Integrated Analysis Framework for Predicting Surface Runoff, Infiltration, and Slope Stability

2014 ◽  
Author(s):  
J. Guan ◽  
C. M. Mok ◽  
A. T. Yeung
Keyword(s):  
Slope Stability ◽  
Surface Runoff ◽  
Integrated Analysis ◽  
Analysis Framework

Inferring hillslope response under seismic loading and rainfall: A case study from the SE Carpathian, Romania

2021 ◽  
Author(s):  
Vipin Kumar ◽  
Léna Cauchie ◽  
Anne-Sophie Mreyen ◽  
Philippe Cerfontaine ◽  
Mihai Micu ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Slope Stability ◽  
Surface Runoff ◽  
Dynamic Condition ◽  
Seismic Loading ◽  
Seismic Stability ◽  
Seismic Load ◽  
Stability Evaluation ◽  
Rainfall Events ◽  
Year 2000

<p>Seismic stability evaluation plays a crucial role in landslide disaster risk reduction. Related modeling also has to consider the potential influences of the rainfall on the hillslopes. This study aims at understanding the relative influence of the seismic loading and extreme cumulative rainfall on a massive active landslide in the seismically active Vrancea-Buzau region of the Romanian Carpathians (45° 30' 23" N, 26° 25' 05" E). This region has been subjected to more than 700 earthquakes (M>4) events with the highest magnitude of 7.2 (M<sub>w</sub>) during the year 1960-2019. Rainfall data of the year 2000-2019 revealed the occurrence of relatively intense rainfall events, especially during the last ten years. The landslide has an aerial dimension of ~9.1 million m². It hosts the small village of Varlaam at the toe along the Bisca River. The slope (with an average gradient of 15-20°) is covered by shrubs and scattered trees near its borders and is relatively barren in the central part. Shales with some intercalated sandstone layers belonging to the Miocene thrust belt constitute the rocks of the slope.   </p><p>A first survey involving the multi-station array and related Horizontal-to-Vertical noise Spectral Ratio (HVSR) measurements was completed in summer 2019. The findings of the HVSR were processed using the inversion process to infer the shear wave velocity distribution with depth and to detect the sliding surface of the landslide. These velocities were further used to estimate the geotechnical properties of the subsurface using the empirical equations. The HVSR based depth profiles and the Unmanned Air Vehicle based topographic information were used to take four 2D slope sections. These sections were considered for 2D discrete element modeling based stability evaluation under static and dynamic condition along with sensitivity analysis. Static simulation was used to determine the Factor of Safety (FS) using the shear strength reduction approach. Ricker wavelet was used as input seismic load in the dynamic simulation. Potential run-out and flow characteristics of the slope material were explored using the Voellmy rheology based RAMMS software. The relationship between rainfall, surface runoff, and soil moisture was also explored to understand the hydrogeological influence on slope stability.</p><p>Though the slope reveals meta-stability (1.0<FS<2.0) condition under static loading, displacement in the soil reaches up to 1.5 m that further increases to 2.8 m under dynamic loading. According to the topographic characteristics of the slope and to the presence of landslide material or intact bedrock near the surface, acceleration along the slope reaches a Peak Ground Acceleration in the range of 0.6 to 1.3g. Eight extreme rainfall events (>50mm/24 hours) during the year 2000-2019 are noted to temporally coincide with enhanced surface runoff and increased soil moisture in the region. Debris flow runout modeling indicated that the slope material may attain a maximum flow height and flow velocity of 13±0.8 m and 5±0.5 m/sec, respectively, along the river channel.</p><p><strong>Keywords: </strong>Landslide;<strong> </strong>Earthquake; Slope stability; Runout; SE Carpathian</p>

scholarly journals Integrated Analysis Method for Stability Analysis and Maintenance of Cut-Slope in Urban

2021 ◽  
Author(s):  
Mincheol Park ◽  
Heuisoo Han ◽  
Yoonhwa Jin
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Slope Failure ◽  
Slope Stability Analysis ◽  
Velocity Curve ◽  
Integrated Analysis ◽  
Cut Slope ◽  
Analysis Method ◽  
Cut Slopes ◽  
Inverse Velocity

