scholarly journals Co-detection of micro seismic activity as early warning of gravitational slope failure

2018 ◽  
Author(s):  
Jérome Faillettaz ◽  
Martin Funk ◽  
Jan Beutel ◽  
Andreas Vieli
Keyword(s):  
Early Warning ◽  
Slope Failure ◽  
Low Cost ◽  
Acoustic Emissions ◽  
Early Warning Systems ◽  
Simple Method ◽  
Distributed Sensors ◽  
Simple Strategy ◽  
New Strategy ◽  
Co Detection

Abstract. We developed a new strategy for Disaster Risk Reduction for gravitational slope failure: We propose a simple method for real-time early warning of gravity-driven failures that considers and exploits both the heterogeneity of natural media and characteristics of acoustic emissions attenuation. This method capitalizes on co-detection of elastic waves emanating from micro-cracks by a network of multiple and spatially distributed sensors. Event co-detection is considered as surrogate for large event size with more frequent co-detected events marking imminence of catastrophic failure. In this study we apply this method to a steep rock glacier/debris slope and demonstrate the potential of this simple strategy for real world cases, i.e. at slope scale. This low cost, robust and autonomous system provides a well adapted alternative/complementary solution for Early Warning Systems.

scholarly journals Towards early warning of gravitational slope failure with co-detection of microseismic activity: the case of an active rock glacier

2019 ◽  
Vol 19 (7) ◽  
pp. 1399-1413 ◽  
Author(s):  
Jérome Faillettaz ◽  
Martin Funk ◽  
Jan Beutel ◽  
Andreas Vieli
Keyword(s):  
Early Warning ◽  
Slope Failure ◽  
Acoustic Emissions ◽  
Warning System ◽  
Heterogeneous Material ◽  
Rock Glacier ◽  
Simple Method ◽  
Distributed Sensors ◽  
New Strategy ◽  
Co Detection

Abstract. We developed a new strategy for disaster risk reduction for gravitational slope failure: we propose validating on a case study a simple method for real-time early warning of gravity-driven failures that considers and exploits both the heterogeneity of natural media and characteristics of acoustic emissions attenuation. This method capitalizes on co-detection of elastic waves emanating from micro-cracks by a network of multiple and spatially distributed sensors. Event co-detection is considered to be surrogate for large event size with more frequent co-detected events marking imminence of catastrophic failure. In this study we apply this general method to a steep active rock glacier, a natural heterogeneous material sharing all relevant properties of gravitational slope failure, and demonstrate the potential of this simple strategy for real world cases, i.e., at slope scale. This new strategy being theoretically valid for all types of failures, it constitutes a first step towards the development of a new early warning system for gravitational slope failure.

scholarly journals Innovative Monitoring Tools and Early Warning Systems for Risk Management: A Case Study

Geosciences ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 62 ◽  
Author(s):  
Andrea Segalini ◽  
Andrea Carri ◽  
Alessandro Valletta ◽  
Maurizio Martino
Keyword(s):  
Monitoring System ◽  
Early Warning ◽  
Slope Failure ◽  
Central Italy ◽  
Early Warning Systems ◽  
Critical Event ◽  
Warning Systems ◽  
Automatic Data ◽  
Area Of Interest

During recent years, the availability of innovative monitoring instrumentation has been a fundamental component in the development of efficient and reliable early warning systems (EWS). In fact, the potential to achieve high sampling frequencies, together with automatic data transmission and elaboration are key features for a near-real time approach. This paper presents a case study located in Central Italy, where the realization of an important state route required a series of preliminary surveys. The monitoring system installed on site included manual inclinometers, automatic modular underground monitoring system (MUMS) inclinometers, piezometers, and geognostic surveys. In particular, data recorded by innovative instrumentation allowed for the detection of major slope displacements that ultimately led to the landslide collapse. The implementation of advanced tools, featuring remote and automatic procedures for data sampling and elaboration, played a key role in the critical event identification and prediction. In fact, thanks to displacement data recorded by the MUMS inclinometer, it was possible to forecast the slope failure that was later confirmed during the following site inspection. Additionally, a numerical analysis was performed to better understand the mechanical behavior of the slope, back-analyze the monitored event, and to assess the stability conditions of the area of interest.

