maximum of tourists allowed to visit Gelatik Cave is 76 visitors/ day during holidays and working days. Meanwhile, the maximum time of stay accepted for a particular area inside Gelatik Cave is 17 minutes 10 seconds during weekdays and 12 minutes 53 seconds during the holiday season.

ANALISIS PROBABLE MAXIMUM PRECIPITATION (PMP) DAERAH ALIRAN SUNGAI OPAK MENGGUNAKAN GENERALISED SHORT-DURATION METHOD (GSDM) Sri Lestariningsih; Emilya Nurjani
Majalah Geografi Indonesia Vol 22, No 2 (2008): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

ABSTRAK Penelitian ini dilakukan di DAS Opak di Daerah Istimewa Yogyakarta. Kemungkinan Maksimum Pengendapan (PMP) nilai dapat digunakan sebagai masukan pada menentukan nilai Kemungkinan Maksimum Banjir (PMF) di DAS. Bahwa nilai PMF digunakan untuk pencegahan banjir dan perencanaan struktur hidrologi. Penelitian ini dibuat untuk tahu nilai PMP di DAS Opak. Lain untuk mengetahui distribusi spasial dan temporal dari PMP value.Estimation nilai PMP di DAS Opak dibuat menggunakan Generalized Metode Short-Durasi (GSDM) untuk wilayah DAS hingga 1000 km2 dan durasi pendek. GSDM dianggap faktor medan, penyesuaian untuk kelembaban, dan Penyesuaian untuk elevasi DAS estimasi dari PMP. Dari GSDM bisa tahu spasial distribusi dan temporal PMP value.This nilai hasil studi PMP di DAS Opak adalah 121 mm untuk durasi 3 jam, 68 mm untuk durasi 2 jam, 36 mm untuk durasi 1 jam. Spasial distribusi nilai PMP di DAS Opak sebagai aturan umum memiliki pola yang sama untuk setiap durasi adalah PMP terbesar di pusat elips. Hasil yang didapat, harapan dapat digunakan untuk pertimbangan dalam perencanaan untuk berbagai tujuan. ABSTRACT This study made at the watershed Opak at Daerah Istimewa Yogyakarta. Probable Maximum Precipitation (PMP) value can use as input at determine value of Probable Maximum Flood (PMF) in watershed. That PMF value used for flood prevention and hydrology structure planning. This study made for know PMP value at the watershed Opak. Else for know spatial and temporal distribution of PMP value.Estimation PMP value at the watershed Opak made using Generalized Short-Duration Method (GSDM) for watershed area up to 1000 km2 and short duration. GSDM considered factor of terrain, adjustment for moisture, and Adjustment for watershed elevation on estimation of PMP. From GSDM can know distribution spatial and temporal of PMP value.This study results PMP value at watershed Opak is 121 mm for duration 3 hour, 68 mm for duration 2 hour, 36 mm for duration 1 hour. Distribution spatial of PMP value at watershed Opak as a general rule have same pattern for each duration is PMP greatest at center ellipse. Result gotten, hope can used for consideration in planning for variety of purpose.

APLIKASI SISTEM INFORMASI GEOGRAFIS UNTUK ANALISIS KESESUAIAN LAHAN PERTANIAN DI PROPINSI DAERAH ISTIMEWA YOGYAKARTA Bowo Susilo; Emilya Nurjani; Rika Harini
Majalah Geografi Indonesia Vol 22, No 2 (2008): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

