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Response analysis of valley settlements to the evolution of debris flow fans under different topographic conditions: a case study of the upper reaches of Min River, China

  • Mingtao DingEmail author
  • Chuan TangEmail author
  • Cheng Miao
Original Paper
  • 38 Downloads

Abstract

The upper reaches of Minjiang (Min) River were selected to research the relationship between debris flow fan formation and topography. Combining the historical statistical data of settlement and debris flow events, there are 3 years (1994, 2004, and 2014) for which comparable data are available. With the support of remote sensing (RS) and geographic information system (GIS) technology, the distribution characteristics and evolution of valley settlements and debris flow fans in terrain conditions with varying elevation, slope, and slope aspect are analyzed. The coupled relationship between valley settlement and debris flow accumulation fan evolution is analyzed by regression analysis. The results show that the distribution characteristics of valley settlements and debris flow fans in the upper reaches of Min River show high consistency and convergence in different topographic conditions, and they have a response relationship with each other. With elevation, both settlements and debris flow fans increase linearly with each other, and, over time, the rate of change of the distribution of valley fans with debris flow accumulation increases then decreases. In regard to slope, both parameters conform to two polynomial function models, that is, the river valley settlement increases first and then decreases with the increase of debris flow accumulation fans. For the slope aspect, the number of valley settlements increases with the increase of the change rate of debris flow fans density. The study will provide some assistance for the countermeasures on valley settlements to the evolution of debris flow fans in the upper reaches of Min River.

Keywords

Valley settlement Debris flow fan Topographic Distribution characteristics Evolution process Response analysis Minjiang (Min) River 

Notes

Funding information

The study was financially supported by the National key research and development program (Grant No. 2018YFC1505402), National Natural Science Foundation of China (Grant No. 41871174), Opening fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) (Grant No. SKLGP2019K018), and the Fundamental Research Funds for the Central Universities (Grant No. 2682019CX19).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong UniversityChengduChina
  2. 2.State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengduChina
  3. 3.School of Geography and PlanningSun Yat-Sen UniversityGuangzhouChina

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