40 Result(s)
within
Article
Fangqiang Wei
English
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Article
Method and its application of the momentum model for debris flow risk zoning
In order to ascertain the distribution of flow depth and velocity of debris flow, the combination of numerical modeling and the GIS technology has been used to simulate the movement process of debris flow out ...
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Grain composition and erosive equilibrium of debris flows
Debris flows consist of grains of various sizes ranging from 10−6 m ∼ 1 m. Field observations in the Jiangjia Gully (JJG) and other sites throughout China indicate that the grain size distribution of sediment in ...
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Distribution regularity of debris flow and its hazard in upper reaches of Yangtze River and other rivers of southwestern China
In the upper reaches of Yangtze River and other rivers of southwestern China, the debris flows develop and lead to most serious disasters because of the various landforms, complex geological structures and abu...
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The response of debris-flow events to solar proton flares (I)
By analyzing the observation data from Dongchuan Debris Flow Observation and Research Station and historical data from year 1965 to 1990 gotten from National Astronomical Observatories/ Yunnan Observatory, the...
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Soil organic carbon loss under different slope gradients in loess hilly region
Based on field runoff plots observation and sample analysis, the effect of slope gradient on soil organic carbon loss was studied under natural rainfall conditions in loess hilly region. The results showed tha...
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Regional prediction of impending debris flow based on Doppler weather radar
Debris flow prediction is one of the important means to reduce the loss caused by debris flow. This paper built a regional prediction model of impending debris flow based on regional environmental background (...
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Comparison of drought-resistance about three wild rocky-grasses
In this experiment, using the methods of drought-stress in the pot and PEG simulative drought-stress, three native rockyslope grasses Pogonatherum panideum(Lam.) Hack, Erioophorum comosum needs and Cynodon dactyl...
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Relationships between debris flows and earth surface factors in Southwest China
Southwest China, including the Provinces of Yunnan, Guizhou, Sichuan and Chongqing, is a region with serious debris flow hazards, where 7,561 debris flow sites have been identified. Based on the data from thes...
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Annual risk assessment on high-frequency debris-flow fans
An empirical model of debris-flow risk assessment is developed to estimate annual loss ratio on high-frequency debris-flow fans where more than one hazard events occur every year. Based on observations of debr...
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Measuring the internal velocity of debris flows using impact pressure detecting in the flume experiment
Measuring the internal velocity of debris flows is very important for debris flow dynamics research and designing debris flow control works. However, there is no appropriate method for measuring the internal v...
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Property insurance against debris-flow disasters based on risk assessment and the principal–agent theory
Dongchuan City is highly threatened by debris-flow disasters originating from Shengou gully, a typical debris-flow gully along **aojiang River in Yunnan Province (Kang et al. 2004). Shengou gully is studied, and ...
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RETRACTED ARTICLE: Distribution characteristics of debris flows and landslides in Three Parallel Rivers Area
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A model of debris flow forecast based on the water-soil coupling mechanism
Debris flow forecast is an important means of disaster mitigation. However, the accuracy of the statistics-based debris flow forecast is unsatisfied while the mechanism-based forecast is unavailable at the wat...
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Mean velocity estimation of viscous debris flows
The mean velocity estimation of debris flows, especially viscous debris flows, is an important part in the debris flow dynamics research and in the design of control structures. In this study, theoretical equa...
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A new water–sediment separation structure for debris flow defense and its model test
Structural measures, such as the commonly used open dam with a water–sediment separation function, are important in the mitigation of debris flow hazards and disasters. However, the existing open dams often lo...
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A seismically triggered landslide dam in Honshiyan, Yunnan, China: from emergency management to hydropower potential
At 16:30 (Bei**g time) on August 3rd, 2014, an Ms 6.5 earthquake occurred in Ludian County in Yunnan Province, China. The Ludian earthquake triggered a collapse in Cha**zi, right bank of the Niulanjiang Riv...
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Calculation of the separation grid design length in a new water–sediment separation structure for debris flow defense
A new water–sediment separation structure with a herringbone separation grid has been developed for debris flow defense. Previous model experiments showed that, compared to existing structures, this structure ...
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Can laparoscopic liver resection provide a favorable option for patients with large or multiple intrahepatic cholangiocarcinomas?
The role of laparoscopic liver resection (LLR) for large or multiple intrahepatic cholangiocarcinomas (ICCs) remains equivocal. The main concerns are potential risks of inadequate resection margin, tumor ruptu...
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Modeling potential scenarios of the Tangjiashan Lake outburst and risk assessment in the downstream valley
This research is devoted to Tangjiashan Lake, a quake landslide-dammed lake, situated in Sichuan Province, China, which was formed by a landslide triggered by the Wenchuan Earthquake on 12 May 2008. A STREAM_2...
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Visualized localization and tracking of debris flow movement based on infrasound monitoring
During the initiation and movement of debris flow, low frequency infrasound is generated and emitted with characteristics such as strong penetration, low attenuation, and a high propagation speed that is faste...
