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INDONESIA
Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments)
Published by Universitas Indonesia
ISSN : -     EISSN : 25979949     DOI : 10.7454/jglitrop
Core Subject : Science,
Earth & Planetary Sciences
JGLITROP is a scientific journal published by Department of Geography at the University of Indonesia focuses on the application of Geography in tropical environment. The focus of the issues consist of: Physical Geography Human Geography Remote Sensing Geographic Information System Environmental Sciences Multidiscipline/Others
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 70 Documents
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GIS APPLICATION FOR EVALUATION OF TRADE AND SERVICES AREA DEVELOPMENT IN SERANG CITY, BANTEN PROVINCE Aji, Adam Hastara; Rachmita, Nurina; Sari, Nurwita Mustika; Kushardian, Benedictus
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 5, No. 2
Publisher : UI Scholars Hub

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Abstract

Trade and service area is an area that facilitates trade transactions and services between people in need (demand side) and people who sell services (supply-side). In determining trade areas and services, SMCE or Spatial Multi-Criteria Evaluation or spatial evaluation techniques consider many different criteria when making decisions. The method used in this paper is SMCE with Weight Overlay technique using four variables, namely roads, slopes, settlements and rivers. Weighting carried out in the analysis was made with various simulations, namely Simulation A with the same weight weighting on each variable 25%, simulation B with dominant weighting on one of the variables with a composition of 55%:15%:15%:15% and simulation C gave the highest weight to the most influential variables and gave the lowest weight to the variables that were less influential for the Trade and Service Area. In this Simulation, the road network's weight is 30%, settlements are 25%, slopes are 25%, and the rivers are 20%. The total area of 23.5 Km2 or about 8.8% of Serang City area located in the city centre with excellent accessibility, not far from residential areas, a safe distance from the river, and an area with flat marbles.
APPLICATION OF FOREST CANOPY DENSITY (FCD) MODEL FOR THE HOTSPOT MONITORING OF CROWN FIRE IN TEBO, JAMBI PROVINCE Falensky, Muhammad Attorik; Sulti, Anggieani Laras; Putra, Ranggas Dhuha; Marko, Kuswantoro
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 4, No. 1
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Abstract

Indonesia is one of the owners of the 9th largest forest area in the world. Forest area in Indonesia reaches 884,950 km2 . Tebo Regency is a regency in Jambi Province which has a wide forest area of 628,003 Ha. However, this forest area has been reduced due to the conversion of functions of Industrial Plantation Forests (HTI), oil palm plantations, and forest clearing activities for both settlements and plantations which led to the phenomenon of forest and land fires (karhutla). This study aims to get a better knowledge of crowns of fire potential locations in forest areas using remote sensing technology. Remote sensing data used in this study is from the satellite imagery of Landsat 8 OLI - TIRS in 2019. Remote sensing data is used to produce a Forest Canopy Density (FCD) model that can be overlapped with a hotspot location, so the crown fire potential locations will be explored in the forest area of Tebo Regency, Jambi Province. Identification of hotspot patterns in Forest Areas was analyzed using spatial analysis. The results of this study are useful for the government as the information of the hotspot area as the cause of fires in the Forest Region of Tebo Regency Jambi Province.
PEMODELAN KEJADIAN BANJIR DAERAH ALIRAN SUNGAI CILIWUNG HULU DENGAN MENGGUNAKAN DATA RADAR Putiamini, Sepanie; Kusratmoko, Eko; Syamsudin, Fadli
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 1, No. 1
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. This study reports the applicability of hydrological modeling, HEC-HMS, integrated with Geographic Information Systems (GIS) to examine the rainfall - runoff relationship with a case study of Upper Ciliwung watershed. Spatial rainfall data derived from radar data used in the process of simulating rainfall - runoff and the results are compared with simulation results using the observed rainfall data. Analysis of the rainfall-runoff simulation was conducted based on spatial approach by comparing the differences and similarities between sub catchments. The simulations carried out for the flood events in 2002, 2007 and 2013. The results of the simulation of rainfall - runoff using C-Dopller weather rainfall radar data shows the sub-watershed of Ciliwung (Tugu) produced discharge with the highest volume in January - February 2002 and 2007, and also 16 - 17 January 2013, i.e. 117 mm, 124 mm and 46 mm, respectively. Physical characteristics of the watershed such as slope, land use, and soil type, are the factors that determine the high discharge value. The results of validation using RMSE and Nash produces small deviation value of the observation data. It shows that the use of weather radar data is reliable in the rainfall-runoff simulation in the Upper Ciliwung watershed
VARIASI SPASIOTEMPORAL URBAN HEAT ISLAND DI KAWASAN PERKOTAAN YOGJAKARTA TAHUN 2015-2017 Zahro, Haura; Sobirin, Sobirin; Wibowo, Adi
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 2, No. 1
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Abstract

