scholarly journals Flood vulnerability mapping using the spatial multi-criteria evaluation (SMCE) method in the Minraleng Watershed, Maros Regency, South Sulawesi

2020 ◽  
Vol 153 ◽  
pp. 01004
Author(s):  
Muhammad Fadhil ◽  
Yoanna Ristya ◽  
Nahra Oktaviani ◽  
Eko Kusratmoko
Keyword(s):  
Information System ◽  
Rainfall Intensity ◽  
Physical Factors ◽  
Relative Importance ◽  
Flood Vulnerability ◽  
South Sulawesi ◽  
Multi Criteria Evaluation ◽  
Gis Environment ◽  
Very High ◽  
Vulnerable Zones

This study focuses on the assessment of flood-vulnerable areas in the Minraleng watershed, Maros Regency, where the area experiences floods every year. Spatial analysis in the Geographic Information System (GIS) environment has been applied to estimate flood-vulnerable zones using six relevant physical factors, such as rainfall intensity, slope, Elevation, distance from the rivers, land use and soil type. The relative importance of physical factors has been compared in paired matrices to obtain weight values using the Spatial Multi-Criteria Evaluation (SMCE) method. The result showed that the areas located in Camba sub-district had the high vulnerability. The region with a high and very high vulnerability to flood were spread with an area of 436 ha (0,84 %) and 6.168 ha (11.8%).

scholarly journals Landslide susceptibility mapping using Spatial Multi-Criteria Evaluation (SMCE) method in Camba Sub-district, Maros Regency, South Sulawesi

2020 ◽  
Vol 153 ◽  
pp. 02007
Author(s):  
Nahra Oktaviani ◽  
Yoanna Ristya ◽  
Muhammad Fadhil ◽  
Eko Kusratmoko
Keyword(s):  
Landslide Susceptibility ◽  
Susceptibility Mapping ◽  
Disaster Mitigation ◽  
Landslide Susceptibility Mapping ◽  
Slope Aspect ◽  
Physical Factors ◽  
Preparedness Planning ◽  
South Sulawesi ◽  
Multi Criteria Evaluation ◽  
Very High

This research presents the results of a landslide susceptibility mapping using Geographic Information Systems (GIS) based statistical namely Spatial Multi-Criteria Evaluation (SMCE) in Camba Sub-district, Maros Regency, South Sulawesi. Ten physical factors encompassed soil type, slope, slope aspect, rock type, altitude, land cover, distance from the river, rainfall, distance from faults, and distance from the road that collected from several sources and used to determined landslide susceptible areas. SMCE was applied to classify the degree of landslide susceptibility from low to very high classes. Validation using 30 points of landslide events obtained from field survey. The result showed an area with high and very high classes has an area 2079 ha (18,3 %) and 52,5 ha (0,46 %) distributed in the southern region. The results of validation using the R-index for very high and high classes is 55% and ROC shows that of 96.4%, for the P show method of 98%. This landslide mapping can be used for disaster mitigation and disaster preparedness planning purposes.

scholarly journals Flood vulnerability assessment in the Accra Metropolis, southeastern Ghana

2021 ◽  
Vol 11 (7) ◽  
Author(s):  
Benjamin Wullobayi Dekongmen ◽  
Amos Tiereyangn Kabo-bah ◽  
Martin Kyereh Domfeh ◽  
Emmanuel Daanoba Sunkari ◽  
Yihun Taddele Dile ◽  
...  
Keyword(s):  
Drainage Density ◽  
Geological Structures ◽  
Flood Vulnerability ◽  
Rock Types ◽  
Digital Elevation ◽  
Annual Population ◽  
Density Values ◽  
High Runoff ◽  
Elevation Model ◽  
Very High

AbstractFloods in Ghana have become a perennial challenge in the major cities and communities located in low-lying areas. Therefore, cities and communities located in these areas have been classified as potential or natural flood-prone zones. In this study, the Digital Elevation Model (DEM) of the Accra Metropolis was used to assess the drainage density and elevation patterns of the area. The annual population estimation data and flood damages were assessed to understand the damages and population trend. This research focused primarily on the elevation patterns, slope patterns, and drainage density of the Accra Metropolis. Very high drainage density values, which range between 149 and 1117 m/m2, showed very high runoff converging areas. High drainage density was also found to be in the range of 1117–1702 m/m2, which defined the area as a high runoff converging point. The medium and low converging points of runoff were also found to be ranging between 1702–2563 m/m2 and 2563–4070 m/m2, respectively. About 32% of the study area is covered by natural flood-prone zones, whereas flood-prone zones also covered 33% and frequent flood zones represent 25%. Areas in the Accra Metropolis that fall in the Accraian and Togo series rock types experience high floods. However, the lineament networks (geological structures) that dominate the Dahomeyan series imply that the geological structures in the Dahomeyan series also channel the runoffs into the low-lying areas, thereby contributing to the perennial flooding in the Accra Metropolis.