ABSTRAK Sektor pertanian merupakan sektor perekonomian yang masih menjadi unggulan di berbagai wilayah di Indonesia, menempatkan sektor ini sebagai aktivitas utama ekonomi masyarakat dan juga sumber penguatan perekonomian rakyat. Penelitian ini mempunyai tujuan jangka panjang yaitu untuk mengembangkan model integrasi antar faktor fisik dan sosial ekonomi dalam menentukan prioritas arahan pengembangan di sektor pertanian, terutama untuk menentukan jenis komoditas yang paling sesuai pada suatu satuan lahan atau wilayah tertentu yang menjadi daerah basis pertanian. Selain itu juga mengukur keunggulan komparatif dan keunggulan kompetitif daerah basis pertanian DIY ditinjau dari sub sektor tanaman pangan. Hasil penelitian menunjukkan bahwa lahan di Provinsi DIY yang sangat sesuai untuk tanaman padi sebesar 25,4%, sedangkan untuk tanaman kacang tanah lebih kecil lagi yaitu 16% dan untuk tanaman jagung hanya 2%. Faktor yang membatasi tingkat kesesuaian lahan pada 3 jenis tamanan pangan tersebut adalah kondisi perakaran tanaman, ketersediaan unsur hara, retensi hara dan medan atau lokasi. Lahan yang mampu diusahakan untuk aktivitas pertanian dan sesuai dengan kesesuaian lahan untuk tanaman pangan adalah di Ledok Wonosari, Lereng Tengah Merapi, Lereng Bawah Merapi dan Batur Agung. ABSTRACT The agricultural sector is a sector of the economy is still seeded in various regions in Indonesia, putting this sector as the main economic activity of society and also the source of strengthening the economy of the people. This research has a long-term goal is to develop a model of integration between the physical and socio-economic factors in determining the priority direction of development in the agricultural sector, especially to determine the most appropriate types of commodities on a unit of land or a particular region of the local agricultural base. It also measures the comparative advantage and competitive advantage DIY agricultural base area in terms of food crops sub-sector. The results showed that the land in the province that is very suitable for rice crop amounted to 25.4%, while for peanut plants smaller is 16% and for the corn crop is only 2%. Factors that limit the suitability of land on three types of plants are food crop rooting conditions, availability of nutrients, nutrient retention and the terrain or location. Capable of cultivated land for agricultural activities and in accordance with the suitability of land for food crops is in Ledok Wonosari, Central Slopes of Merapi, Merapi Slope Down and BaturAgung.

Geographic Information Systems Application to Drought Distribution Identification with Standardized Precipitation Index (SPI) Method in Trenggalek Regency Aditya Utama; Mohammad Pramono Hadi; Emilya Nurjani
INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi Vol 5 No 2 (2021): August 2021
Publisher : Universitas Nusantara PGRI Kediri

The widespread drought area in Trenggalek Regency in 2019 needs to be analyzed to reduce negative impacts and as a monitoring tool to anticipate future drought events. The Standardized Precipitation Index (SPI) is a drought analysis method by calculating the rainwater deficit at various time scales used to identify the distribution of drought in Trenggalek Regency. This study using rain data on 13 rain stations for the period 1990-2019 and agricultural production data for 2019. The calculation results show that the highest SPI value occurred in March at the highly wet level with a value of 2.11. The lowest SPI value occurred in May at the extremely dry level with a value of -2.31. The results are then mapped using ArcGIS with the Inverse Distance Weighted (IDW) method to identify the spatial distribution of drought.

USING REMOTE SENSING MULTI-TEMPORAL IMAGE TO ANALYSE THE LAND USE CHANGES AND ITS IMPACT ON THE PEAK DISCHARGE IN GARANG WATERSHED CENTRAL JAVA Ahmad Cahyadi; Henky Nugraha; Emilya Nurjani; Ardila Yananto; Muhammad Sufwandika Wijaya
Jurnal Matematika Sains dan Teknologi Vol. 13 No. 2 (2012)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Perubahan penggunaan lahan di Kota Semarang akibat pertumbuhan penduduk dan aktivitas ekonomi telah menyebabkan terjadinya urban sprawl. Banjir rob, land subsidence, intrusi air laut dan tercemarnya air tanah di Kota Semarang Bagian Utara menyebabkan terjadinya perkembangan Kota Semarang dominan ke arah selatan. Hal ini menyebabkan perubahan penggunaan lahan dari lahan non terbangun menjadi lahan terbangun sehingga jumlah air hujan yang langsung menjadi limpasan akan semakin banyak. Hal ini akan menyebabkan bahaya banjir bandang di Kota Semarang semakin besar. Penelitian ini bertujuan untuk: (1) mengetahui perubahan lahan yang terjadi di DAS Garang selama tahun 1994 dan 2001, dan (2) mengetahui dampak perubahan penggunaan lahan terhadap besarnya debit puncak yang terjadi di DAS Garang. Data yang digunakan dalam penelitian ini adalah Citra Landsat TM tahun 1994, Citra Landsat ETM tahun 2001, dan Citra Alos AVNIR 2008, peta tanah DAS Garang, peta kemiringan lereng DAS Garang, peta jaringan sungai DAS Garang, dan data curah hujan harian Stasiun Ungaran tahun 1952 sampai dengan tahun 2009. Ditemukan bahwa luas lahan terbangun bertambah lebih dari dua kali lipat dari tahun 2001 sampai dengan 2008, lahan pertanian meningkat hampir 50% dan luas hutan mengalami penurunan dari tahun ke tahun. Namun demikian, debit puncak di DAS Garang tidak bertambah secara ekstrem meskipun mengalami sedikit perubahan. Change due to land use in the city of Semarang as an impact of population growth and economic activity has led to urban sprawl. Rob flooding, land subsidence, seawater intrusion and contamination of ground water in the northern part of Semarang lead to the development of the southern part. Consequently, this leads to changes in land use so that the amount of rain water runoff will increase. This may cause the danger of flash floods in the greater city of Semarang. This study were aimed to: (1) determine the changes that occur in the Garang watershed lands during 1994 and 2001, and (2) determine the impact of land use changes on the size of the peak discharge occurring in the Garang watershed. The data used in this study were the 1994 Landsat TM, Landsat ETM 2001, and Citra Alos AVNIR 2008, Garang watershed soil map, slope map of Garang watershed stream network, and daily rainfall data at Ungaran Station of 1952 until 2009. It was found that developed land has been increasing more than doubled from 2001 to 2008, agricultural land increased by nearly 50% and the forest area were decreased from year to year. However, the peak discharge at the Garang watershed has not increased to the extreme though there was a slight change.

