{"title":"PREDICTION OF THUNDERSTORM OCCURRENCES IN TROPICAL AREAS USING A NUMERICAL MODEL","authors":"W. Suparta, W. S. Putro, T. K. Darmastono","doi":"10.21163/GT_2021.161.07","DOIUrl":"https://doi.org/10.21163/GT_2021.161.07","url":null,"abstract":": The prediction of thunderstorm activity is not only significant for weather forecasting but also for the standardization of risk assessment as in the aviation industry or emergency unit purposes. This paper aimed to develop a prediction of thunderstorm occurrences using a nonlinear model. For this work, the data used for a case study is one-year (1 January 2012 to 31 December 2012) located in a tropical area. The Jacobi algorithm has been employed to construct a prediction model with six combinations of input and one output (target). The predicted target is thunderstorm occurrence. The parameter input is surface pressure, air temperature, relative humidity, clouds, precipitable water vapor, and precipitation. The result obtained a better fit prediction model with four optimum parameters and estimation errors of 5.73%. May and October are the highest occurrences of thunderstorms where prediction errors were found high during the intermonsoon season.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48469285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"APPLICATION OF GIS IN THE DETERMINATION OF VERTICAL RELIEF FRAGMENTATION: A CASE STUDY ON DRENICA RIVER BASIN (KOSOVO)","authors":"Albert Berila, Florim Isufi","doi":"10.21163/gt_2021.161.04","DOIUrl":"https://doi.org/10.21163/gt_2021.161.04","url":null,"abstract":"Advances in Remote Sensing (Digital Elevation Models) products and GIS techniques have made the calculation and analysis of morphometric indices much more accurate, effective, and less timeconsuming. The energy of relief is a morphometric parameter that indicates the vertical variety of relief and represents the potential energy of a given terrain. Calculating morphometric parameters by manual methods is inconvenient because it takes a long time, is subject to mistakes that can be made by humans when extracting these parameters and, consequently leads to wrong conclusions. There is currently no fully automated method to calculate this parameter. The purpose of this paper is to define the procedures for extracting this parameter within a GIS environment using data from high resolution (HR) ALOS-PALSAR (Advanced Land Observing Satellite-Phased Array-Type L-band Synthetic Aperture Radar) Radiometrically Terrain Corrected (RTC) DEM with a spatial resolution of 12.5 m with the help of ArcGIS software. To calculate this parameter, a grid with 1x1 km cells with interpolation points in each cell was constructed. IDW was chosen as the most suitable method for the interpolation of points. Based on the obtained results, the maximum value of relief’s energy for the Drenica River basin reaches 328 m/km. 57.19% of the surface belongs to the low and very low values of relief’s energy, 42.72% belongs to the average values while only 0.09% belongs to the high values. The high participation of very small and small values of this parameter for the Drenica River basin indicates that the total area is increasing towards the creation of flat surfaces. The importance of deriving this parameter is reflected in the fact that the data obtained are quantitative (have numerical value), can be verified and applicable in practice for the purposes of the construction sector, tourism, spatial planning, etc. Key-words: GIS, energy of relief, ALOS-PALSAR DEM, geoprocessing, Drenica River basin.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45019631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"FLOOD DISASTER STUDIES: A REVIEW OF REMOTE SENSING PERSPECTIVE IN CAMBODIA","authors":"Chhuonvuoch Koem, S. Tantanee","doi":"10.21163/gt_2021.161.02","DOIUrl":"https://doi.org/10.21163/gt_2021.161.02","url":null,"abstract":"Flood is the most critical natural disaster in Asia. It is also the most affected disaster in Cambodia. The solution must be made to manage the disaster from being interrupting people. The purposes of the study are to identify the 2011 flood impact spatial distribution, evaluate how RS has been applied to flood analysis, and assess the gaps of RS for flood analysis over Cambodia. The flood impact can be calculated by using a weighted arithmetic mean (WAM). The flood studies can be accessed through several literary databases. The 2011 flood impacts commonly located in the regions of Tonle Sap and Mekong River. Furthermore, other regions were affected. Fourteen articles have been found, which are six flood hazard mappings, seven flood risk assessments, and one flood damage assessment. Most of the study covered the Mekong River and Tonle Sap Lake catchments; however, there are still lacking studies over other affected areas. Besides, flood forecasting and flood early warning were not paid attention. Due to the limitation of rain gauge stations, RS is very important to apply for flood studies. Likewise, the radar composite with the neighboring countries is useful since some parts of the borders were blocked by the mountains. In brief, this review could generate greater ideas and solutions for further flood studies efficiency. Key-words: Flood, Remote Sensing, GIS, TRMM, Cambodia","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46760794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PRECIPITATION USED AS KEY FACTOR IN TAPERED LINE BASED RIVER REPRESENTATION","authors":"Zsolt Magyari-Saska","doi":"10.21163/gt_2020.152.20","DOIUrl":"https://doi.org/10.21163/gt_2020.152.20","url":null,"abstract":": GIS