scholarly journals Moraine-dammed lake distribution and outburst flood risk in the Chinese Himalaya

2015 ◽  
Vol 61 (225) ◽  
pp. 115-126 ◽  
Author(s):  
Wang Shijin ◽  
Qin Dahe ◽  
Xiao Cunde
Keyword(s):  
Remote Sensing Data ◽  
Disaster Risk ◽  
Eastern Himalaya ◽  
Analytic Hierarchy ◽  
Adaptation Capacity ◽  
Comprehensive Method ◽  
Outburst Floods ◽  
Glacial Lake Outburst Floods ◽  
Hierarchy Process ◽  
County Scale

AbstractTo better understand the risk of disasters due to glacial lake outburst floods (GLOFs), we synthetically analyze the spatial distribution and evolution of moraine-dammed lakes and potentially dangerous glacial lakes (PDGLs) in the Chinese Himalaya. Our county-based assessment of GLOF disaster risk combines PDGL outburst hazard, regional exposure, vulnerability of exposed elements and adaptation capability (risk management) using the analytic hierarchy process. We synthetically analyze the disaster risk using the weighted comprehensive method. Remote-sensing data show there are 329 moraine-dammed lakes (>0.02 km2; total area 125.43 km2) in the Chinese Himalaya, of which 116 (total area 49.49 km2) are identified as PDGLs. The zones at highest risk of GLOF disaster are mainly located in Nyalam, Tingri, Dinggyê, Lhozhag, Kangmar and Zhongba, in the mid-eastern Himalaya. Lowest-risk zones are located in the eastern Himalaya. On the county scale, Lhozhag and Lhunze have the highest hazard degrees and exposure, while Zhongba and Zando have the highest degree of vulnerability and lowest adaptation capacity. Our regionalization results for GLOF disaster risk are consistent with the distribution of historical disaster sites across the Chinese Himalaya.

scholarly journals Glacial lake change risk and management on the Chinese Nyainqentanglha in the past 40 years

2016 ◽  
Author(s):  
Wang Shijin
Keyword(s):  
Lake Area ◽  
Glacial Lakes ◽  
Analytic Hierarchy ◽  
Adaptation Capacity ◽  
Comprehensive Method ◽  
Outburst Floods ◽  
Integrated Risk ◽  
Lake Change ◽  
Hierarchy Process ◽  
County Scale

Abstract. The paper analyzed synthetically spatial distribution and evolution status of moraine-dammed lakes in the Nyainqentanglha Mountain, revealed risk degree of county-based potential dangerous glacial lakes (PDGLs) outburst floods disaster by combining PDGLs outburst hazard, regional exposure, vulnerability of exposed elements and adaptation capability and using the Analytic Hierarchy Process and Weighted Comprehensive Method. The results indicate that 132 moraine-dammed lakes (> 0.02 km2) with a total area of 38.235 km2 were detected in the Nyainqentanglha in the 2010s, the lake number decreased only by 5 %, whereas total lake area expanded by 22.72 %, in which 54 lakes with a total area of 17.53 km2 are identified as PDGLs and total area increased by 144.31 %, higher significantly than 4.06 % of non-PDGLs. The zones at very high and high integrated risk of glacial lakes outburst floods (GLOFs) disaster are concentrated in the eastern Nyainqentanglha, whereas low and very low integrated risk zones are located mainly in the western Nyainqentanglha. On the county scale, Nagque and Nyingchi have the lowest hazard risk, Banbar has the highest hazard and vulnerability risk, Sog and Lhorong have the highest exposure risk. In contrast, Biru and Jiali have the highest vulnerability risk, while Gongbo'gyamda and Damxung have lowest adaptation capacity. The regionalization results for GLOF disaster risk in the study are consistent with the distribution of historical disaster sites across the Nyainqentanglha.

A Disaster Risk Management Performance Index to Assess Safety and Security in Industrial Plants

2016 ◽  
Vol 841 ◽  
pp. 373-378 ◽  
Author(s):  
Fabio de Felice ◽  
Antonella Petrillo ◽  
Federico Zomparelli
Keyword(s):  
Risk Management ◽  
Performance Index ◽  
Integrated Approach ◽  
Disaster Risk ◽  
Disaster Risk Management ◽  
Management Performance ◽  
Analytic Hierarchy ◽  
Industrial Plants ◽  
Hierarchy Process

