scholarly journals Models and spatial patterns of deforestation in the Jeneberang watershed

2021 ◽  
Vol 886 (1) ◽  
pp. 012082
Author(s):  
Syamsu Rijal ◽  
Tirza Tirsyayu ◽  
A Chairil ◽  
Munajat Nursaputra ◽  
Andi Nurul Mukhlisa
Keyword(s):  
Spatial Pattern ◽  
Road Network ◽  
Forest Cover ◽  
Binary Logistic Regression ◽  
Analysis Model ◽  
Large Area ◽  
River Population ◽  
Deforestation Rate ◽  
The Road ◽  
Logistic Regression Method

Abstract Deforestation is an event of permanent land cover change from forest cover to non-forest cover. Deforestation events are very influential on the condition of a watershed area. One of the watersheds on the island of Sulawesi that has become a concern is the Jeneberang watershed because of its influence on the city of Makassar and is a priority watershed in Indonesia. This study aims to analyze the model and spatial pattern of deforestation in the Jeneberang watershed. The deforestation analysis model uses the binary logistic regression method by including factors such as a river, population density, road, count, and slope. Analysis of the spatial pattern of deforestation using Fragstat software based on three indices to describe the spatial pattern, namely the Clumpiness Index, Contiguity Mean Index, and Patch Density. The model of deforestation in the Jeneberang watershed shows the road network factor that has the most influence on the occurrence of deforestation. The road network is quite high in all areas in the Jeneberang watershed including the upstream part as a protection zone. The road network serves as community access between villages and sub-districts in Gowa Regency and connects other regencies such as Sinjai, Takalar, and Jeneponto. The spatial pattern of deforestation in the Jeneberang watershed is grouping, the level of connectivity is high, and it is not fragmented. This pattern shows that deforestation occurs in groups, is interconnected with previously deforested areas, and has a fairly large area. This pattern occurs at a relatively low rate and remains the same when the deforestation rate increases or decreases.

scholarly journals Two-Layer Routing for High-Voltage Powerline Inspection by Cooperated Ground Vehicle and Drone

2019 ◽  
Author(s):  
Yao Liu ◽  
Jianmai Shi ◽  
Zhong Liu ◽  
Jincai Huang ◽  
Tianren Zhou
Keyword(s):  
High Voltage ◽  
Road Network ◽  
Inspection System ◽  
Large Area ◽  
Technical Improvement ◽  
Routing Problem ◽  
Ground Vehicle ◽  
The Road ◽  
Battery Capacity ◽  
On The Road

A novel high-voltage powerline inspection system is investigated, which consists of the cooperated ground vehicle and drone. The ground vehicle acts as a mobile platform that can launch and recycle the drone, while the drone can fly over the powerline for inspection within limited endurance. This inspection system enables the drone to inspect powerline networks in a very large area. Both vehicle’ route in the road network and drone’s routes along the powerline network have to be optimized for improving the inspection efficiency, which generates a new two-layer point-arc routing problem. Two constructive heuristics are designed based on “Cluster First, Rank Second” and “Rank First, Split Second”. Then local search strategies are developed to further improve the quality of the solution. To test the performance of the proposed algorithms, practical cases with different-scale are designed based on the road network and powerline network of Ji’an, China. Sensitivity analysis on the parameters related with the drone’s inspection speed and battery capacity is conducted. Computational results indicate that technical improvement on the inspection sensor is more important for the cooperated ground vehicle and drone system.

scholarly journals Accuracy and Spatial Pattern Assessment of Forest Cover Change Datasets in Central Kalimantan

2018 ◽  
Vol 50 (2) ◽  
pp. 222 ◽  
Author(s):  
Sanjiwana Arjasakusuma ◽  
Uji Astrono Pribadi ◽  
Gilang Aria Seta
Keyword(s):  
Spatial Pattern ◽  
Forest Cover ◽  
Accuracy Assessment ◽  
Accurate Information ◽  
Forest Cover Change ◽  
Forest Change ◽  
Consistency Analysis ◽  
Error Matrix ◽  
Central Kalimantan ◽  
The Road

The accurate information of forest cover change is important to measure the amount of carbon release and sink. The newly-available remote sensing based products and method such as Daichi Forest/Non-Forest (FNF), Global Forest Change (GFC) datasets and Semi-automatic Claslite systems offers the benefit to derive these information in a quick and simple manner. We measured the accuracy by constructing area-proportion error matrix from 388 random sample points and assessed the consistency analysis by looking at the spatial pattern of deforestation and regrowth from built-up area, roads, and rivers from 2010 – 2015 in Katingan district, Central Kalimantan. Accuracy assessment showed that those 3 datasets indicate low to medium accuracy level in which the highest accuracy was achieved by Claslite who produced 71 % ± 5 % of overall accuracy. The consistency analysis provides a similar spatial pattern of deforestation and regrowth measured from the road, river, and built-up area though their distance sensitivity are different one to another. 