The limitation of Yogyakarta City to meet the demand for impervious land make the development expands to Sleman and Bantul regency so that formed the Urban Area of Yogyakarta. This study aims to determine the pattern of surface temperature, its relationship with the vegetation greenness and the occurrence of the UHI phenomenon in the Urban Area of Yogyakarta in 2015- 2017. The surface temperature was obtained from Landsat 8 OLI / TIRS image processing by the mono-window method and validated by direct air temperature measurement, vegetation greenness with NDVI algorithm and UHI when the surface temperature above 30 ºC. The results show that the farther from the city center the surface temperature drops to 0.93ºC per kilometer. The highest surface temperatures occur in October 2015 and September 2017. The surface temperature has a strong correlation value with vegetation greenness with correlation coefficient up to -0.709 that is the higher the vegetation greenness the lower surface temperature. UHI phenomenon occurs every month with variation 11,85-4,01ºC and the highest surface UHI phenomenon occurs in October 2015with 41,85ºC. In conclusion, the UHI phenomenon occurs every month with the highest temperature and most intensive area of the UHI phenomenon is in October 2015.
VARIABILITAS CURAH HUJAN DI KABUPATEN KEBUMEN Indratmoko, Satria; Harmantyo, Djoko; Kusratmoko, Eko
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 1, No. 1
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Abstract

Rainfall is highly variable climate elements, either in space or time scale. Variation of this rainfall will have an impact on the determination of the start of the planting of rice plants in particular. Through a statistical calculation and mapping of spatial data, this research will reveal a pattern of early growing season in response to rainfall variability in Kebumen Regency over a period of thirty years, i.e. 1981-2010. Spatial analysis with a reinforced approach statistics reveal that the coastal region in Kebumen Regency have a high rainfall variability with an average of rainfall is low. The higher the variability of annual precipitation totals declined, followed by the average rainfall is high. In addition, the beginning of paddy planting season begins in areas with low rainfall variability (the hills) to the region's high rainfall variability (coastal). In the period 1981-2000, paddy planting season begins early from the North and at regular intervals toward the South. On the other hand, in the period 2001-2010 paddy planting season begins early from the Northwest and at regular intervals toward the Southeast.
WILAYAH RAWAN LONGSOR DI KOTA JAYAPURA Abrauw, Rudolf D
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 1, No. 1
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Jayapura City is area that located in the north of the island of Papua and dealing directly with the Pacific Plate, so the potential for geological disasters, one of which is a landslide. However, landslides occur not only influenced by the movement of the Pacific Plate (because of occurrences fault / faults), but also a slope that varies from lowlands (0-8%) to the hills (> 45%), lithological and climatic conditions. This study aims to map areas vulnerable to landslides based Geographic Information System (GIS) using two models, namely, [1] the model prediction of landslides Directorate of Volcanology and Geological Hazard Mitigation (DVMBG) in 2005 with the parameters rainfall, geology, soil type, slope and land use; and [2] a combination of landslide prediction model of the Land Research Center with the parameters slope, rainfall, geology, soil type, distance of fault / faults and density of vegetation. The second result is verified with the data model of landslide occurrence during the period 2002-2014. The results showed that the application of the two models show the differences in the distribution of areas vulnerable to landslides. The first model produces an area prone to landslides with a high classification of 16780 hectares, while the second model recorded only 2184 Ha. Verification results with field data show that the second model is more representative and could be used to identify areas vulnerable to landslides in the city of Jayapura
PENGARUH EMBUNG DAN KOMBINASINYA DENGAN TEKNIK KONSERVASI TANAH DAN AIR LAINNYA TERHADAP KOEFISIEN REGIM ALIRAN DAN KOEFISIEN ALIRAN TAHUNAN Rahman, Latief M; Nursari, Evi; Baskoro, Dwi Putro Tejo
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 2, No. 2
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Abstract

