Indonesian Journal of Geography
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The Coastline Change Pattern of Gresik Beach around the Madura Strait, Indonesia
Get PDFThe coastal region is characterized by dynamic changes in its coastline, which can be attributed to various factors. However, the main causes of change along the Gresik coast have yet to be thoroughly studied. Therefore, this research aims to examine the patterns of coastline change along the Gresik coast around the Madura Strait and the influence of wind-generated waves on them. Specifically, the study focuses on four coastal zones: Ujung Pangkah, Sidayu, Bungah, and Manyar districts. The research utilizes satellite imagery and geographic information systems (GIS) as well as methods for calculating ocean waves to analyze the coastline change patterns. The study also examines the impact of ocean wave energy on coastal abrasion and accretion. The findings revealed that the accretion rate in the study area was higher than the erosion rate. The accretion in the coastal area of Gresik is attributed to the flow of the Bengawan Solo River, which carries sediment from upstream. The accretion and abrasion areas for the entire period from 2002 to 2019 were 1063.16 ha and 425.23 ha, respectively. The study also found that the mangrove areas exhibit a higher rate of accretion than abrasion, indicating their potential as a reliable indicator of the effects of sea level rise resulting from global warming.This study revealed that the northern part of Ujung Pangkah District and Bungah District experienced the highest abrasion patterns, whereas no abrasion was observed in Sidayu District. Between 2002 and 2019, the abrasion areas in Ujung Pangkah and Bungah districts totaled 243.96 ha and 178.29 ha, respectively. Wind-generated waves were likely the primary cause of the abrasion in these areas, though other factors may also have contributed to coastline changes. It is essential to consider these factors for effective coastal management in the region
Spatio-Temporal Variations of Reference Evapotranspiration in Western Iran
Get PDFOptimal management of water resources requires accurate determination of water balance components in each region and Evapotranspiration is one of the most important components of water balance. The purpose of this study was to investigate the spatiotemporal variability of reference evapotranspiration in Lorestan province- western Iran country using the Man-Kendall test and GIS then assess the effect of different climatic parameters on ET0 using multivariate regression. Lorestan province with a 28064 km area in western Iran has 9 synoptic stations including Khorramabad, Boroujerd, Aligouderz, Azna, Doroud, Koohdasht, Poldokhter, Aleshatar, and Noorabad. In this study, meteorological data were used for 9 synoptic stations of the Lorestan in a period from 2001 to 2017. The results showed that at most of the stations and most months, the changing trend was decreasing. The annual decrease in Azna station with Z=-2.73 at 99% level, and in the stations of Aligodarz, Kohdasht, and Doroud with Z equal to -2.27, -2.35, and -2.2, respectively at 95% was significant. The spatial distribution of ET0 showed that the maximum amount of ET0 occurred in the south of Lorestan Province, and decreased from south to north and west to east of the study area. These results indicate the influence of latitude and altitude on the spatial distribution of ET0. The impact of different parameters showed the greatest effect of maximum temperature and wind speed on ET0
The Role of City Spatial Plan (RTRW) on Regional Development in Depok City (West Java Province)
Get PDFDepok City has a role as one of the buffer cities in the Jakarta Metropolitan Area (JMA). Therefore, it has been projected as a residential area and inter-city connection. The latter encourages development resulting in land conversion. If land conversion occurs uncontrollably, it will pose an environmental threat and affect the economic and social conditions, such as decreasing food security capacity and augmenting exclusion and marginalization of the urban poor. Depok City Government has stipulated local regulation on the City Spatial Plan (RTRW), which controls land resource allocation and reference for spatial planning and regional development to integrate and guide all activities related to development. Therefore, this study aims to analyze the development level in Depok City and the impact of RTRW on the development level in Depok City. This study uses a composite index to determine the regional development level and a chi-square test to see the correlation between RTRW regulation and regional development level. Depok City is developing to the north, south, and southeast. RTRW has encouraged regional development in Depok City, although there exist disparities in development levels throughout the region
Evaluation of Development Policy through Water Environmental Carrying Capacity Analysis in North Kendeng Mountain, Indonesia
Get PDFNorth Kendeng Mountain has abundant limestone that can potentially be utilized for cement material, cosmetics, paint, and other commercial products. This area also provides water resource storage widely utilized for household use and crop irrigation for local people. This condition has sparked conflict between the government and investors on one side with local people and academicians on the other side. The government and investors, prefer this area for commercial uses while the cons prefer for conservation area. The Strategic Environmental Assessment (SEA) for the North Kendeng ecosystem found that spatial planning and mid-term development planning by the provincial government and related regency governments are oriented toward natural resources utilization and prioritize the area for mining. This paper analyses water environmental carrying capacity implications if the government’s policy and planning are implemented. The type of research is descriptive analysis. The data collection techniques include informal interviews, observation, and literature review. The qualitative data on the development policies are analyzed with content analysis technique including descriptive, interpretative, and explanative. The comparison analysis also conducted to understand the interaction between proposed development activities and the existing environmental condition based on water environmental carrying capacity (WECC) result, and to analyze policy orientation on North Kendeng Mountain Area. After comparing the water demand and availabilityboth with and without government’s policy, this study found that condition of water environmental carrying capacity comparing the demand and availability both with and without policy and planning are deficit for all regencies, except Lamongan regency. This development policy potentially worsens water deficit for all regencies. Therefore, it is suggested that revising the policy and updating the planning are required to achieve sustainable utilization of the North Kendeng Mountain Area.