Analysis Model for the Continuity Evaluation of Guiding Information

2011 ◽  
Vol 97-98 ◽  
pp. 903-906 ◽  
Author(s):  
Min Huang ◽  
Hai Bin Wu ◽  
Ming Lei Rao
Keyword(s):  
Network Topology ◽  
Road Network ◽  
Present Model ◽  
Analysis Model ◽  
Assessment Index ◽  
New Town ◽  
The Road ◽  
Sign System ◽  
Representation Model ◽  
Basic Functions

To provide continuous guiding information is one of the basic functions in road guide sign system. The representation model of guiding information based on road network topology is presented first in this paper; the meaning of guiding path in guide sign system is introduced then; the analysis model for finding continuous guiding path and the assessment index for guiding continuity is constructed. As an example, the road guide sign system in Guangzhou Zhujiang New Town is analyzed by the present model. It shows that the analysis model is feasible.

scholarly journals Two-Layer Routing for High-Voltage Powerline Inspection by Cooperated Ground Vehicle and Drone

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1385 ◽  
Author(s):  
Yao Liu ◽  
Jianmai Shi ◽  
Zhong Liu ◽  
Jincai Huang ◽  
Tianren Zhou
Keyword(s):  
High Voltage ◽  
Road Network ◽  
Inspection System ◽  
Large Area ◽  
Technical Improvement ◽  
Routing Problem ◽  
Ground Vehicle ◽  
The Road ◽  
Battery Capacity ◽  
On The Road

A novel high-voltage powerline inspection system was investigated, which consists of the cooperated ground vehicle and drone. The ground vehicle acts as a mobile platform that can launch and recycle the drone, while the drone can fly over the powerline for inspection within limited endurance. This inspection system enables the drone to inspect powerline networks in a very large area. Both vehicle’ route in the road network and drone’s routes along the powerline network have to be optimized for improving the inspection efficiency, which generates a new Two-Layer Point-Arc Routing Problem (2L-PA-RP). Two constructive heuristics were designed based on “Cluster First, Route Second” and “Route First, Split Second”. Then, local search strategies were developed to further improve the quality of the solution. To test the performance of the proposed algorithms, different-scale practical cases were designed based on the road network and powerline network of Ji’an, China. Sensitivity analysis on the parameters related to the drone’s inspection speed and battery capacity was conducted. Computational results indicate that technical improvement on the inspection sensor is more important for the cooperated ground vehicle and drone system.

scholarly journals CLASSIFICATION OF FOREST ROADS AND DETERMINATION OF ROUTE USING GEOGRAPHIC INFORMATION SYSTEM

2016 ◽  
Vol 40 (2) ◽  
pp. 329-335
Author(s):  
Fabrício Silva ◽  
Luciano José Minette ◽  
Amaury Paulo de Souza ◽  
Ângelo Casali de Moraes ◽  
Stanley Schettino
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Road Network ◽  
Route Planning ◽  
Geographic Information ◽  
Analysis Model ◽  
Gis Technology ◽  
Forest Roads ◽  
The Road ◽  
On The Road

ABSTRACT Geographic Information System (GIS) is an indispensable software tool in forest planning. In forestry transportation, GIS can manage the data on the road network and solve some problems in transportation, such as route planning. Therefore, the aim of this study was to determine the pattern of the road network and define transport routes using GIS technology. The present research was conducted in a forestry company in the state of Minas Gerais, Brazil. The criteria used to classify the pattern of forest roads were horizontal and vertical geometry, and pavement type. In order to determine transport routes, a data Analysis Model Network was created in ArcGIS using an Extension Network Analyst, allowing finding a route shorter in distance and faster. The results showed a predominance of horizontal geometry classes average (3) and bad (4), indicating presence of winding roads. In the case of vertical geometry criterion, the class of highly mountainous relief (4) possessed the greatest extent of roads. Regarding the type of pavement, the occurrence of secondary coating was higher (75%), followed by primary coating (20%) and asphalt pavement (5%). The best route was the one that allowed the transport vehicle travel in a higher specific speed as a function of road pattern found in the study.

