Temat: threshold value - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Semi-automatic geo-processing procedure for the vulnerability mapping of industrial facilities in areas with the potential volcanic ash fallout
Autorzy:: Ancione, G.
Milazzo, M. F.
Salzano, E.
Maschio, G.
Powiązania:: https://bibliotekanauki.pl/articles/2069382.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:: Na-Tech risk
vulnerability mapping
threshold value
ash fallout
exceedance probability
geoprocessing
Opis:: Following recent severe natural events, attention has been focused on industrial installations located in areas prone to natural hazards. This work concerns the study of volcanic Na-Tech events (i.e. technological risks triggered by natural causes) and aims at defining a procedure for the representation of the vulnerability of industrial facilities in areas with the potential volcanic ash fallout by means a Geographical Information System (GIS). Here, we focused on the construction of a semi-automatic procedure for the vulnerability mapping for cases where input data is very limited; it is based on the use of a specific tool named ModelBuilder of the ArcGIS software.
Źródło:: Journal of Polish Safety and Reliability Association; 2013, 4, 1; 1--8
2084-5316
Pojawia się w:: Journal of Polish Safety and Reliability Association
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Exceedance probability of selected low characteristic flows in mountain catchments
Autorzy:: Weglarczyk, S.
Powiązania:: https://bibliotekanauki.pl/articles/60762.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: exceedance probability
low flow
characteristic flow
mountain catchment
flow duration curve
threshold value
annual minimum flow
maximum annual flow
Vistula River
Opis:: In Polish hydrology and water management the term characteristic flow exists denoting a specific value of flow at the given cross-section of a river calculated as the long-term minimum, mean, median or maximum calculated using the annual minimum, mean, median or maximum flow taken for each year from a series of (usually) daily flows. Some of these characteristic flows are used to define the low-flow (o drought) periods while the another criterion: a percentage flow Qp taken from the long-term flow duration curve is also widely used. In the paper the study on the frequency structure the empirical exceedance probability of a given characteristic flow made for some low and average characteristic flows (SNQ, WNQ, NSQ and SSQ) is presented. The results show that the exceedance probability of a given characteristic flow is variable, and the amount of this variability may be large, as is the case of WNQ and NSQ. So assigning a characteristic flow to a single FDC quantile value Qp (as can be find in the literature) cannot be justified. Correlation analysis made for the pairs (P. , characteristic flow), ( P., catchment area) and (P. , gauging station elevation) revealed some significant correlations. Only for SNQ is not correlated at all; correlation for other characteristic flows is statistically significant for at least one of the cases. The highest correlations (greater than 0.4 in absolute values) were found for the pairs ( P, gauging station elevation) for NSQ and, for SSQ, ( P, SSQ) and ( P, catchment area).
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2014, IV/3
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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