[1]ZHANG Yanru,LI Guoqing,LIU Guan,et al.Fractal Characteristics of Water System and Geomorphic Erosion Development of Yangou Basin in Yan'an City of Shaanxi Province[J].Research of Soil and Water Conservation,2022,29(02):7-10.
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Fractal Characteristics of Water System and Geomorphic Erosion Development of Yangou Basin in Yan'an City of Shaanxi Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 02
Page number:
7-10
Column:
Public date:
2022-03-20
- Title:
- Fractal Characteristics of Water System and Geomorphic Erosion Development of Yangou Basin in Yan'an City of Shaanxi Province
- CLC:
- P331.3; P931.6; S157.1
- DOI:
- -
- Abstract:
- In order to verify whether the fractal dimension method is consistent with the traditional geomorphic method in judging the development stage of geomorphic erosion, we extracted the water system structure map of Yangou Basin in Yan'an City, Shaanxi Province based on digital elevation model. The fractal dimension value of the water system was calculated by grid method, and the development stage of geomorphic erosion in the basin was described by hypsometric integral curve method. The results show that the length of water system is 61.6 km, the density of water system is 1.29 km/km2, the number of water system is 109, the fractal dimension value of the basin is 0.98, and the area under the hypsometric integral curve is 0.497. The geomorphy of the Yangou Basin is in the prime stage of erosion development. It is necessary to strengthen the control of soil and water loss in this basin. The method of fractal dimension threshold in determining the erosion stage ignores the role of surface erosion in the process of geomorphic erosion, and it will underestimate the degree of geomorphic erosion development in this area. Therefore, the threshold value of fractal dimension should be modified when it is used to infer the development of geomorphic erosion.
- References:
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Last Update:
2022-04-20