Typology of Indonesian Stratovolcanoes: Insights from Geomorphological and Geological aspects
Get PDFThis study aims to provide the first general typology of Indonesian stratovolcano (number of analyses=154), including various types of rock compositions and diverse volcanic hazards. Several parameters were evaluated, including average radius (r), average slope (S), surface roughness (RMS), rock compositions, mineralogy, and deposit characteristics. Four types were identified as follows: (1) small-least dissected cones, (2) broad-dissected cones, (3) extremely broad-dissected cones with caldera, and (4) residual-highly dissected cones. Type I is typically small (r=2.1 km), steep (S=19.8ᵒ), rough (RMS=88.8), less evolved (predominantly basic to intermediate), having abundant mafic (olivine, clinopyroxene) and minor hydrous (amphibole, biotite) minerals, with rare pumice and lava domes (mostly scoria and lava flows). Type II has moderate values of r, s, and RMS (8.8 km, 15.2ᵒ, and 47.7, respectively) with predominantly intermediate rocks, minor olivine with abundant hydrous minerals, and abundant pumice and lava domes. Type III is typically large (r=18.1 km), gentle (S=9.2ᵒ), smooth (RMS=40.1), producing abundant felsic rocks and felsic minerals (quartz and sanidine), and characterized by the occurrence of thick ignimbrite deposits. Type IV has relatively similar size to type II (r=8.2 km), but the slope is gentler with coarser surface textures (S=10.7ᵒ and RMS=56.8), includes more portion of ultrabasic rocks and mafic minerals, and has no feature of lava domes with common exposure of intrusions (e.g., dyke). We suggest that the evolution from type I to type III corresponds to maturation stage, whereas the formation of type IV represents erosional stage
Development of a traffic accident simulation system for main roads in Loei Province, Thailand: Application of a geographic information system and multiple logistic regression with clustering
Get PDFTraffic accidents are a major and crucial problem worldwide. The development of a traffic accident simulation system applied by using a geographic information system and multiple logistic regression with clustering can provide drivers with safe routes as well as guidelines for assessing the risk points of accidents in each subdistrict. This research is based on case-control study design. The data were collected by using two types of questionnaires: a questionnaire for 35 community leaders and a questionnaire for 580 community residents based on the distance at which main routes pass through the subdistrict area. The data were analysed through multiple logistic regression with clustering, and the standardized coefficient of the selected variables was then added to the equation as a weight in the traffic accident simulation system. The results of the study indicated that 11 variables affected traffic accidents. These factors were evaluated in order to predict traffic accidents (Pseudo R square=0.5906). Standardized coefficient of variables was applied in a geographic information system to simulate traffic accidents on roads. This study was distinctive for its analysis, which examined the clusters of variables that were the subdistrict-level data, including surroundings and road conditions at the riskiest location in each subdistrict. The data were analysed based on their quality as subdistrict data clusters. The analysis results were then applied as the weight of variables used in the GIS to obtain the values appropriate to the data clusters’ quality for the GIS to properly simulate traffic accidents in each area
Identification of Groundwater Potential Zones Using Remote Sensing and GIS Technique: A Case Study of the Ketungau Basin in Sintang, West Kalimantan
Get PDFGroundwater is one of the most valuable natural resources in Sintang, but essential basic information regarding its properties and characteristics is presently unavailable. Currently, systemic and uniform investigations, as well as groundwater potential zones mapping are yet to be conducted within the framework of basin area units to support development activities. Therefore, this study aims to identify and map groundwater potential zones using remote sensing and GIS. The employed data were obtained from drainage density, slope steepness, straightness density, total rainfall, lithology, soil type, and land use land cover. The method applied was an interpretation of secondary data, which included a) identification and evaluation of criteria, b) data collection, c) preprocessing, and e) reclassification, while the analysis technique used was a weighted overlay. The results showed that the study location has five classes of groundwater potential zones, namely highly potential, potential, moderate, non-potential, and highly non-potential with areas of 120,754.08 ha (20.62%), 220,693.71 ha (37.69%), 109,668.44 ha ( 18.73), 93,404.38 ha (15.95%), and 41,068.31 ha (7.01%), respectively. Highly potential and groundwater potential zones were identified in the central, eastern, and western parts of the Ketungau basin. In contrast, the dominant non-potential and highly non-potential zones were found along the northern basin boundary. Based on the results, remote sensing and GIS approaches are practical tools for identifying groundwater potential zones, which can be used to determine policies related to groundwater utilization