The goal of the research is to present an integrated approach that combines multi criteria analysis and disaster and emergency management. The study is based on a well know multi criteria technique, the Analytic Hierarchy Process (AHP). An AHP model is proposed in order to define a Disaster Risk Management Performance Index (DRMPI) that quantifies the performance and effectiveness of risk management to evaluate emergency alternative problems. This model is implemented in a real case study.

scholarly journals Moraine-dammed lake failures in Patagonia and assessment of outburst susceptibility in the Baker Basin

2014 ◽  
Vol 2 (7) ◽  
pp. 4765-4812
Author(s):  
P. Iribarren Anacona ◽  
K. P. Norton ◽  
A. Mackintosh
Keyword(s):  
Classification Scheme ◽  
Critical Infrastructure ◽  
Ice Age ◽  
Short Term ◽  
Conditioning Factors ◽  
First Order ◽  
Outburst Floods ◽  
Glacial Lake Outburst Floods ◽  
Hierarchy Process ◽  
Very High

Abstract. Glacier retreat since the Little Ice Age has resulted in the development or expansion of hundreds of glacial lakes in Patagonia. Some of these lakes have produced large (≥106 m3) Glacial Lake Outburst Floods (GLOFs) damaging inhabited areas. GLOF hazard studies in Patagonia have been mainly based on the analysis of short-term series (≤50 years) of flood data and until now no attempt has been made to identify the relative susceptibility of lakes to failure. Power schemes and associated infrastructure are planned for Patagonian basins that have historically been affected by GLOFs, and we now require a thorough understanding of the characteristics of dangerous lakes in order to assist with hazard assessment and planning. In this paper, the conditioning factors of 16 outbursts from moraine dammed lakes in Patagonia were analysed. These data were used to develop a classification scheme designed to assess outburst susceptibility, based on image classification techniques, flow routine algorithms and the Analytical Hierarchy Process. This scheme was applied to the Baker Basin, Chile, where at least 7 moraine-dammed lakes have failed in historic time. We identified 386 moraine-dammed lakes in the Baker Basin of which 28 were classified with high or very high outburst susceptibility. Commonly, lakes with high outburst susceptibility are in contact with glaciers and have moderate (>8°) to steep (>15°) dam outlet slopes, akin to failed lakes in Patagonia. The proposed classification scheme is suitable for first-order GLOF hazard assessments in this region. However, rapidly changing glaciers in Patagonia make detailed analysis and monitoring of hazardous lakes and glaciated areas upstream from inhabited areas or critical infrastructure necessary, in order to better prepare for hazards emerging from an evolving cryosphere.

scholarly journals Moraine-dammed lake failures in Patagonia and assessment of outburst susceptibility in the Baker Basin

2014 ◽  
Vol 14 (12) ◽  
pp. 3243-3259 ◽  
Author(s):  
P. Iribarren Anacona ◽  
K.P. Norton ◽  
A. Mackintosh
Keyword(s):  
Classification Scheme ◽  
Critical Infrastructure ◽  
Ice Age ◽  
Short Term ◽  
Conditioning Factors ◽  
First Order ◽  
Outburst Floods ◽  
Glacial Lake Outburst Floods ◽  
Hierarchy Process ◽  
Very High

Abstract. Glacier retreat since the Little Ice Age has resulted in the development or expansion of hundreds of glacial lakes in Patagonia. Some of these lakes have produced large (≥ 106 m3) Glacial Lake Outburst Floods (GLOFs) damaging inhabited areas. GLOF hazard studies in Patagonia have been mainly based on the analysis of short-term series (≤ 50 years) of flood data and until now no attempt has been made to identify the relative susceptibility of lakes to failure. Power schemes and associated infrastructure are planned for Patagonian basins that have historically been affected by GLOFs, and we now require a thorough understanding of the characteristics of dangerous lakes in order to assist with hazard assessment and planning. In this paper, the conditioning factors of 16 outbursts from moraine-dammed lakes in Patagonia were analysed. These data were used to develop a classification scheme designed to assess outburst susceptibility, based on image classification techniques, flow routine algorithms and the Analytical Hierarchy Process. This scheme was applied to the Baker Basin, Chile, where at least seven moraine-dammed lakes have failed in historic time. We identified 386 moraine-dammed lakes in the Baker Basin of which 28 were classified with high or very high outburst susceptibility. Commonly, lakes with high outburst susceptibility are in contact with glaciers and have moderate (> 8°) to steep (> 15°) dam outlet slopes, akin to failed lakes in Patagonia. The proposed classification scheme is suitable for first-order GLOF hazard assessments in this region. However, rapidly changing glaciers in Patagonia make detailed analysis and monitoring of hazardous lakes and glaciated areas upstream from inhabited areas or critical infrastructure necessary, in order to better prepare for hazards emerging from an evolving cryosphere.