and cartography represent two different study areas but both of them share the map concept. Nowadays, most GIS software incorporates advanced representation and labeling possibilities, and thanks to the database, which is an essential component of any geoinformation system, there are multiple symbolization possibilities, using the stored data. Taking into account this symbiosis between the two components of modern GIS: analysis and advanced representation this study wants push further the cartographic possibilities of them taking advantage of their analysis and modelling part. Through this study we wanted to develop and test a method for river symbolization in which the river’s line width to be proportional with the average precipitation amount at every part of the river. The idea of this study came by working with hand drawn historical maps in which this type of representation is common and very suggestive. Although there are some interesting approaches which want to symbolize river courses based on data, this type of approach presented in this study has not been found. The result obtained from a situation where inaccuracies are inevitable due to very different data sources: a recent DEM with 25m resolution and a map from the beginning of the 20th century with scale of 1: 300000, has shown that this method based on modeling, analysis and GIS operations can be used successfully to have a more accurate, more real and eye catching symbolization of watercourses.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49147965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Costantino, M. Pepe, G. Dardanelli, V. Baiocchi
{"title":"USING OPTICAL SATELLITE AND AERIAL IMAGERY FOR AUTOMATIC COASTLINE MAPPING","authors":"D. Costantino, M. Pepe, G. Dardanelli, V. Baiocchi","doi":"10.21163/GT_2020.152.17","DOIUrl":"https://doi.org/10.21163/GT_2020.152.17","url":null,"abstract":": The continuous availability and rapid accessibility to multispectral data from satellite platforms within the Copernicus Programme represents a great opportunity for users in different fields of applications as: agriculture, observation of coastal zones, monitoring land cover change. The aim of this paper is to identify a suitable method to map coastline using Sentinel-2 optical satellite image. The method provides the use of two indexes developed in remote sensing field for water environment: NDWI (Normalized difference water index) and MNDWI (Modified Normalized difference water index). Starting from the construction of maps of these indexes and, identifying appropriate threshold values, it has been possible to extrapolate the coastline. The coastlines derived from the use of the NDWI and MNDWI index were compared with a coastline obtained from the photointerpretation of a very high resolution orthophoto obtained through photogrammetric techniques. The results show that it is possible to map the coastline automatically and quickly with an intrinsic accuracy close to the geometric resolution bands of Sentinel-2 satellite images.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48337882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M’Beirika Ahmed Salem Cheikh, Mohamed Salem El Mahmoud-Hamed, D. Mamadou, Harouna Tounkara, Mohamed El Housseine Legraa, M. Ramdani, Z. Sidoumou
{"title":"ASSESSMENT OF THE IMPACT OF INDUSTRIAL DEVELOPMENT AT THE COAST OF LÉVRIER BAY THROUGH THE SPATIO-TEMPORAL STUDY OF METALLIC CONTAMINANTS (CD, PB, CU, ZN AND HG) IN SURFACE SEDIMENTS","authors":"M’Beirika Ahmed Salem Cheikh, Mohamed Salem El Mahmoud-Hamed, D. Mamadou, Harouna Tounkara, Mohamed El Housseine Legraa, M. Ramdani, Z. Sidoumou","doi":"10.21163/gt_2020.152.13","DOIUrl":"https://doi.org/10.21163/gt_2020.152.13","url":null,"abstract":": Lévrier Bay is located at the northern Atlantic Mauritanian coast, between 19 ° 20’N and 20 ° 40’N and between the coast and 17 ° 20W in the vicinity of Cap Blanc peninsula. This work aims at contributing to the assessment the impact of industrial development in the Lévrier Bay through the study of the toxicity and the spatio-temporal distribution of trace metals (Cd, Pb, Cu, Zn and Hg) in surface sediments, during the four hydrological seasons. The trace metal concentrations of the sediments are generally heterogeneous and vary according to the metal analyzed and the sampling site according to the order Zn> Cu>Pb> Cd>Hg. In fact, the present work shows higher average concentrations of metals studied in surface sediments than those found for the same metallic elements in previous recent studies at Lévrier Bay, which may be due to anthropogenic pressure in these areas. , especially since the different sites of the Bay are deprived of any sanitation system. In addition, the levels of these metals in the sediments of Lévrier Bay are below the international standards recommended for the toxicity assessment of sediments.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" 42","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41253502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PRELIMINARY ANALYSIS OF FLOODS INDUCED BY URBAN DEVELOPMENT IN YOGYAKARTA CITY, INDONESIA","authors":"S. Suprayogi, R. Latifah, M. Marfai","doi":"10.21163/gt_2020.152.07","DOIUrl":"https://doi.org/10.21163/gt_2020.152.07","url":null,"abstract":": The growing population size in the City of Yogyakarta increases the need for settlement and supporting facilities, which consequently expands land-use conversion from previously vacant, productive, and conservative lands to built-up areas. Meanwhile, extensive development means wider impervious surface and gradually narrowing recharge areas, increasing the potential for flooding. This study aimed to analyze the land-use change in the last fourteen years and its relation to runoff coefficients, the maximum discharges occurring with the return periods of 2, 5, 10, and 25 years, and the inundated areas in each return period. The flood inundation was modelled using HEC-RAS. The results showed, in particular, the expansion of the settlement area during the period of 2004-2017. However, such change did not significantly alter the runoff coefficient and, by proxy, the maximum flood discharge. Spatially, the flood scenarios showed overflows from the upper and middle segments of the river.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42854004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. B. N. Nope, P. Suthanaya, D. M. P. Wedagama, I. Astana
