Analysis of Average Rainfall Super Cyclone by using Double Integration Technique

Evidence is given of the distribution of pre-warm front rainfall at the meso-γ scale, together with a discussion of the main mechanisms producing this variability. An inland region in the Mediterranean area is considered. The selected rainfall type is commonly considered the most regular inasmuch as it is usually unaffected by extended convective motions. Despite this, within a storm a large variability in space was observed. For 90% of measurements, the typical deviations from the area-average total depth ranged from - 40 to 60 % and the storm ensemble-average rainfall rate over an hilly zone was 60 % greater than that in a contiguous low-land zone generally placed upwind. This variability is largely explained in terms of forced uplift of air mass over an envelope type orography. For a few storms smaller orographic effects were found in locations influenced by an orography with higher slopes and elevations. This feature is ascribed to the compact structure of these mountains which probably determines a deflection of air mass in the boundary layer. The importance of this type of analysis in the hydrological practice is also emphasized.

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Analysis of the Aortic Influence on the Impedance Cardiography Signal by a Simple Model using Finite Integration Technique

SNE Simulation Notes Europe ◽

10.11128/sne.20.sn.09977 ◽

2010 ◽

Vol 20 (2) ◽

pp. 51-54

Author(s):

Mark Ulbrich ◽

Alexander Schauermann ◽

Steffen Leonhardt

Keyword(s):

Simple Model ◽

Impedance Cardiography ◽

Integration Technique ◽

Finite Integration Technique

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Real-time Approximation of Photometric Polygonal Lights

Proceedings of the ACM on Computer Graphics and Interactive Techniques ◽

10.1145/3384537 ◽

2020 ◽

Vol 3 (1) ◽

pp. 1-18

Author(s):

Christian Luksch ◽

Lukas Prost ◽

Michael Wimmer

Keyword(s):

Real Time ◽

Specular Reflection ◽

Near Field ◽

Measurement Data ◽

Data Sets ◽

Photometric Measurement ◽

Integration Technique ◽

Time Approximation ◽

Light Emitter ◽

Selection Of

We present a real-time rendering technique for photometric polygonal lights. Our method uses a numerical integration technique based on a triangulation to calculate noise-free diffuse shading. We include a dynamic point in the triangulation that provides a continuous near-field illumination resembling the shape of the light emitter and its characteristics. We evaluate the accuracy of our approach with a diverse selection of photometric measurement data sets in a comprehensive benchmark framework. Furthermore, we provide an extension for specular reflection on surfaces with arbitrary roughness that facilitates the use of existing real-time shading techniques. Our technique is easy to integrate into real-time rendering systems and extends the range of possible applications with photometric area lights.

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A Study on Urban Inundation Using SWMM in Busan, Korea, Using Existing Dams and Artificial Underground Waterways

Water ◽

10.3390/w13121708 ◽

2021 ◽

Vol 13 (12) ◽

pp. 1708

Author(s):

Yeon-Moon Choo ◽

Sang-Bo Sim ◽

Yeon-Woong Choe

Keyword(s):

Climate Change ◽

Urban Areas ◽

Flood Damage ◽

Virtual Model ◽

Sustainable Cities ◽

Annual Average ◽

New Methods ◽

Average Rainfall ◽

Reduction Methods ◽

Urbanized Areas

The annual average rainfall in Busan area is increasing, causing frequent flooding of Busan’s Suyeong and Oncheon rivers. Due to the increase in urbanized areas and climate change, it is difficult to reduce flood damage. Therefore, new methods are needed to reduce urban inundation. This study models the effects of three flood reduction methods involving Oncheon River, Suyeong River, and the Hoedong Dam, which is situated on the Suyeong. Using EPA-SWMM, a virtual model of the dam and the rivers was created, then modified with changes to the dam’s height, the installation of a floodgate on the dam, and the creation of an underground waterway to carry excess flow from the Oncheon to the Hoedong Dam. The results of this study show that increasing the height of the dam by 3 m, 4 m, or 6 m led to a 27%, 37%, and 48% reduction in flooding, respectively, on the Suyeong River. It was also found that installing a floodgate of 10 × 4 m, 15 × 4 m, or 20 × 4 min the dam would result in a flood reduction of 2.7% and 2.9%, respectively. Furthermore, the construction of the underground waterway could lead to an expected 25% flood reduction in the Oncheon River. Measures such as these offer the potential to protect the lives and property of citizens in densely populated urban areas and develop sustainable cities and communities. Therefore, the modifications to the dam and the underground waterway proposed in this study are considered to be useful.

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