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INDONESIA
Indonesian Journal of Geography
ISSN : 00249521     EISSN : 23549114     DOI : -
Core Subject : Science,
Indonesian Journal of Geography ISSN 2354-9114 (online), ISSN 0024-9521 (print) is an international journal of Geography published by the Faculty of Geography, Universitas Gadjah Mada in collaboration with The Indonesian Geographers Association. Our scope of publications includes physical geography, human geography, regional planning and development, cartography, remote sensing, and geographic information system. IJG publishes its issues three times a year in April, August, and December.
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Articles 7 Documents
Search results for , issue "Vol 40, No 2 (2008): Indonesian Journal of Geography" : 7 Documents clear
A COMMUNITY-BASED VULNERABILITY ASSESSMENT OF FLOODS IN URBAN AREAS OF KAMPUNG MELAYU, JAKARTA Mone lye CorneliaMarschiavelli; M. Pramono Hadi; Michael K. McCall; Nanette C. Kingma
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2252

Abstract

Flooding has become a serious problem in Jakarta. During floods .of 2007, Kampung Melayu, East Jakarta was the worst hit.by the floods. Community have different perceptions on disaster and have different effort to overcome the hazards. Therefore, local government and relevant institution should investigate this situation and make this information a valuable input in developing and implementing response plans in flood mitigation. This research is to explore the vulnerability of floods based on local people's perception. There were 83 households interviewed using questionnaire. Certain elements at risk related with physical and socio:economic aspects were identified. Physical information concerned the building structure and building contents. Several socio-economic characteristics were used as key indicators to analyze the vulnerability of people. Generally, the result of this research shows that the ability of people to cope with the flooding i$ linked with the capacity of the people itself. The capability of people to deal withflooding was influenced by several indicators.based on their socio- . economic characteristics. For example, lower income people will experience more suffering than the wealthier, because they cannot afford the' costs of repair, reconstruction. Although the wealthier are likely to experience a higher degree of economic damage due to possessions of higher value. Base on the analysis, all coping strategies and flood measures are not enough to cope with flooding in the study area.
ASSESSING THEHYPERSPECTRAL REMOTE SENSING DATA TO DIAGNOSIS CROP VARIABLES MODEL IN TROPICAL IRRIGATED WETLAND RICE Muhamad Evri; Muhamad Sadly; Arief Darmawan
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2253

Abstract

Canopy spectral measureme~t using ground-based hyperspectral r;leviceand rice crop variables such as leaf area index (LAI), leaf dry weight (LDW) andSPAD values were done periodically during growth season with involving threerice cultivars (Pandanwangi, Ciherang and IR Jumbo) ahd four nitrogenapplication levels (NO,N80, N92 and NI03 kg/ha). Thestudy is directed to exploreall possible waveband combinations tested in reflectance of vegetation indices(VIs) and to develop a predictive model of relation between hyperspectral-basedvegetation indiceswith rice crop variables. .Analysis of all possible two-pair waveband combinations used in VIs wasinvestigated with 6,786 combinations to gain optimal waveband attributed to cropvariables. To develop.efficient and accurate model, various multivariate regressionmodels were examined with ten-fold cross validations. Accuracy validation ofpredicted model was performed using reflectance and FDR, NDVI, RVI, RDVI andSA VI data. Validation of predictive model using flJR implied better accuracy toestimate LAI using whole season data (R2=0.856). Meanwhile, the model usingSA VI denoted highest values (R2=0.852)for predicting LAI While the validation ofpredictive model using RVI implied the highest values (K=O. 797) for predictingLDW. Moreover, the test of predictive model using SAVI indicated the highestvalue (R2=0.658) for predicting SPAD values. According to overall validationusing VIs, it seems that RVI has the best accuracy to validate the predictive modelof LAI than those of LDW or SPAD values. Meanwhile, the most significant of K tovalidate the predictive model was obtained on FDR data with R2=0.859for LAl
APPLICATION OF REMOTE SENSING TO ESTIMATE ABOVE GROUND BIOMASS IN TROPICAL FORESTS OF INDONESIA Arief Wijaya; Richard Gloaguen; Hermann Heilmeier
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2254

Abstract

This work aims to estimate Above Ground biomass (AGB) of a tropicalrainforest in East Kalimantan, Indonesia using equation derived from the standvolume prediction and to study the spatial distribution of AGB over aforest area.The potential of remote sensing and field measurement data to predict standvolume and AGB were studied Landsat ElM data were atmospherically correctedusing Dark Object Subtraction (DOS) technique, and topographic corrections wereconducted using C-correction method Stand volume was estimated using field dataand remote sensing data using Levenberg-Marquardt neural networks. Standvolume data was converted into the above ground biomass using available volume- AGB equations. Spatial distribution of the AGB and the error estimate were theninterpolated using kriging. Validated with observation data, the stand volumeestimate showed integration of field measurement and remote sensing data hasbetter prediction than the solitary uses of those data. The AGB estimate showedgood correlations with stand volume, number of stems, and basal area.
THE POTENTIAL OF RAINFALL AND ITS IMPACT TO GROUNDWATER STORAGE IN JAVA ISLAND Setyawan Purnama
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2255