Government of Indonesia planned to build 30.000 embung in 2017. Embung or mini reservoir is one of soil and water conservation methods to decrease surface runoff, enhance water surface retention, and increase water entering to the soil by infiltration, that finally influence the values of Discharge Ratio and Runoff Coefficient of a watershed. This research that was done in 2017 is about the effect of embung and it’s combination with other soil and water conservation technics (strip cropping and agroforestry) on Discharge Ratio (DR) and Runoff Coefficient (RC) in Cilemer Watershed by using SWAT method. The result shows that the Scenario 1 (mini reservoir technic alone) decreased DR and RC by 25.45% (from 119.70 to 94.25) and 32% (from 0.25 to 0.17), respectively. The Scenario 2 (combination of embung and strip cropping) decreased DR and Runoff Coefficient by 40.92% (from 119.70 to 78.78) and 32% (from 0.25 to 0.17), respectively. The Scenario 3 (combination of mini reservoir and agroforestry) decreased DR and RC by 41.38% (from 119.70 to 78.31) and 36% (from 0.25 to 0.16), respectively. The application of mini reservoir and its combination with other soil and water conservation (SWC) techniques were able to decrease DR and RC meaningfully.
KARAKTERISTIK DAN POLA PERSEBARAN DOLINA DI KECAMATAN PONJONG DAN SEMANU, KABUPATEN GUNUNGKIDUL Damayanti, Astrid; Sari, Diah Fitri Novita
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 2, No. 2
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Ponjong and Semanu Districts, Gunungkidul Regency are included in Gunung Sewu Karst mega system which has the variety of morphologies. Karst morphologies were formed as the result of karstification that could have negative impacts, such as doline’s modification impacts land subsidence occurrence. Therefore, the aim of this research is to know the potential of land subsidence by determining characteristics and distribution pattern of doline. Those characteristics of doline are karst terrain, vegetation density, and surface temperature. This research used SRTM data and Landsat 8 to identify those characteristics of doline. Furthermore, using analysis doline’s morphometric and Nearest Neighbour Analysis (NNA) method used to find the distribution pattern of doline. Based on its characteristics, doline is divided into wet and dry. Doline has three different shapes, which are oval, round, and irregular. Those dolines have the group distribution pattern (NNA index 0,843). In Semanu District formed a clustering pattern, indicating further development of karstification of doline when compared with in Ponjong District which still tend to be random. Characteristics of clumped doline are found in lowland terrain forms with medium vegetation densities and high surface temperatures, while random ones have a bumpy terrain field shape with dense vegetation densities and low surface temperatures.
MITIGASI BENCANA BERBASIS KEARIFAN LOKAL DI DESA TIENG, KABUPATEN WONOSOBO Puspitasari, Anisa Eka; Bima, Dion Prabu Septa; Dewi, Titis Puspita
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 2, No. 2
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Disaster is a common thing experienced by people in Indonesia and become its own problem. People who are accustomed to disaster have local knowledge in disaster mitigation. Local knowledge or local wisdom is the result of the adaptation and experience of events that have occurred in the area. This research takes place in Tieng Village, Dieng, Kejajar District, Wonosobo Regency. Tieng Village is an area prone to landslides and has been hit by flash flood on 18 December 2011. The flood disaster caused loss of life and loss of property that is not small. The research method used is descriptive qualitative with structural approach related to collective awareness of society. The purpose of this study is to analyze the mitigation efforts undertaken by local wisdom-based communities in Tieng Village. The result of this study is that people have a common awareness to perform the mitigation that is demonstrated by the habit of going out and going to safer places by bringing securities when there is heavy rain with high intensity more than two hours, once a month working to clean river and plant trees , often held socialization about floods and landslides especially when the rainy season, and people have an understanding that they must be wise to nature
DINAMIKA EROSI TANAH DAN KRISIS EKONOMI-ERA REFORMASI DI DAERAH ALIRAN SUNGAI SERAYU HULU Rustanto, Andry
Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Vol. 3, No. 1
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Abstract

A large-scale horticulture crops practices in addition to land use / land cover changes in the upper Serayu Hulu catchment has been reported as the most responsible factor of the sedimentation acceleration in the downstream hydropower plant reservoir. This acceleration may become a serious problem for the hydropower plant because it would shorten the reservoir lifespan from the initial estimation. The problem could be further worst if the soil conservation practices application is still limited and land use / land cover changes that tend to increase run-off keep on progress. One of such situation in contrast has been occurred during 1997 - 1998 when financial crisis hit the country followed by the succession of the political regime. Due to the above situation, land use / land cover changes in the period expanded into higher elevation and slope. On the other hand, financial crisis has limited the attention of the horticulture crop farmers in applying soil conservation practices. This paper shows that those two factors together with climatic condition have increase the soil detachment in the hillslope before and after the country financial crisis and political regime succession in 1997 – 1998 by more than 100%. However, the soil detachment rate was then decreasing after some years even though still higher than before 1997

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