The Research on Computation of Researchers Certainty Factor of Bridge's Durability Evaluation Based on the Indeterminate AHP

2014 ◽  
Vol 578-579 ◽  
pp. 1469-1472
Author(s):  
Xiao Zhen Chen ◽  
Xue Jun Zhang
Keyword(s):  
Lower Bound ◽  
Similarity Theory ◽  
Research Result ◽  
Weight Coefficient ◽  
Practical Experience ◽  
Relative Importance ◽  
Certainty Factor ◽  
Average Value ◽  
Judgment Matrix ◽  
Very High

Because of fuzziness, uncertainty of structure and researchers practical experience, it is more practical to express the relative importance of indexes with interval number. Firstly, according to researchers indeterminate judgment matrix, the upper and lower bound matrixes are formed; secondly, the similarity and the differences of the upper and lower bound matrixes of the relative importance matrix from different experts is studied by using the similarity theory of vector; lastly, certainty factor of researchers according to the upper and lower bound matrixes can be calculated, and the average value is regarded as the researchers certainty factor. The certainty factors of researchers upper and lower bound matrixes are consider together, the researchers experience is fully considered and the error from indeterminate judgment matrix to indeterminate judgment matrix is avoided. The result affords basis to calculate the weight coefficient, the research result comparing with the other method showed that the computation accuracy in this paper was very high.

scholarly journals Reclaimed Asphalt Pavement (RAP) Based on a Geospatial Information System (GIS)

2020 ◽  
Vol 28 (2) ◽  
pp. 36-42
Author(s):  
Hossein Hariri Asli ◽  
Mahyar Arabani ◽  
Yaser Golpour
Keyword(s):  
Information System ◽  
Asphalt Pavement ◽  
Reclaimed Asphalt Pavement ◽  
Geospatial Information ◽  
Reclaimed Asphalt ◽  
Medium Risk ◽  
Profile Depth ◽  
Risk Zones ◽  
The Mean ◽  
Very High

AbstractA Geospatial Information System (GIS) is a system designed to capture, store, manipulate, analyze, manage, and present spatial or geospatial data. Reclaimed Asphalt Pavement (RAP) based on the GIS is one of the indirect and efficient methods in identifying areas. In this work, an analytical computational process combined with a spatial analysis was used to identify pavement zones for a city. The zoning results were categorized in four classes, including very high, high, medium risk, and low risk zones. The high and very high risk zones have been considered as a whole. The work circumstances include the Mean Profile Depth (MPD) data as a function of the number of wheel passes and the temperature; ten (10) specimens were selected from a set of 23 specimens. The results showed a good correlation between the parameters, including the number of wheels passing, the temperature, and the MPD.

scholarly journals ANALISIS KEBERLANJUTAN ADOPSI KAPAS TRANSGENIK DI SULAWESI SELATAN

2020 ◽  
Vol 9 (4) ◽  
pp. 135
Author(s):  
Agus Wahyudi ◽  
Syahrial Taher ◽  
Rahmi Watt
Keyword(s):  
Maximum Likelihood ◽  
Random Sampling ◽  
Sampling Method ◽  
Simple Random Sampling ◽  
Farming System ◽  
Transgenic Cotton ◽  
Research Area ◽  
South Sulawesi ◽  
Very High ◽  
Time Of Harvest