scholarly journals Observed and simulated winter temperature over Gurudongmar area, North Sikkim, India

MAUSAM ◽  
2021 ◽  
Vol 71 (1) ◽  
pp. 115-124
Author(s):  
BARAT ARCHISMAN ◽  
SARTHI P PARTH ◽  
KUMAR SUNNY ◽  
KUMAR PRAVEEN ◽  
SINHA ASHUTOSH K
Keyword(s):  
Global Warming ◽  
Surface Air Temperature ◽  
Eastern Himalaya ◽  
Future Time ◽  
Cold Desert ◽  
Time Period ◽  
Outburst Floods ◽  
Glacial Lake Outburst Floods ◽  
Future Time Period ◽  
Area North

The global warming and its impact on the cryosphere is a matter of serious concern. The Sikkim and the Eastern Himalaya are a canvas of vivid landscapes and of different climate zones. The study of cryosphere needs more attention on long term climatic trends of surface air temperature. The Gurudongmar area is very much important because this area is surrounded by glaciers and as well as cold desert and TsoLhamo Lake nearby. The Gurudongmar lake (located at an altitude of 17,800 ft) has been studied by several researchers in the context of Glacial Lake Outburst Floods (GLOFs) and reported a high risk lake which is being largely affected by global warming and climate change. The present study is aimed to investigate the trend of temperature in recent past and in future time periods over the study area of Sikkim. The observed and model’s simulated gridded temperature data is considered to inkling of rising trend in winter months of December-January-February (DJF) over the study area. An increase in temperature is found for the future time period. This can be linked to the increasing hazard risk and change in local cryosphere environment.

Study of Transportation Corridor of the Dangerous Mountainous Areas Based on GIS

2014 ◽  
Vol 644-650 ◽  
pp. 1338-1341
Author(s):  
Rong Huai Chen ◽  
Xue Xian Chen ◽  
Ying Gao ◽  
Teng Zhao
Keyword(s):  
Wide Distribution ◽  
Disaster Risk ◽  
Risk Level ◽  
Geological Hazards ◽  
Mountainous Areas ◽  
Analytic Hierarchy ◽  
Transportation Corridor ◽  
Traffic Corridor ◽  
The Given ◽  
Hierarchy Process

As the geological hazards in mountainous areas in Southwest of China has the characteristic of different varieties, wide distribution and great harm. So, it is important to conduct the roads in scientific and rational method under the changing environment, especially to choose the traffic corridor with lower risk. In this paper, including the contents of analyzing the factors which influence the disaster risk and using the analytic hierarchy process with GIS spatial analysis to evaluate the disaster risk level of the mountainous areas of the traffic corridor under the given example-Sichuan-Tibet Railway from Changdu to Kangding.

Study on Applicability of Weighted Method for Indexes to Evaluate the Base-System of Water in Naolihe Catchment

2014 ◽  
Vol 1030-1032 ◽  
pp. 609-615
Author(s):  
Zhen Xiang Xing ◽  
Jing Li ◽  
Shu Hua Dong ◽  
Dan Lou ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Analytic Hierarchy Process ◽  
Evaluation Method ◽  
Base System ◽  
Analytic Hierarchy ◽  
Comprehensive Method ◽  
The Analytic Hierarchy Process ◽  
Entropy Weighted ◽  
Hierarchy Process ◽  
Coefficient Method ◽  
Better Than

In order to study the applicability of different weighted methods for indexes to evaluate the health status of basin. The base-system of water theory was introduced, which was used to evaluate the health status of Naolihe catchment. The analytic hierarchy process, entropy weighted method and the variation coefficient method were adopted to calculate the weight of indexes in the base-system of water. The analytic hierarchy process belongs to subjective evaluation method and the other two methods belong to objective evaluation method. Two of the three methods above were joined together, which was called a comprehensive method. In this paper, the three single methods and two comprehensive methods were adopted to calculate indexes’ weights of the base-system of water. The case study results showed that the single analytic hierarchy process was better than the other two single methods and the two comprehensive methods were better than the three single methods. In addition, the comprehensive method 1 (the analytic hierarchy process + entropy weighted method) was better than the comprehensive method 2 (the analytic hierarchy process + the variation coefficient method).

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