{"title":"THE JAKARTA TOD MODEL APPLICATION FOR TYPOLOGY OF MIDDLE CITIES (APPLIED RESEARCH DESIGN IN KUPANG CITY)","authors":"K. B. N. Nope, P. Suthanaya, D. M. P. Wedagama, I. Astana","doi":"10.21163/gt_2020.151.27","DOIUrl":"https://doi.org/10.21163/gt_2020.151.27","url":null,"abstract":"Realizing the vision of sustainable cities in Indonesia is a necessity. The Indonesian government continues to encourage all parties making various approaches to solving the urban problems to create a livable city in 2045. The TOD is widely recognized by researchers as one of the most feasible and comprehensive sustainable planning approaches. In Indonesia, only Jakarta has begun implementing TOD since 2017. This study aims to obtain respondents' perceptions (government, business actors, and experts) to assess the alignment of the Jakarta TOD Model compared with the key success factor of TOD best practice, also in line with the principles of urban transportation sustainable development. This analysis is quantitative descriptive for hypothesis testing uses non-parametric statistical tests: Independent and Bayesian One-Sample T-Test. The results of the analysis show us that the Jakarta TOD Application Model is not in line yet with the principles of urban and transportation sustainable development. This is caused by several factors of Bayes interpretation. Refers to the result of variable Large Bayes effect analysis (based on Cohen's value d), its need to be re-arrangement some regulations and/or policies by considering: an institutional improvement, integrated planning, definition of TOD, partnership patterns, development strategy, sustainable and inclusive development goals. Key-words: Urban Sustainable, Sustainable Transportation, TOD, Independent and Bayesian One-Sample T-Test","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49252861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"COMPARATIVE STUDY OF THE PATTERNS AND CHARACTERISTICS URBAN MORPHOLOGY IN THE OLD CITY, CASE STUDY ROAD AND BLOCK PATTERNS BENGKULU AND SINGAPORE","authors":"Fitrianty Wardhani, S. Bahri","doi":"10.21163/gt_2020.151.34","DOIUrl":"https://doi.org/10.21163/gt_2020.151.34","url":null,"abstract":": Urban morphology is an applied science that learns about the history of the spatial patterns of a city and learns about the development of a city. The old town area of Bengkulu was an English-built city from 1719 while Singapore was a British formation city as well, due to the London Treaty agreement occurring between the two regions. This Paper aims to be a comparison study between two cities with historical linkages in terms of identifying patterns and characteristic of its city morphology. This research is quantitative descriptive research using two analytical techniques namely diachronic reading and Tipo-morphology. The indicators used to acquire patterns and characteristics of the urban morphology are Bengkulu and Singapore which are aspects of detail consisting of road and block patterns. Through this research is expected to get similarities and differences in the patterns and charactheristic the morphological of both cities. This study will provide an overview and input for the development planning of the more advanced city of Bengkulu.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49418087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AUTOMATION OF DRINKING WATER TREATMENT SYSTEMS IN RURAL AREA","authors":"Eko Nursubiyantoro, Ismianti, A. Wibowo","doi":"10.21163/gt_2020.151.28","DOIUrl":"https://doi.org/10.21163/gt_2020.151.28","url":null,"abstract":": All living things need water to live. The increasing population in the world results the increased demand of water, include in Indonesia. Water scarcity is also a big issue in Indonesia, especially in rural area like Gunung Kidul. In Gunung Kidul people difficult to get clean water. Clean water can be obtained with drinking water system. The drinking water system that now exist in Temuireng Village, Girisuko, Panggang, Gunung Kidul could meet the water need of the people, but there is a problem with the design of the water treatment system. The drinking water treatment system still use semimanual mechanism that less effective and efficient. The purpose of this research is to design the automatic drinking water treatment system that now exist in Temuireng Village to improve the quality of the water in that area and to reduce the operating cost of the systems. With considering the need, technology and some other aspects, this research obtained the new prototype design of the drinking water treatment systems that be equipped with automation.","PeriodicalId":45100,"journal":{"name":"Geographia Technica","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67673617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}