Identification and estimation of landslide-debris flow disaster risk in primary and middle school campuses in a mountainous area of Southwest China

Gao, Jingmin; Sang, Yihui

doi:10.1016/j.ijdrr.2017.07.012

Cited by 44 publications

(20 citation statements)

References 22 publications

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“…3(b)), the largest negative correlation cluster is located in the Middle and East Equatorial Pacific. It is reasonable that most of the clusters are found in the tropics, since the Hadley circulation plays an important role to transport moisture from the tropics to SWC (Zhao et al, 2009;Gong et al, 2018). We also find that the the Atlantic, West and East Pacific influence SWC significantly in an agreement with the previous studies (Zhao et al, 2009;.…”

Section: Methodssupporting

confidence: 92%

Complex Networks Reveal Teleconnections between the Global SST and Rainfall in Southwest China

Qiao

Liu

Zhang

et al. 2019

Preprint

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Abstract. Extreme drought events have frequently occurred in Southwest China (SWC) in this century. The rainfall of SWC could be related to several climate systems such as the East Asia monsoon, Indian monsoon and El Nino-southern Oscillation. Also it tightly depends on the variety of landforms and the complex terrain of SWC. Therefore the mechanism and prediction of rainfall in the area have became a difficult and central issue in climatology. Here we develop a novel multi-variable network method to delineate the relation between the global sea surface temperature anomalies (SSTA) and the rainfall of SWC. Our results show the important degree patterns in the Western, Eastern Pacific Ocean and Indian Ocean, which significantly influence the rainfall in SWC. Particularly the patterns will change with season and connect to some specific subareas within SWC. The strongest teleconnection is observed for the spring rainfall. The underlying mechanism of our observed teleconnection could be related to the large-scale ocean–atmosphere circulations. Moreover, we can identify the time-lag of the teleconnection links that can potentially improve the prediction of rainfall in SWC.

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Section: Methodssupporting

confidence: 92%

Complex Networks Reveal Teleconnections between the Global SST and Rainfall in Southwest China

Qiao

Liu

Zhang

et al. 2019

Preprint

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“…Climate change and human activities have altered global hydrological cycles (Christensen and Lettenmaier 2007;Brooks 2009;Cuo et al 2009;Xu et al 2016;Li et al 2017;Yang et al 2017;Hao et al 2018a) including the evapotranspiration (ET) processes (Zalewski 2000;Xu et al 2015), resulting in a series of environmental and socioeconomic impacts such as deterioration of water quality, increased runoff, and risk of floods (Roderick and Farquhar 2002;Grant et al 2012;Hallegatte et al 2013;Gao 2016;Gao and Sang 2017). ET is a key component of ecosystem water and energy balances (Hao et al 2015a;Liu et al 2017), and ET is also tightly coupled with the carbon cycle (Sun et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Climatic Controls on Watershed Reference Evapotranspiration Varied during 1961–2012 in Southern China

Qin

Hao

Sun

et al. 2018

J American Water Resour Assoc

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Reference evapotranspiration (ETo) is an important hydrometeorological term widely used in understanding and projecting the hydrological effects of future climate and land use change. We conducted a case study in the Qinhuai River Basin that is dominated by a humid subtropical climate and mixed land uses in southern China. Long‐term (1961–2012) meteorological data were used to estimate ETo by the FAO‐56 Penman–Monteith model. The individual contribution from each meteorological variable to the trend of ETo was quantified. We found basin‐wide annual ETo decreased significantly (p < 0.05) by 3.82 mm/yr during 1961–1987, due to decreased wind speed, solar radiation, vapor pressure deficit (VPD), and increased relative humidity (RH). However, due to the increased VPD and decreased RH, the ETo increased significantly (p < 0.05) in spring, autumn, and annually at a rate of 2.55, 0.56, and 3.16 mm/yr during 1988–2012, respectively. The aerodynamic term was a dominant factor controlling ETo variation in both two periods. We concluded the key climatic controls on ETo have shifted as a result of global climate change during 1961–2012. The atmospheric demand, instead of air temperature alone, was a major control on ETo. Models for accurately predicting ETo and hydrological change under a changing climate must include VPD in the study region. The shifts of climatic control on the hydrological cycles should be considered in future water resource management in humid regions.

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“…The disaster risk is dependent on the hazard, vulnerability, and exposure in terms of the population, ecology, and society, which have been widely used to effectively quantify the potential loss [37,[40][41][42]. During the risk assessment process of the earthquake-landslide-debris flow disaster chain, one of the difficult points in such research is the hazard assessment of debris flows in areas affected by earthquake-triggered landslides [20,[43][44][45][46][47]. Mathematical analysis and numerical simulation are the main methods used in this research field [20,46].…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment of Population Loss Posed by Earthquake-Landslide-Debris Flow Disaster Chain: A Case Study in Wenchuan, China

Han

Yin

Yu-ming

et al. 2021

IJGI

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Earthquakes often cause secondary disasters in mountainous areas, forming the typical earthquake-landslide-debris flow disaster chain for a long time that results in a series of losses. It is important to improve the risk assessment method from the perspective of cascading effect of such a disaster chain, by strengthening quantitative research on hazards of the debris flows which are affected by landslide volume and rainstorm intensity. Taking Wenchuan County as an example, the risk assessment method for population loss of the disaster chain is established and the risks are evaluated in this paper. The results show that the population loss risk is 2.59–2.71 people/km2 under the scenarios of the Wenchuan Ms8.0 earthquake and four rainstorm intensities. The impacts of landslide and debris flow after the earthquake were long-term and profound. A comparison of risks caused by each element of the chain revealed that the risk associated with the earthquake accounted for the highest proportion, and landslide and debris flow accounted for 38.82–37.18% and 3.42–7.50%, respectively. As the earthquake intensity increases, the total risk posed by the disaster chain increases significantly. The risk caused by the earthquake is the highest in high earthquake intensity zones; while in the lower-intensity zones, landslides and debris flows pose relatively high risks. The risk assessment results were verified through comparison with actual data, indicating that the simulation results are quite consistent with the existing disaster information and that the risk assessment method based on the earthquake-landslide-debris flow cascade process is significant for future risk estimation.

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Identification and estimation of landslide-debris flow disaster risk in primary and middle school campuses in a mountainous area of Southwest China

Cited by 44 publications

References 22 publications

Complex Networks Reveal Teleconnections between the Global SST and Rainfall in Southwest China

Complex Networks Reveal Teleconnections between the Global SST and Rainfall in Southwest China

Climatic Controls on Watershed Reference Evapotranspiration Varied during 1961–2012 in Southern China

Risk Assessment of Population Loss Posed by Earthquake-Landslide-Debris Flow Disaster Chain: A Case Study in Wenchuan, China

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