<p>Adopsi Kapas transgenik yang diinlroduksi secara terbatas sejak tahun 2000 di tujuh kabupaten di Sulawesi Selatan perlu dicvaluasi kebcrlanjutannya Penelitian ini bertujuan untuk menganalisis faktor - faktor yang mempengaruhi peluang keberlanjutan petani dalam mengadopsi kapas transgenik di daerah introduksi yaitu tujuh kabupaten di Provinsi Sulawesi Selatan. Kerangka penelitian yang digunakan adalah peluang keberlanjutan adopsi dipengaruhi oleh karaktcr subyek, karaktcr inovasi, dan lingkungan fisik dan sosial. Dengan kriteria sebaran dan luas kapas transgenik, pola sebaran curah hujan, dan waktu panen maka daerah yang terpilih adalah Kabupaten Bantaeng, Takalar, Gowa, dan Bulukumba, dan penelitian dilaksanakan pada bulan Agustus-September 2002. Metode pengambilan contoh petani digunakan metode acak sederhana, karena homogenitas Icarakter yang diinginkan relatif tinggi. Metode analisis data yang digunakan adalah analisis regresi berganda yang pendugaannya dengan metode maximum likelihood. Hasil analisis menunjukkan bahwa lebih dai 50% petani berpeluang untuk bcrhenti mengadopsi. Hal ini antara lain disebabkan ketidakmampuan petani untuk menanggung resiko usahatani kapas transgenik yang tinggi, sedang pendapatan yang diharapkan kurang stabil. Selain itu adopsi berpeluang besar akan berlanjut di daerah yang iklimnya sesuai dan kompatible dengan musim dan pola tanam yang ada.</p><p>Kata kunci: Kapas transgenic, adopsi, keberlanjutan, resiko usahatani, pendapatan</p><p> </p><p><strong>ABSTRACT</strong></p><p><strong>Analysis of sustainability of transgenic cotton adoption in South Sulawesi</strong></p><p>The adoption of transgenic conon that has been introduced since 2000 in seven regencies of South Sulawesi need to be evaluated further. The objective of the study was to analyze factors which influenced the adoption of transgenic cotton by the farmers in the introduction area. The research frame used is sustainability of adoption depend on characteistics of subjects and innovation and physical and social environment. Citeia used to determine research area were distribution and coverage of transgenic conon farms, distibution pattern of rainfall, and time of harvest. The area chosen were Regency of Bantaeng, Takalar, Gowa, and Bulukumba. The sampling method used was simple random sampling, since the population was relatively homogen. The results of the analysis indicated that more than SO % of the farmers had a chance to stop adopting the transgenic conon. Il happened because the farmers were uncapablc to take the isk of transgenic coton farming which was very high, while the income rom this farming was not stable. However, the adoption of transgenic cotton is potential in the area where the climate is suitable and compatible with the seasons and existing farming system.</p><p>Key words: Transgenic coton, adoption, sustainability, farm risk, income</p>

scholarly journals Analysis of erodibility factors and declivity in the Gurgueia River sub-basin, Piauí, Brazil

Terr Plural ◽  
2021 ◽  
Vol 15 ◽  
pp. 1-14
Author(s):  
Livânia Norberta Oliveira ◽  
Cláudia Maria Sabóia Aquino
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Soil Degradation ◽  
Production Capacity ◽  
Soil Management ◽  
Environmental Problems ◽  
Economic Sustainability ◽  
Average Slope ◽  
Very High

Soil degradation caused by erosion is one of the biggest environmental problems. The Geographic Information System (GIS) QGIS and ArcGIS were used to prepare thematic maps. The average slope resulted in smooth wavy (42.1%), flat (27.8%), and wavy to strong wavy (19.9%) over the entire length of the sub-basin. Erodibility resulted in very high (41%) mainly in sectors with a predominance of Neossolos Quartzarênicos soils, on average (7.1%) in the South and Southwest and low (51.1%) of the area corresponding to the soil of the type Dystrophic Yellow Latosol. The expansion of the agribusiness associated with inadequate soil management in areas susceptible to erosion at BHRG can compromise long-term environmental, social, and economic sustainability. It is important develop suitable agricultural techniques appropriate to the soil to optimize its use and its sustainable production capacity.

scholarly journals Selecting key areas for conservation at the regional level: the case of the globally ‘Near Threatened’ Cinereous Vulture Aegypius monachus in south-east Portugal

2012 ◽  
Vol 23 (2) ◽  
pp. 168-183 ◽  
Author(s):  
PEDRO M. LOURENÇO ◽  
NUNO CURADO ◽  
FILIPA LOUREIRO ◽  
ALFONSO GODINO ◽  
EDUARDO SANTOS
Keyword(s):  
Regional Level ◽  
Relative Importance ◽  
Analytic Hierarchy ◽  
Nesting Sites ◽  
Conservation Actions ◽  
Bibliographic Search ◽  
Cinereous Vulture ◽  
Suitability Maps ◽  
Gis Environment ◽  
Hierarchy Process

SummarySince the resources available for nature conservation tend to be very limited, localised conservation actions are often the only feasible management option. Therefore, we must select key areas where these actions will be most effective. Here we used Weighted Linear Combination (WLC) to integrate various variables in a GIS environment and identify key areas for implementing conservation actions benefiting Cinereous Vultures Aegypius monachusin south-east Portugal. Through a bibliographic search, we selected four main variables and sub-variables related to land use, food availability, disturbance and topography. These were weighted for their relative importance using the Analytic Hierarchy Process (AHP) and combined using WLC to obtain suitability maps for the best nesting and foraging sites for Cinereous Vultures. Overall, the study areas show moderate to high suitability as foraging areas for the species, but only a few small patches seem suitable as nesting sites. The use of GIS-based decision support systems, such as WLC, together with an objective method for weighting variables, like the AHP, allows for the integration of large amounts of cartographic information into suitability maps that can easily be used to select key areas for conservation at the regional level.

