[1]张艳如,李国庆,刘 冠,等.陕西省延安市燕沟流域水系分形与地貌侵蚀发育研究[J].水土保持研究,2022,29(02):7-10.
　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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陕西省延安市燕沟流域水系分形与地貌侵蚀发育研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 29 期数: 2022年02期 页码: 7-10 栏目: 出版日期: 2022-03-20
Title:
Fractal Characteristics of Water System and Geomorphic Erosion Development of Yangou Basin in Yan'an City of Shaanxi Province
文章编号:
1005-3409(2022)02-0007-04
作者:
张艳如1,3, 李国庆1,2, 刘 冠2,4, 鲁 奇2,4, 杜 盛1,2
(1.中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100; 2.西北农林科技大学 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100; 3.中国科学院大学, 北京 100049; 4.西北农林科技大学 林学院, 陕西 杨凌 712100)
Author(s):
ZHANG Yanru1,3, LI Guoqing1,2, LIU Guan2,4, LU Qi2,4, DU Sheng1,2
(1.Institute of Soil and Water Conservation, CAS&MWR, Yangling, Shaanxi 712100, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China)
关键词:
分形维数;  侵蚀;  面积高程积分值;  燕沟流域;  水系
Keywords:
fractal dimension;  erosion;  hypsometric integral value;  Yangou Basin;  water system
分类号:
P331.3; P931.6; S157.1
文献标志码:
A
摘要:
为验证分形维数法与传统地貌法判断地貌侵蚀发育阶段是否一致,基于DEM数据提取陕西省延安市燕沟流域水系结构图,利用网格法计算燕沟流域水系分形维数,利用高程面积曲线法刻画了该流域的地貌侵蚀发育阶段。结果显示:燕沟流域水系长度为61.6 km,水系密度为1.29 km/km2,水系数量为109条,燕沟流域水系的分形维值为0.98,高程曲线下面积为0.497。由此可以得出,燕沟流域地貌处于侵蚀发育的壮年期,需要加强该地区水土流失治理; 分形维数阈值判断方法忽略了面蚀在地貌侵蚀过程中的作用,它将低估该地区地貌发育程度,因此利用水系分维值推断地貌侵蚀发育阶段的阈值需要更改。
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.

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备注/Memo

收稿日期:2021-01-24 修回日期:2021-04-15
资助项目:国家重点研发计划(2017YFC0504601); 国家自然科学基金(31971488)
第一作者:张艳如(1990—),女,吉林双辽人,博士研究生,研究方向为流域生态学。E-mail:Yanruzhang0119@163.com
通信作者:李国庆(1983—),男,江苏连云港人,副研究员,博导,主要从事植被恢复与GIS模拟研究。E-mail:liguoqing@nwsuaf.edu.cn

更新日期/Last Update: 2022-04-20