What is it about?
As a phenomenon of surface fractures, earth fissures are formed under the joint action of exogenetic and endogenetic forces and their development can be characterized by parameters of length, width, depth, fractal dimension, and influential width. Based on their length, we deduced a “length-grade conversion equation” and divided earth fissures into 10 grades. In addition, we also deduced a series functions to describe the contribution of fissure-inducing forces including active fault, earthquake, groundwater withdrawal and ancient river channels based on their roles in fissure formation and their affecting conditions. These functions provide the criteria for classification of earth fissures.
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Why is it important?
we deduced a “length-grade conversion equation” and divided earth fissures into 10 grades. In addition, we also deduced a series functions to describe the contribution of fissure-inducing forces including active fault, earthquake, groundwater withdrawal and ancient river channels based on their roles in fissure formation and their affecting conditions.
Perspectives
The description method mentioned in the manuscript will help us to reveal the implication value behind the phenomenon of geomorphology, for example, indicating the distribution of shallow buried ancient river (palaeochannel). This study is the result of our team's more than ten years of work, and we are willing to publish it and share it with other colleagues.
Jishan Xu
China University of Mining and Technology
Read the Original
This page is a summary of: Classification, grading criteria and quantitative expression of earth fissures: a case study in Daming Area, North China Plain, Geomatics Natural Hazards and Risk, January 2018, Taylor & Francis,
DOI: 10.1080/19475705.2018.1475426.
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