Community Based Flash Flood Early Warning System: a Low-cost Technology for Nepalese Mountains

2018 ◽  
pp. 87-92
Author(s):  
Basanta Raj Adhikari ◽  
Nagendra Raj Sitoula
Keyword(s):  
Operating System ◽  
Early Warning ◽  
Flash Flood ◽  
Low Cost ◽  
Warning System ◽  
Early Warning Systems ◽  
Ultrasonic Sensor ◽  
Environmental Cost ◽  
High Tech ◽  
Processing Unit

Every year, flood impose substantial economic, social and environmental cost on Nepalese community through direct damage to residential, commercial, educational and structures. Moreover, the flood destroys animal farm, commercial stock and records and other content of the building and pollutes the water. Early Warning Systems are important to save such lives and properties which involves computer, satellite data and high accurate operating system but this system is very costly in terms of installation as well as operation and maintenance leading to hindrance in the sustainability of the system. However, high-tech technology is very expensive and not feasible in Nepal and therefore low-cost and easy operating system is needed in the rural parts of Nepal. The system includes Solar panel, Siren, Ultrasonic sensor, processing unit, and battery. The ultrasonic sensor sense water level and the siren will automatically start. The threshold can be set up according to the space and time. Bulletin of Department of Geology, vol. 20-21, 2018, pp: 87-92

scholarly journals Forecasting and communication key elements for low-cost fluvial flooding early warning system in urban areas

2021 ◽  
Vol 11 (5) ◽  
pp. 4143
Author(s):  
Melisa Acosta-Coll ◽  
Andres Solano-Escorcia ◽  
Lilia Ortega-Gonzalez ◽  
Ronald Zamora-Musa
Keyword(s):  
Power Consumption ◽  
Early Warning ◽  
Urban Areas ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Communication Protocols ◽  
Warning System ◽  
Early Warning Systems ◽  
High Energy ◽  
The Difference

Fluvial flooding occurs when a river overspills its banks due to excessive rainfall, and it is the most common flood event. In urban areas, the increment of urbanization makes communities more susceptible to fluvial flooding since the excess of impervious surfaces reduced the natural permeable areas. As flood prevention strategies, early warning systems (EWS) are used to reduce damage and protect people, but key elements need to be selected. This manuscript proposes the monitoring instruments, communication protocols, and media to forecast and disseminate EWS alerts efficiently during fluvial floods in urban areas. First, we conducted a systematic review of different EWS architectures for fluvial floods in urban areas and identified that not all projects monitor the most important variables related to the formation of fluvial floods and most use communication protocols with high-energy consumption. ZigBee and LoRaWAN are the communication protocols with lower power consumption from the review, and to determine which technology has better performance in urban areas, two wireless sensor networks were deployed and simulated in two urban areas susceptible to fluvial floods using Radio Mobile software. The results showed that although Zigbee technology has better-received signal strength, the difference with LoRAWAN is lower than 2 dBm, but LoRaWAN has a better signal-to-noise ratio, power consumption, coverage, and deployment cost.

scholarly journals Brief communication: The role of geophysical imaging in local landslide early warning systems

2021 ◽  
Author(s):  
Jim Scott Whiteley ◽  
Arnaud Watlet ◽  
Jonathan Michael Kendall ◽  
Jonathan Edward Chambers
Keyword(s):  
Remote Sensing ◽  
Early Warning ◽  
Slope Failure ◽  
Time Lapse ◽  
Early Warning Systems ◽  
Warning Systems ◽  
Geophysical Monitoring ◽  
Landslide Early Warning ◽  
Geophysical Imaging

Abstract. We summarise the contribution of geophysical imaging to local landslide early warning systems (LoLEWS), highlighting how LoLEWS design and monitoring components benefit from the enhanced spatial and temporal resolutions of time-lapse geophysical imaging. In addition, we discuss how with appropriate laboratory-based petrophysical transforms, these geophysical data can be crucial for future slope failure forecasting and modelling, linking other methods of remote sensing and intrusive monitoring across different scales. We conclude that in light of ever increasing spatiotemporal resolutions of data acquisition, geophysical monitoring should be a more widely considered technology in the toolbox of methods available to stakeholders operating LoLEWS.

scholarly journals Brief communication: The role of geophysical imaging in local landslide early warning systems

2021 ◽  
Vol 21 (12) ◽  
pp. 3863-3871
Author(s):  
Jim S. Whiteley ◽  
Arnaud Watlet ◽  
J. Michael Kendall ◽  
Jonathan E. Chambers
Keyword(s):  
Remote Sensing ◽  
Early Warning ◽  
Slope Failure ◽  
Time Lapse ◽  
Early Warning Systems ◽  
Warning Systems ◽  
Geophysical Monitoring ◽  
Landslide Early Warning ◽  
Geophysical Imaging

Abstract. We summarise the contribution of geophysical imaging to local landslide early warning systems (LoLEWS), highlighting how the design and monitoring components of LoLEWS benefit from the enhanced spatial and temporal resolutions of time-lapse geophysical imaging. In addition, we discuss how with appropriate laboratory-based petrophysical transforms, geophysical data can be crucial for future slope failure forecasting and modelling, linking other methods of remote sensing and intrusive monitoring across different scales. We conclude that in light of ever-increasing spatiotemporal resolutions of data acquisition, geophysical monitoring should be a more widely considered technology in the toolbox of methods available to stakeholders operating LoLEWS.