Migration Practices in Europe: Economic and Cultural Factors
Get PDFThis research aimed to identify the economic and cultural factors of migration in Europe within the context of contemporary economic and social realities. To achieve the research objective, a comprehensive multi-stage research project was developed and implemented, incorporating the advantages of statistical analysis, monitoring, rating and summary statistics. The research relied on harmonized and validated statistical data from 48 European countries, divided into four sub-regions, serving as the informational foundation for the study. Using summary statistics on migration factors in the context of economic and cultural factors made it possible to demonstrate the importance of considering cultural human rights in the country’s migration policy. An interpretation of migration practices in Europe by this means enables us to highlight the cultural context as a determining indicator, based on an analysis of objective indicators in the development of migration processes. Furthermore, the study shows that the high quality of life and cultural attractiveness of the national policy stimulates the migration intentions of a person to seek out countries with more developed economies.The findings of this study hold relevance for policymakers and specialists in public administration, particularly those involved in the regulation and control of migration. Additionally, academic researchers can benefit from the empirical regularities established in this research and the identified prospective avenues for future investigations
Potential Tourism Attraction of Cokro Cave, Gunungkidul Regency as a Special Interest Tourism Development
Get PDFCave tracing activities have now become a special interest in tourist activities with kars cave as a tracing ground. One of the attractions is because of the physical shape of the cave or what is called (speleotherm). Speleotourism has a charm and experience that is different from other tourist destinations because not all regions in Indonesia have karst areas that are ideal to be developed as Speleo tourism areas, one of which is Gunungkidul Regency which has 5 caves which are geosites, one of which is Cokro Cave. Cokro Cave was first discovered by nature lovers from the Acintyacunyata Speleological Club (ASC) community in 1993, and in 2009 it began to develop into a tourist attraction managed directly by the local community. This study was conducted to explain how the development of special interest tourism occurred in the tourist attraction of Cokro Cave by utilizing the characteristics and uniqueness of the cave, but still paying attention to the preservation of the cave, as well as the role of local communities, government, and tourism development stakeholders. The concept of special interest tourism that can be applied in the Cokro Cave Area is the management of special interest tourism by limiting the number of visitors to maintain the preservation of the context and collaboration with tourist attractions around and with the Pokdarwis (Kelompok Sadar Wisata) management of the Cave Area. Referring to the six criteria of special interest tourism based on experts, it can be seen that the principles of special interest tourism have not been fully fulfilled in the tourist attraction of Cokro Cave, including no periodic studies on the condition of the cave, as well as monitoring the condition of the cave
The role of Smart Education (SE) in supporting Digital Eco-Literacy (DEL)
Get PDFThe rapid development of computer technology today has implications for high quality educational services and resources. Meanwhile, this era of Smart Education (SE) has given a new picture that the openness and sharing of global knowledge become a top priority for the advancement of education, especially in Digital Eco-Literacy (DEL) learning. The study aims to understand in depth the role of Smart Education (SE) in supporting the development of Digital Eco-Literacy (DEL). The research method used is a qualitative technique with a review paper approach. The findings show that SE will be the key to effectively and efficiently developing DEL Learning. A positive impact on improving student achievement and the ability to understand various environmental problems with a more dynamic and innovative perspective should be considered