The Study of the Topography-Measure Applied in China's Southwest Precipitous Areas a Case Study in YunDian Village HuiLi County in LiangShan Autonomous Prefecture

2015 ◽  
Vol 744-746 ◽  
pp. 1714-1719
Author(s):  
Jia Na Li ◽  
Kun Zhang
Keyword(s):  
Debris Flow ◽  
Southwest China ◽  
Reference Value ◽  
Geological Structure ◽  
Mountainous Areas ◽  
Geological Structures ◽  
Geological Disaster

Since the area of Southwest China crosses the first ladder and the second one ,thus it is featured with precipitous terrains. Owing to such complex factors as deep valleys, steep mountains, varied topography and complex geological structures, it is extremely hard for people to obtain exact leveling data about this area. Therefore ,it is necessary to summarize the geodetic datum and tech of Southwestern mountainous areas, which can be of great reference value for the research of the similar places with regards to its hydrology, geology, geological structure and ground. At the same time this essay will contribute to the study of geological disaster such as earthquake ,landslide and debris flow.

scholarly journals Quantitative Assessment of Regional Debris-Flow Risk: A Case Study in Southwest China

2018 ◽  
Vol 10 (7) ◽  
pp. 2223 ◽  
Author(s):  
Guangxu Liu ◽  
Erfu Dai ◽  
Xinchuang Xu ◽  
Wenxiang Wu ◽  
Aicun Xiang
Keyword(s):  
Debris Flow ◽  
Quantitative Assessment ◽  
Southwest China

scholarly journals Transformation of Rural Landscape Patterns in Southwest China's Mountain: A Case Study Based on the Three Gorges Reservoir Area

2021 ◽  
Author(s):  
Mingzhen Li ◽  
Xie Yuxuan ◽  
Yangbing Li
Keyword(s):  
Land Use ◽  
Landscape Pattern ◽  
Southwest China ◽  
Rural Landscape ◽  
Transformation Model ◽  
Mountainous Areas ◽  
Rural Revitalization ◽  
Landscape Types ◽  
Pattern Transformation

Abstract Since the 21st century, China's rural areas have experienced far-reaching social and economic transformation. Studying the evolution and transformation of rural land use landscape pattern under this background is of great significance to reveal the evolution of human-land relationship in China’s mountains and explore the rural revitalization path. Based on the study of land use change and transition, we put forward the theoretical framework of landscape pattern transition, and establish the rural landscape pattern transformation model of mountain area in southwest China by use of high resolution remote sensing images and field investigation. The results show that: (1) The focus of landscape pattern transformation in the case region is mainly embodied in the reduction of cultivated land, the expansion of orchard and the restoration of woodland. There are obvious differences in landscape pattern transition among different terrain areas in the case region. (2) From 2000 to 2018, the landscape types in the valleys of the study area were gradually diversified, there was a concentration of intensive land use types, and the landscape types in mountainous and hilly area were gradually simplified, and forest land was restored. (3) On the whole, the landscape pattern of the study area has changed from production-oriented landscape pattern to eco-economic landscape pattern and eco-regulatory landscape pattern. The results of case study show that the rural landscape pattern in the mountainous areas of Southwest China has undergone a transformation under the background of land use transformation, which has its own particularity, and verifies the theoretical hypothesis proposed in this paper, so it is necessary to conduct a systematic and in-depth study on this. The theories and methods of this paper are helpful to understand the process of landscape pattern transition in mountainous areas, and provide reference value for the rational use of land resources, ecological management and rural revitalization in similar mountainous areas.

scholarly journals Assessment of relative importance of debris flow disaster risk affecting factors based on meta-analysis – cases study of northwest and southwest China

2020 ◽  
Author(s):  
Yuzheng Wang ◽  
Lei Nie ◽  
Min Zhang ◽  
Hong Wang ◽  
Yan Xu ◽  
...  
Keyword(s):  
Risk Factors ◽  
Debris Flow ◽  
Southwest China ◽  
Meta Analysis ◽  
Geological Structure ◽  
Daily Maximum ◽  
Relative Importance ◽  
Maximum Rainfall ◽  
Factors Affecting ◽  
Geological Conditions

Abstract. Debris flow is a type of special torrent containing numerous solid materials. It is characterized by sudden outbreak, short duration, and strong destructive force. The occurrence of debris flow is often affected by hydrogeological and geological conditions, including basin area, main ditch length, relative height difference, slope, bed bending coefficient, daily maximum rainfall and so on. With many types of factors affecting debris flow, no reliable basis for selecting factors to evaluate debris flow risk has been established. Therefore, to study the factors affecting debris flow, exploring a reliable method for assessing the relative importance of such factors is an important endeavor in debris flow prevention and control work. In this research, debris flow risk assessment was combined with meta-analysis to analyze quantitatively the relative importance of risk factors of debris flow in northwest and southwest China. Results show that debris flow in northwest China is mainly affected by topography and geological structure. Rainfall plays an important role in stimulating debris flow in this area. For debris flow in southwest China, topography, geological structure, and rainfall conditions all have considerable influence. Meta-analysis can provide a basis for the selection of risk factors of debris flow and has certain reliability.

scholarly journals Valuation of debris flow mitigation measures in tourist towns: a case study on Hongchun gully in southwest China

2016 ◽  
Vol 13 (10) ◽  
pp. 1867-1879 ◽  
Author(s):  
Ming-li Chen ◽  
Gui-sheng Hu ◽  
Ning-sheng Chen ◽  
Cun-yao Zhao ◽  
Song-jiang Zhao ◽  
...  
Keyword(s):  
Debris Flow ◽  
Southwest China ◽  
Mitigation Measures

A case study on sulfur sludge harmless treatment in southwest China

2013 ◽  
Author(s):  
Feng Ouyang ◽  
Zhijiao Chen ◽  
Mingjie Tang ◽  
Yahui Zhang
Keyword(s):  
Southwest China
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