scholarly journals Real-time forecasting of typhoon inundation extent in a partially-gauged area through the integration of ARX-based models and a geographic information system

2016 ◽  
Author(s):  
Huei-Tau Ouyang ◽  
Yi-Chun Chen
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Real Time ◽  
Geographic Information ◽  
Water Levels ◽  
Terrain Analysis ◽  
Inundation Maps ◽  
Inundation Extent ◽  
Elevation Model ◽  
Representative Points

Abstract. This study presents a methodology for forecasting the extent of inundation and depth of distribution during typhoons in real-time. The proposed approach involves the construction of ARX and ARMAX models capable of predicting water-levels at the locations of on-site gauging stations and representative points located at the outlets of the sub-areas obtained by terrain analysis using a geographic information system. The models are constructed based on historical typhoon data and the results of numerical simulations related to inundation. A database comprising layers of inundation maps related to water-levels in each sub-area based on the assumption of flat-water and the digital elevation model (DEM) of the area were assembled prior to the typhoon. Water-levels during the typhoon are forecast using the constructed models, whereupon inundation sub-maps associated with the forecasted water-levels are extracted from the database. The resulting inundation map is comparable to that obtained using Synthetic Aperture Radar. Processing can be conducted in real-time and requires very little computational resources. This provides valuable lead time in which to conduct efforts aimed at damage mitigation during a typhoon.

scholarly journals Soil loss estimation using geographic information system in enfraz watershed for soil conservation planning in highlands of Ethiopia

2016 ◽  
Vol 5 (2) ◽  
pp. 21-30 ◽  
Author(s):  
Gizachew Tiruneh ◽  
Mersha Ayalew
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Soil Loss ◽  
Satellite Images ◽  
Geographic Information ◽  
Rainfall Erosivity ◽  
Gis And Remote Sensing ◽  
Digital Elevation ◽  
Elevation Model ◽  
Soil Loss Rate

Accelerated soil erosion is a worldwide problem because of its economic and environmental impacts. Enfraz watershed is one of the most erosion-prone watersheds in the highlands of Ethiopia, which received little attention. This study was, therefore, carried out to spatially predict the soil loss rate of the watershed with a Geographic Information System (GIS) and Remote Sensing (RS). Revised Universal Soil Loss Equation (RUSLE) adapted to Ethiopian conditions was used to estimate potential soil losses by utilizing information on rainfall erosivity (R) using interpolation of rainfall data, soil erodibility (K) using soil map, vegetation cover (C) using satellite images, topography (LS) using Digital Elevation Model (DEM) and conservation practices (P ) using satellite images. Based on the analysis, about 92.31% (5914.34 ha) of the watershed was categorized none to slight class which under soil loss tolerance (SLT) values ranging from 5 to 11 tons ha-1 year-1. The remaining 7.68% (492.21 ha) of land was classified under moderate to high class about several times the maximum tolerable soil loss. The total and an average amount of soil loss estimated by RUSLE from the watershed was 30,836.41 ton year-1 and 4.81 tons ha-1year-1, respectively.Int. J. Agril. Res. Innov. & Tech. 5 (2): 21-30, December, 2015

Using geographic information system and knowledge base system technology for real-time planning of site characterization activities

1999 ◽  
Vol 36 (2) ◽  
pp. 300-312 ◽  
Author(s):  
Yi-Chang Tsai ◽  
J David Frost
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Knowledge Base ◽  
Real Time ◽  
Prior Information ◽  
Site Characterization ◽  
Geographic Information ◽  
Prototype System ◽  
Base System ◽  
Knowledge Base System