Geographic Information System-Based Spatial Analysis of Agricultural Land Suitability in Yogyakarta Harini Rika; Bowo Susilo; Emilya Nurjani
Indonesian Journal of Geography Vol 47, No 2 (2015): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Agricultural sector is the main economic activity of the society and also the source of people economy strengthening. The purpose of this study was to determine the priority direction of the development of the agricultural sector, mainly to determine the most appropriate types of commodities for each land unit that serve as local agricultural base. AHP method was integrated with GIS technique to analyze as well as to create land suitability maps for food crops. The results showed that 25.4 percent of lands in Yogyakarta is highly suitable for rice, while only 16 and 2 percent, respectively, is suitable for groundnut and corn. The limiting factors to the land suitability for these three commodities were plant roots condition, nutrients availability, nutrient retention, and soil condition. Suitable lands for rice, groundnut and corn were distributed at Ledok Wonosari, Middle Slope of Merapi, Lower Slope of Merapi and Batur Agung

Participatory implementation within climate change related policies in urbanized area of Indonesia Utia Suarma; Dyah Rahmawati Hizbaron; Sudibyakto Sudibyakto; Emilya Nurjani
Indonesian Journal of Geography Vol 50, No 2 (2018): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Geographically, Indonesia has been subjected towards various climate change related phenomena. This research aim at evaluation of participatory implementation towards climate change related policy which has been set in Indonesia. The research method derived from qualitative framework developed by UNESCO. The research took RAN-API or National Action Plan upon Climate Change Adaptation which has been established since 2013. The document has been integrated within National Medium Term Plan launched at 2015 up to 2019. The research revealed that participation has been inclusive to many stakeholder involved within climate change adaptation program. Furthermore, encouragement needs to be carried out at all level especially in urbanized area. Local to national government has pivotal role to introduce many activities engaged to climate change adaptation. At different array, the research also revealed that many participation has been initiated independently by non-government organization as well as local stakeholder which need to be documented in order to ensure its merits.

Simulation of Daily Rainfall Data using Articulated Weather Generator Model for Seasonal Prediction of ENSO-Affected Zones in Indonesia Andung Bayu Sekaranom; Emilya Nurjani; Rika Harini; Andi Syahid Muttaqin
Indonesian Journal of Geography Vol 52, No 2 (2020): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.50862

Synthetic rainfall simulation using weather generator models is commonly used as a substitute at locations with incomplete or short rainfall data. It incorporates a method that can be developed into forecasts of future rainfall. This study was designed to modify a rainfall prediction system based on the principles of weather generator models and to test the validity of the modelling results. It processed the data collected from eight rain stations in zones affected by El-Nino Southern Oscillation (ENSO). A large-scale predictor, that is, SST prediction data in the Nino 3.4 region over the Pacific Ocean was used as the influencing variable in projecting rainfall for the following six months after the predefined dates. Rainfall data from weather stations and SST in 1960-2000 were analyzed to identify the effects of ENSO and build a statistical model based on the regression function. Meanwhile, the model was validated using the data from 2001 to 2007 by backtesting six months in a row. The analysis results showed that the model could simulate both low rainfall in the dry season and high one in the rainy season. Validation by the student's t-test confirmed that the six-month synthetic rain data at nearly all observed stations was homogenous. For this reason, the developed model can be potentially used as one of the season prediction systems.