MEMS Accelerometer Mini-Array (MAMA): A Low-Cost Implementation for Earthquake Early Warning Enhancement

2019 ◽  
Vol 35 (1) ◽  
pp. 21-38 ◽  
Author(s):  
Ran N. Nof ◽  
Angela I. Chung ◽  
Horst Rademacher ◽  
Lori Dengler ◽  
Richard M. Allen
Keyword(s):  
Early Warning ◽  
Microelectromechanical Systems ◽  
Low Cost ◽  
Early Warning Systems ◽  
Earthquake Early Warning ◽  
Mems Accelerometer ◽  
Minimum Number ◽  
Back Azimuth ◽  
Time Required ◽  
Prohibitive Cost

Earthquake Early Warning Systems (EEWS) are often challenged when the earthquakes occur outside the seismic network or where the station density is sparse. In these situations, poor locations and large alert delays are more common because of the limited azimuthal coverage and the time required for the wavefield to reach the minimum number of seismic stations to issue an alert. Seismic arrays can be used to derive the directivity of the wavefield and obtain better location. However, they are uncommon because of the prohibitive cost of the sensors. Here, we propose the development of an array-based approach using mini-arrays of low-cost Microelectromechanical Systems (MEMS) accelerometers and show how they can be used to improve EEWS. In this paper, we demonstrate this approach using data from two MEMS Accelerometer Mini-Arrays (MAMA) deployed at University of California Berkeley and Humboldt State University. We use a new low-cost ( <U.S. $150) Data Acquisition Unit and solve for the back azimuth of seven events with magnitudes ranging from Mw 2.7 to 5.1 at distances of 5 km to 106 km.

scholarly journals A Study on the Slope Failure Monitoring of a Model Slope by the Application of a Displacement Sensor

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Sungyong Park ◽  
Hyuntaek Lim ◽  
Bibek Tamang ◽  
Jihuan Jin ◽  
Seungjoo Lee ◽  
...  
Keyword(s):  
Real Time ◽  
Early Warning ◽  
Slope Failure ◽  
Early Warning Systems ◽  
Displacement Sensor ◽  
Scale Model ◽  
Economic Losses ◽  
Real Time Monitoring ◽  
Landslide Occurrence ◽  
Model Slope

Many causalities and economic losses are caused by natural disasters, such as landslides and slope failures, every year. This suggests that there is a need for an early warning system to mitigate casualties and economic losses. Most of the studies on early warning systems have been carried out by predicting landslide-prone areas, but studies related to the prediction of landslide occurrence time points by the real-time monitoring of slope displacement are still insufficient. In this study, a displacement sensor and an Internet of Things (IoT) monitoring system were combined together, to monitor slope failure through cutting experiments of a real-scale model slope. Real-time monitoring of the slope movement was performed simultaneously via a low-cost, efficient, and easy-to-use IoT system. Based on the obtained displacement data, an inverse displacement analysis was performed. Finally, a slope instrumentation standard was proposed based on the slope of the inverse displacement for early evacuation before slope failure.

scholarly journals Flood disaster indicator of water level monitoring system

2019 ◽  
Vol 9 (3) ◽  
pp. 1694 ◽  
Author(s):  
Wan Haszerila Wan Hassan ◽  
Aiman Zakwan Jidin ◽  
Siti Asma Che Aziz ◽  
Norain Rahim
Keyword(s):  
Water Level ◽  
Mobile Communications ◽  
Early Warning ◽  
Low Cost ◽  
Warning System ◽  
Early Warning Systems ◽  
Flood Management ◽  
Short Message ◽  
Alert Message ◽  
Message Service

The early warning systems for flood management have been developed rapidly with the growth of technologies. These system help to alert people early with the used of Short Message Service (SMS) via Global System for Mobile Communications (GSM). This paper presents a simple, portable and low cost of early warning system using Arduino board, which is used to control the whole system and GSM shields to send the data. System has been designed and implemented based on two components which is hardware and software. The model determines the water level using float switch sensors, then it analyzes the collected data and determine the type of danger present. The detected level is translated into an alert message and sent to the user. The GSM network is used to connect the overall system units via SMS.

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