Site characterization activities involving a variety of different tools and techniques are a key component of any environmental rehabilitation program. Depending on the specific characteristics and requirements of the project, a range of tools can be used to characterize the surface and subsurface conditions. The results will be subject to specific limitations which will apply to a particular tool in terms of the depth investigated and the resolution of the measurements obtained as a result of the sensor capacity and background noise conditions. This paper presents a methodology that can be used to evaluate the relative merits of alternative sampling plans for a site and assist in identifying the optimal sampling plan taking into account the amount and type of prior information. This methodology allows new test results to be incorporated in real time as "prior information" as the site investigation proceeds. The methodology is implemented using a geographic information system (GIS) and a knowledge base system (KBS). Factors considered in the methodology include the effective measured area, the likely target characteristics, surface and subsurface noise conditions, and the level of confidence that exists about the possible source location as a result of prior studies at the site. The results of a sensitivity study are presented. An example is used to demonstrate the capability of the prototype system to assess different test configurations.Key Words: characterization, GIS, KBS, planning, quality.

scholarly journals Analisis dan Perancangan Geographic Information System pada Pelacakan Lokasi Kurir Secara Real Time

Techno Com ◽  
2018 ◽  
Vol 17 (2) ◽  
pp. 186-196
Author(s):  
Muhamad Anbiya Nur Islam ◽  
Much Aziz Muslim ◽  
Hendi Susanto
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Real Time ◽  
Time Estimation ◽  
Geographic Information ◽  
Google Maps ◽  
Time System ◽  
Real Time System ◽  
Time Marker ◽  
Programming Interface

Kecepatan akses informasi menjadi pembahasan cukup penting dalam pembuatan aplikasi. Teknologi yang mulai merambah pada dunia serba mobile menjadikan kecepatan dan kepraktisan akses informasi menjadi prioritas utama dalam pelayanan fitur sebuah aplikasi. Aktivitas logistik yang melibatkan banyak komponen pengguna memerlukan suatu sistem informasi yang dapat memberikan layanan informasi cepat dan akurat. Pada penelitian ini penulis membuat Real time system berbasis Geographic Information System, untuk mengakomodasi kebutuhan komunikasi data lokasi antara kurir dan outlet. Metode yang digunakan dalam penelitian ini memanfaatkan Aplication Programming Interface yang disediakan oleh Google, yaitu Google Maps API. Data spasial yang digunakan pada penelitian ini mengambil dari data Maps milik Google. Hasil penelitian ini adalah suatu sistem yang saling berkomunikasi mengirim data spasial berupa latitude, longitude, distance, time estimation, route, dan real time marker. Penggunaan GIS berbasis Google Maps API ini sangat efektif dalam membantu estimasi dan monitoring proses pengiriman dan jual beli.

scholarly journals Use of a geographic information system to map cases of measles in real-time during an outbreak in Dublin, Ireland, 2011

2012 ◽  
Vol 17 (49) ◽  
Author(s):  
G Fitzpatrick ◽  
M Ward ◽  
O Ennis ◽  
H Johnson ◽  
S Cotter ◽  
...  
Keyword(s):  
Public Health ◽  
Information System ◽  
Geographic Information System ◽  
Real Time ◽  
Vaccination Campaign ◽  
Public Health Intervention ◽  
Geographic Information ◽  
Digital Mapping ◽  
First Case ◽  
Measles Outbreak

In 2011, there was a large measles outbreak in Dublin. Nationally 285 cases were notified to the end of December 2011, and 250 (88%) were located in the Dublin region. After the first case was notified in week 6, numbers gradually increased, with 25 notified in June and a peak of 53 cases in August. Following public health intervention including a measles-mumps-rubella (MMR) vaccination campaign, no cases were reported in the Dublin region in December 2011. Most cases (82%) were children aged between 6 months and 14 years, and 46 cases (18%) were under 12 months-old. This is the first outbreak in Dublin to utilise a geographic information system for plotting measles cases on a digital map in real time. This approach, in combination with the analysis of case notifications, assisted the department of public health in demonstrating the extent of the outbreak. The digital mapping documented the evolution of two distinct clusters of 87 (35%) cases. These measles cases were infected with genotype D4-Manchester recently associated with large outbreaks across Europe. The two clusters occurred in socio-economically disadvantaged areas and were attributable to inadequate measles vaccination coverage due in part to the interruption of a school-based MMR2 vaccination programme.

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