Space-time scaling laws for self-triggered control

2008 ◽  
Author(s):  
Adolfo Anta ◽  
Paulo Tabuada
Keyword(s):  
Scaling Laws ◽  
Space Time ◽  
Time Scaling

Space-time characteristics of areal reduction factors and precipitation mechanisms

2020 ◽  
Author(s):  
Korbinian Breinl ◽  
Hannes Müller-Thomy ◽  
Günter Blöschl
Keyword(s):  
Rain Gauge ◽  
Space Time ◽  
Convective Precipitation ◽  
Convective Activity ◽  
Block Kriging ◽  
Rain Gauge Data ◽  
Time Scaling ◽  
Statistical Behavior ◽  
Gauge Data ◽  
Reduction Factors

<p>We link areal reduction factors (ARFs, the ratio of annual maxima catchment precipitation and point precipitation) to the dominating precipitation mechanisms in Austria (84,000km²), using a new efficient method of estimating ARFs based on block kriging. A better understanding of the precipitation mechanisms help assess the plausibility of the ARFs estimated, but ARFs likewise contribute to a better understanding of the precipitation mechanisms as they are a fingerprint of the spatial statistical behavior of extreme precipitation. Our main focus is on two sub-regions in the West and East of Austria, dominated by stratiform and convective precipitation, respectively. ARFs are estimated using rain gauge data with hourly resolution across five durations. ARFs decay faster with increasing area in regions of pronounced convective activity than in regions dominated by stratiform processes. Low ARF values are linked to increased lightening activity (as a proxy for convective activity), but low ARFs can likewise occur in areas of reduced lightning activity as, in summer, convective precipitation can occur everywhere in the country. ARFs tend to decrease with increasing return period, possibly because the contribution of convective precipitation is higher. Our analysis is a key component towards a better understanding of the hydrometeorology in the region, as the process links of the ARFs relate to the space-time scaling of floods.</p>

Scaling law of static liquefaction mechanism in geocentrifuge and corresponding hydromechanical characterization of an unsaturated silty sand having a viscous pore fluid

2015 ◽  
Vol 52 (6) ◽  
pp. 708-720 ◽  
Author(s):  
Amin Askarinejad ◽  
Alexander Beck ◽  
Sarah M. Springman
Keyword(s):  
Pore Pressure ◽  
Scaling Laws ◽  
Scaling Law ◽  
Pore Fluid ◽  
Silty Sand ◽  
Excess Pore Pressure ◽  
Geotechnical Centrifuge ◽  
Time Scaling ◽  
Static Liquefaction ◽  
Viscous Solution

Fast landslides induced by rainfall impose considerable damage on infrastructure and cause major casualties worldwide. Static liquefaction is one of the triggering mechanisms mentioned frequently in the literature as a cause of this type of landslide. The scaling laws required to model this mechanism in the geotechnical centrifuge are developed, and it is shown that either a reduction in the soil pore size or use of a viscous pore fluid is needed to unify the time scaling factors of contractive volume change of the saturated voids and dissipation of the excess pore pressure generated. The latter option was used in this research; therefore, the influences of the viscous pore fluid on the hydromechanical characteristics of a silty sand were investigated. Subsequently, geocentrifuge tests were conducted to compare the behaviour of a slope having a viscous solution as the pore fluid with that of a model with water as the pore fluid. Both slopes were subjected to rainfall, and the evolution of the pore pressure and surface movements were monitored.

Dimensionality dependence of the Rayleigh–Taylor and Richtmyer–Meshkov instability late-time scaling laws

2001 ◽  
Vol 8 (6) ◽  
pp. 2883-2889 ◽  
Author(s):  
D. Oron ◽  
L. Arazi ◽  
D. Kartoon ◽  
A. Rikanati ◽  
U. Alon ◽  
...  
Keyword(s):  
Scaling Laws ◽  
Late Time ◽  
Time Scaling

scholarly journals On space-time scaling of cumulated rainfall fields

1998 ◽  
Vol 34 (12) ◽  
pp. 3461-3469 ◽  
Author(s):  
Ignacio Rodriguez-Iturbe ◽  
Marco Marani ◽  
Paolo D'Odorico ◽  
Andrea Rinaldo
Keyword(s):  
Space Time ◽  
Time Scaling
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