Abstract

The objectives of the study are to map the distribution of rainfall in Java, toanalyze its potential and the impact to groundwater storage. To achieve thosegoals, rainfall distribution is mapped using isohyet method. From the averagedistribution of monthly rainfall, the annual potential of rainwater on everywatershed was calculated. Afterwards, the groundwater storage was analyzed andcounted by applying the water balance concept. The results of the study show thatthe mean of the highest annual rainfall is 4082 mm which occurs on Cisadane-Ciliwung watershed and the lowest one is 1421 mm on Citarum Hilir watershed.From the rainfall potential, Cisadeg-Cikuningan watershed has the highest rainfallpotential at the amount of 25342 million m31month and Grindulu Panggulwatershed has the lowest potential at the amount of 3678 million m3lmonth.Meteorologically, Cisadeg-Cikuningan watershed has the highest groundwaterstorage at the amount of 6088 million m31yearand the lowest amount of it occurson Madura watershed at 78 million m3lyear.
THE ENVIRONMENTAL IMPACT OF NATURE BASED TOURISM IN GUNUNG MERAPI NATIONAL PARK Chafid Fandeli
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2256

Abstract

The goal of this research is to find out some impacts of tourism activities tothe environmental mainly to the biotic and non-biotic components. The researchalso focuses in finding out importance and performance of the products offered-byGunung Merapi National Park to the tourists. This research is done in fourlocations, consisted of the undisturbed location for controlling (Plawangan) andthe disturbed locations caused by the tourists, which are Kalikuning, Tlogonirmoloand Tlogomuncar. The result shows that the impClcts of tourist activities in somelocations show that the number of .microbial in the controlling location-is thehighest (54.56 cfu/gram) compared with others location. The impact to the numberof actin0mycetes in the controlling location is 32.84 cfu/gram, which is the highest.The infiltration rate with the model Horton in the controlling location is higher(0.983 cm/min) than the infiltration rates of the others. The voice frequencydescribes crowd level that at the controlling location has the lowest voicefrequency (10.15 dB). Some kinds of tree destruction as the impact of touristactivities show that the destructions happen mostly in Tlogomuncar, followed withKalikuning and Tlogonirmo 10. The most severe destruction of all locations isvandalism, and then scratch, spike prickling, branch breaking, and waste burning.Ihe importance and .performance of the products of the tourism objects offereddescribe that the attractions and tourism facilities like waterfall, musholla, shelter,dustbin, and observer tower have a considerable perception and goodperformance. However, some other facilities/attractions such as operational office,security center, gate, health clinique and bridge are not very important and not ina good condition.
GEOMORPHOLOGICAL DEVELOPMENT OF THE MURIA PALAEOSTRAIT IN RELATION TO THE MORPHODYNAMICS OF THE WULAN DELTA, CENTRAL JAVA Sunarto Sunarto
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2257

Abstract

The research area is situated in the Demak, Jepara, Pati and Kudusregencies of the CentralJava Province. The objectives of the research are: (1) theinvestigation of the geomorphologic development of the Muria Palaeo-Strait inCentral Java and (2) the analysis of the morphodynamicsof the WulanDelta. Amorphographic- morphogeneticapproach was used to interpret the genesJsandsubsequent evolution of the coastal lowlands in the surroundings of the MuriaVolcano. The data analysis techniques, based on cause-effect assessment andanalogy, were implemented in four steps, such as: (a) descriptive, (b) comparative,.(c) associative and (d) causative stages. The results of the research can besummarized as follows: The coastal plain situated to the south of the MuriaVolcano was originally a shallow strait and subsequently became a mangrovecoveredtidal flat with many creeks. Ultimately this tidal flat evolved into analluvial/coastal plain with natural levees and back swamps. The coastal area in thewest was still inundated by the sea around 6,000 yrs BP. This is evidenced by the14C-dating 6,530 + 120 yrs BP of a coral reef situated at 25 cms a.s.l. The presentbeach ridge has an age 4,600 + 100 yrs BP and originated as a barrier bar. Thecoastal area in the east is characterized by the occurrence of four sequential beachridge complexes at elevations of 580, 520, 220 and 125 cms respectively. Theyhave been 14C-dated 5,860 + 110 yrs BP, 5,090 + 100 yrs BP, 3,530 + 100 yrs BPand 1,760 + 120 yrs BP. Since 1,760 yrs BP nofurther beach ridges wereformed,a tidal flat developed instead. The shape of the Wulan Delta changed from actuateto digit ate in the period of 1925 - 1995, mainly due to human interference with theriver for purposes of irrigation. The growth of the Wulan Delta affected the hydrodynamical situation offshore of Jepara. These hydrodynamic changes resulted inmarine erosion in the rural areas in the Jepara Regency and chewier formation inthe rural areas of the Demak Regency.
CLIMATE S ROLE IN CHANGING THE FACE OF THE EARTH AND THE SPATIAL CONFLICT PROBLEMS: A PRELIMINARY STUDYON THE CIMANUK WATERSHED Djoko Harmantyo
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2258

Abstract

The increasedglobal climate directly affects theface of the earth. In additionto result in shifting of season and extremeweather, the relatively rapid changein temperaturebeing climate element also gives impact on intensity of geomorphologyprocess (weathering, erosion, sedimentation). This paper describes how theescalated climate affects the process 'of weathering and erosion as well as changein delta mainland size and its contribution to the emergence of spatial conflict.DAS Cimanukwas selected as the study case area. The escalated air temperaturefor a long period directly escalates the acceleration of rock weathering, which inturn accelerates the erosion of weathered rock due to rainfall to be sedimentmaterial through erosion process. During period of 1963 - 2002, Cimanuk deltaarea enlarged more than 350.000 m2/year. This new land, which is formed byweathering and erosion processes in the Cimanuk River Basin through peels ofland surfacepredicted to be averagely more then 10 em/year. In the last, the newlandformed by geomorphologic processes triggering the new source of conflictpotentially.

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