Frost Hazard Assessment on Agricultural Land to Achieve Resilient Agriculture in Dieng Volcanic Highland, Central Java Aditya Pradana; Aida Mardiana; Fathimah Nur Lestari; Futuha Helen Sara; Sani Afifah; Emilya Nurjani
Jurnal Ilmu Pertanian Vol 3, No 1 (2018): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Dieng Volcanic Highland is one of the most intensive potato agricultural land in Indonesia, as well as frost disaster prone area. Frost indicated by appearance of frozen dew on the ground or vegetation surface due to cold temperatures during dry season. Frost causes damage to leaf tissue in potato plants, resulting crop failure and losses of up to tens of millions. Disaster management needs to be assess in order to achieve Disaster Risk Reduction (DRR) on agricultural land. This research aims to identify frost hazard areas based on local physical characteristics, analyze frost impacts on agricultural land, and provide preparedness recommendation to reduce the impact of frost disasters in Dieng Volcanic Highland. Research was conducted in Dieng Village, Wonosobo and Dieng Kulon Village, Banjarnegara. Method to assess hazard level was performed by spatial mapping technology using ArcGIS and comprehensive analysis using frost assessment through combinations of geomorphology, land use, proximity to water bodies and weather aspects. Dieng Volcanic Highland has a 125.59 hectare frost hazard areas, as many as 58.4 hectares of hazard areas are dominated by high level, while 24.84 hectares are moderate level and 42.95 hectares are low level. Cropland dominated by potato commodity has the highest hazard level, frost incident causing agricultural commodities to wither to death so that farmers experience losses. Frost losses in Dieng have a range from 800 thousand rupiah to over 155 million rupiah and only destructive on potato farm. In order to encourage agricultural resilience and reduce the loss of frost disasters, effort of preparedness can be done by passively and actively methods. Passive methods includes site selection, early warning system, shifting commodities, cropland modification, and appropriate calendar planting. Active methods includes frost modification using heaters, blower and sprinkle irrigation, and cropland covering using mulch, plastic or nets.

Co-Authors Adhelia Widha Alfareta Aditya Pradana Aditya Utama Agus Suprihatin Utomo Ahmad Cahyadi Ahmad Cahyadi **) Aida Mardiana Andi Syahid Muttaqin Andung Bayu Sekaranom Andung Bayu Sekaranom Andung Bayu Sekaranom Andung Bayu Sekaranom Anindya Hias Bestari Aniworo Nuladani Ardila Yananto Arum Rahayu Bowo Susilo Bowo Susilo Danardono Danardono Danardono, Danardono Dyah Rahmawati Hizbaron Eko Bayu Dharma Putra Eko Haryono Eko Haryono Fathimah Nur Lestari Febriyan Rachmawati Fiel Unggul Prastyo Firmansyah, Anugrah Jorgi Fitria Nucifera Futuha Helen Sara Habibah Nurrohmah Harini Rika Henky Nugraha Henky Nugraha, Henky Ilham Diki Pratama Iswari Nur Hidayati M Iqbal Taufiqurrahman Sunariya Mohammad Pramono Hadi Mohammad Pramono Hadi Muhammad Sufwandika Wijaya Muhammad Sufwandika Wijaya Naashiruddin Fikri Qushoyyi Nanda Fuji Lestari Pertiwi, Serly Andini Putra, Eko Bayu Dharma Rahmatika, Iklila Rika Harini Rika Harini Ryan Andri Wijaya Safira Bitanisa Adnia Amanitya Sani Afifah Sekar Gading Hermawan Sri Lestariningsih Sri Rum Giyarsih Sri Rum Giyarsih Sudibyakto Sudibyakto Sudibyakto Sudibyakto Suharyadi, R Sutriani SUWARNO HADISUSANTO Utia Suarma Wahyu Widiyatmoko Widiyana Riasasi Zunnikah, Zunnikah

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