Impact of zinc roofing on urban runoff pollutant loads: the case of Paris

2002 ◽  
Vol 45 (7) ◽  
pp. 113-122 ◽  
Author(s):  
M.C. Gromaire ◽  
G. Chebbo ◽  
A. Constant
Keyword(s):  
Urban Runoff ◽  
Potential Contribution ◽  
Relative Importance ◽  
Cadmium Contamination ◽  
Corrosion Rates ◽  
High Zinc ◽  
Zinc Corrosion ◽  
Wet Weather ◽  
Annual Scale ◽  
Very High

Previous research on the Marais catchment in Paris demonstrated the very high zinc and cadmium contamination of runoff from zinc roofing. Thus further investigations were aimed at evaluating the relative importance of this type of roofing in Paris and its potential contribution to zinc and cadmium loads in wet weather flows. According to these results, about 40% of the surface of roofs in Paris is covered with rolled zinc (1016 ha), and this proportion is not likely to vary significantly in the next years, due to architectural rules. The Zn and Cd concentrations measured in runoff from these roofs are in accordance with literature data on zinc corrosion rates, in the presence of SO2. On an annual scale, runoff from Parisian zinc roofs produces around 34 to 64 metric tonnes of zinc and 15 to 25 kg of cadmium, which is approximately half the load generated by runoff from total Paris.

scholarly journals Low-Cost Archaeological Investigation and Rapid Mapping of Ancient Stone Tidal Weirs in the Penghu Archipelago Using Google Earth

2019 ◽  
Vol 11 (17) ◽  
pp. 4536 ◽  
Author(s):  
Lei Luo ◽  
Xinyuan Wang ◽  
Jie Liu ◽  
Wenwu Zheng ◽  
Jing Zhen ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Information System ◽  
Spatial Distribution ◽  
Low Cost ◽  
Google Earth ◽  
Gis Analysis ◽  
Archaeological Investigation ◽  
Rapid Mapping ◽  
The Taiwan Strait ◽  
Very High

This paper provides a brief history review of the use of ancient weirs in fishing on our planet, as well as a pilot study that involves investigating and mapping the coastal heritage of ancient stone tidal weirs (STWs) in the Penghu Archipelago which is located in the Taiwan Strait. The spatial distribution and morphological features of STWs across Penghu Archipelago were investigated and analyzed using very high-resolution (VHR) and freely available Google Earth (GE) imagery and geographic information system (GIS) analysis tools. A total of 539 ground-truthed STWs were identified from multiple temporal GE images, and these accounted for over 90% of the localized inventory databases. The proposed GE-based method was found to be more efficient, timely and effective compared to field and airborne surveys. This paper illustrates the utility of GE as a source of freely available VHR remote sensing imagery for archaeological surveys and heritage sustainability in coastal areas.

HOW IMPORTANT IS THE SIZE OF A REPRINT ORDER?

2003 ◽  
Vol 19 (4) ◽  
pp. 711-714 ◽  
Author(s):  
Sally Hopewell ◽  
Mike Clarke
Keyword(s):  
Randomized Trials ◽  
Citation Index ◽  
Control Group ◽  
Relative Importance ◽  
The Mean ◽  
Control Set ◽  
Number Of Citations ◽  
The Impact ◽  
Very High ◽  
Subsequent Literature

Objectives: This study aims to assess the impact of articles with very high reprint orders (“high-reprint articles”) by measuring their citation in the subsequent literature as compared with a control group of articles.Methods: The twenty-one articles (published in the Lancet in 1998) with reprint orders of over 10,000 were matched with a control set of twenty-one articles with smaller reprint orders. The Science Citation Index was used to obtain the number of citations for each of the forty-two articles.Results: The twenty-one high-reprint articles were cited 2,548 times; the mean number of citations was 121 (range, 3 to 499 citations per article). Five of the twenty-one high-reprint articles had more than 200 citations, but seven (33%) were cited twenty-five times or fewer. The twenty-one control articles were cited 986 times; the mean number of citations was forty-seven (range, 1 to 165). Fifteen (71%) of the twenty-one control articles were cited twenty-five times or fewer. Thirteen of the high-reprint articles were reports of randomized trials with a mean of 163 citations. In the control articles, six were reports of randomized trials with a mean of eighty-eight citations.Conclusions: Articles with a high-reprint order were cited more frequently than other articles. However, some high-reprint articles were cited infrequently. If the size of a reprint order is related to the importance of an article, those articles with very high reprint orders may, therefore, be perceived as more important. Further research is needed to explore other aspects of the relative importance and impact of high-reprint articles.

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