Design of rain gauge network using radar and road network

2021 ◽  
Author(s):  
Taeyong Kwon ◽  
Sanghoo Yoon
Keyword(s):  
Nuclear Power ◽  
Road Network ◽  
Conditional Entropy ◽  
Radar Data ◽  
Rain Gauge ◽  
Large Area ◽  
The Road ◽  
Basin Area ◽  
Rain Gauge Network ◽  
Small Basin

<p>Uncertainty in the gauged network can lead to inaccuracies in dam operations. Entropy is a well-known measurement of uncertainty. Goesan Dam has a small basin area and is affected by a small amount of precipitation, and Hwacheon Dam is contained outside the territory of South Korea, making it difficult to observe the water flow. The observed gauged precipitation and radar data on rainy days were considered between 2018 and 2019. Choosing appropriate radar were performed based on the priority of the rainfall gauge network using conditional entropy. This is because the rainfall gauge network is the actual precipitation and it can only cover certain points. However, the radar is the cloud reflectivity of a large area. Therefore the location of additional rain spots was selected through conditional entropy of highly consistent radar data. Nevertheless, there might be difficulties in installing gauged equipment in reality. So the optimal rainfall network was designed in consideration of the road network. As a result, the uncertainty of precipitation in Goesan Dam and Hwachoen Dam could be decreased by 63.3% and 67.9% respectively when three additional potential rain points were operated without any restriction. The uncertainty in the Goesan Dam basin and Hwachoen Dam would be reduced up to 55.3% and 65.0% when three additional potential rain points were installed nearby the road network. Therefore, through the proposed method, an optimal rainfall network can be designed by balancing cost and uncertainty.</p><p>This work was supported by KOREA HYDRO & NUCLEAR POWER CO., LTD (No. 2018-Tech-20)</p>

ANALISIS PENGARUH PEMBANGUNAN JALAN LAYANG JANTI TERHADAP PERKEMBANGAN TATA RUANG KAWASAN JANTI STUDI KASUS : KAWASAN JANTI, DESA CATURTUNGGAL, KABUPATEN SLEMAN, D. I. YOGYAKARTA

2017 ◽  
Vol 11 (3) ◽  
pp. 255
Author(s):  
Jeky El Boru
Keyword(s):  
Road Network ◽  
Open Space ◽  
Qualitative Description ◽  
Analysis Method ◽  
Open Spaces ◽  
The Road ◽  
Before And After ◽  
Linkage Method ◽  
The Impact ◽  
Parking Place

Abstract: This research aims to analyze the impact of Janti Flyover Construction toward the growth of layout at Janti Urban Area, including structured space, open space, and linkage. Method used for data collecting are observation, air photograph monitoring, and interview, whereas the analysis method is qualitative description, which is the superimposed method of two layers, that are the layout condition before and after flyover construction. The result shows that the impact of Janti Flyover construction can be seen on building mass (solid), the increasing number of open spaces, including the road network, parking place, and park, whereas the relation between spaces, visually and structurally, can be seen on the growth of buildings which have new shapes and styles, therefore the performance of the overall building does not have a proportional shape. Considering Janti Street at the collective relation, its role is getting stronger as the main frame road network.Keywords: Flyover construction, layout changing, Janti AreaAbstrak: Penelitian ini bertujuan untuk menganalisis pengaruh pembangunan Jalan Layang Janti terhadap perkembangan tata ruang Kawasan Janti, meliputi ruang terbangun, ruang terbuka, serta hubungan antar ruang (“linkage”). Metode pengumpulan data dilakukan melalui observasi, pengamatan foto udara, dan wawancara; sedangkan metode analisis melalui deskripsi secara kualitatif yang berupa “superimposed method” dari dua lapisan kondisi lahan, yakni kondisi tata ruang sebelum dan sesudah pembangunan jalan layang. Hasil penelitian menunjukkan bahwa pengaruh pembangunan Jalan Layang Janti terdapat pada massa bangunan (“solid”), pertambahan ruang terbuka yang berupa jaringan jalan, parkir, dan taman; sedangkan pada hubungan antar ruang ̶ secara visual dan struktural ̶ yakni tumbuhnya bangunan dengan bentuk dan gaya baru, sehingga bentuk tampilan bangunan secara keseluruhan tidak proporsional. Pada hubungan kolektif, Jalan Janti semakin kuat perannya sebagai kerangka utama jaringan jalan.Kata kunci : Pembangunan jalan layang, tata ruang, Kawasan Janti

STUDY OF MOVEMENTS MOBILITY-IMPAIRED POPULATION GROUPS IN PEDESTRIAN ZONES OF THE STREET-ROAD NETWORK (in the example of city of Kiev)

2017 ◽  
Author(s):  
Oleksandra Cherednichenko ◽  
Keyword(s):  
European Union ◽  
Comparative Analysis ◽  
Road Network ◽  
Actual State ◽  
The European Union ◽  
Regulatory Requirements ◽  
Population Groups ◽  
The Road ◽  
Mobility Impaired

The results of the study of the main elements of unobstructed space are presented and the compliance of the actual state with the regulatory requirements of measures to ensure a safe, comfortable, accessible and informative pedestrian zone of the road network is analyzed. A comparative analysis of the main regulatory requirements for access ramps on the legislation of Ukraine and the European Union is carried out.

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