In the process of constructing roads for the development of the city, cut-slopes are made by excavating mountains. However, these cut-slopes are degraded in strength by time-deterioration phenomenon, and progressive slope failure is caused. This study developed an integrated analysis method for stability analysis and maintenance of cut-slopes in urban. The slope stability analysis was performed using the finite element model, and the progressive slope failure by time-dependent deterioration was quantified by using the strength parameters of soil applying the strength reduction factor (SRF). The displacements until the slope failure by slope stability analysis were quantified by cumulative displacement curve, velocity curve, and inverse velocity curve and, applied to the slope maintenance method. The inverse-velocity curve applied to the prediction of the time of slope failure was regressed to the 1st linear equation in the brittle material and the 3rd polynomial equation in the ductile material. This is consistent with the proposed formula of Fukuzono and also shows similar behavior to the failure case in literature. In the future, integrated analysis method should be improved through additional research. And it should be applied to cut-slope to prevent disasters.

scholarly journals A Comprehensive Database and Analysis Framework To Incorporate Multiscale Data Types and Enable Integrated Analysis of Bioactive Polyphenols

2017 ◽  
Vol 15 (3) ◽  
pp. 840-850 ◽  
Author(s):  
Lap Ho ◽  
Haoxiang Cheng ◽  
Jun Wang ◽  
James E. Simon ◽  
Qingli Wu ◽  
...  
Keyword(s):  
Integrated Analysis ◽  
Analysis Framework ◽  
Data Types ◽  
Comprehensive Database

scholarly journals URBAN CONFIGURATION AND WATER BALANCE WITH AQUACYCLE MODEL IN THE BELÉM CATCHMENT, SOUTHERN BRAZIL

2021 ◽  
Vol 22 (79) ◽  
pp. 149-160
Author(s):  
Juliana Wilse Landolfi Teixeira de Carvalho ◽  
Irani Dos Santos
Keyword(s):  
Water Balance ◽  
Surface Runoff ◽  
Hydrological Cycle ◽  
Anthropogenic Activities ◽  
Linear Regression Analysis ◽  
Integrated Analysis ◽  
Impervious Surfaces ◽  
Southern Brazil ◽  
Water Balance Components ◽  
Linear Interaction

The influence of anthropogenic activities on drainage basins increases the complexity of hydrological systems in urban watersheds due to the increased amount of impervious surfaces and the interaction between natural and constructed drainage systems. Herein, the aim is to verify how water balance components respond to anthropogenic changes in different configurations of urban space. The study focuses on the Belém catchment, located in Curitiba, Southern Brazil city. Simulations were performed using the Aquacycle model to evaluate the water balance of fourteen Hydrologic Similarity Areas, which were delimited based on the integrated analysis of zoning law, and demographic density data. The results show a direct and linear interaction between an increase in impervious areas with an increase in surface runoff and decreases in infiltration and evapotranspiration, demonstrating the relationship among urban configuration and components of hydrological cycle. Linear regression analysis indicates R² of 0.986 between impervious surfaces and surface runoff, 0.956 for evapotranspiration and 0.934 for groundwater recharge. However, streamflow and baseflow parameters showed no sensitivity to the percentage of impervious surfaces, with R² 0.557 and 0.244, respectively. Finally, the results indicate a significant contribution to the water balance resulting from water-supply system leakage and wastewater discharge into the drainage system.

A Novel Modeling Method for C4ISR Effectiveness Requirements

2015 ◽  
Vol 713-715 ◽  
pp. 1520-1524
Author(s):  
Qing Chao Dong ◽  
Yu Dong Qi ◽  
Wei Chao Si ◽  
Qing Hua Chen
Keyword(s):  
Modeling Method ◽  
Effectiveness Evaluation ◽  
Integrated Analysis ◽  
Evaluation Function ◽  
Analysis Framework ◽  
Meta Model ◽  
Requirements Modeling ◽  
Uml Modeling ◽  
Modeling Paradigm ◽  
C4isr System

Effectiveness requirements for C4ISR system is difficult to capture and model, due to the fact that the effectiveness requirements may contain certain and uncertain requirements concepts. To solve the problem, the paper suggests a capability meta model which can define both functional and effectiveness features of the requirements. The UML modeling paradigm is extended by introducing fuzzy modeling constructs so as to describe fuzzy concepts of the effectiveness requirements. An Effectiveness Evaluation Function (EEF) based on Bézier curves is introduced to predict the effectiveness of systems. Compared with the existing requirements modeling approaches, the method enables an integrated analysis framework of functional and effectiveness requirements.

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