Feature extraction and analysis of the Lijiang River water system form based on the Google Earth image
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摘要: 为获取漓江流域水系的空间分布和水系形态特征,以Google Earth影像为数据源,采用人机交互目视解译法提取了流域内的水系形态特征信息,编制了漓江流域水系分布图。通过对水系的等级、密度、分支比、各级水道长度以及交汇角等特征信息进行统计,定量化地展示了漓江流域水系的形态特征;在此基础上进行水系形态特征的控制因素分析,认为地层与断裂构造是控制漓江流域形态的重要因素,人类活动对漓江流域水系形态的影响正在日渐增强。该研究成果为漓江流域的综合治理提供了科学依据,深化了漓江流域的地貌研究。
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关键词:
- Google Earth /
- 漓江流域 /
- 水系特征 /
- 信息提取 /
- 控制因素
Abstract: In order to obtain the river system space distribution and river system feature information of the Lijiang River Basin, the authors, with Google Earth images as information source and by using the method of man -machine interactive visual interpretation, extracted basin river system configuration information and compiled water distribution map of Lijiang River basin. On the basis of information extraction and statistics of such factors as the water level, drainage density, stream tributaries branching ratio, length, and intersection angle, the morphological characteristics of Lijiang River Basin system was quantitatively demonstrated. An analysis of control factors based on river system morphology characteristics revealed that the strata and faults are the important controlling factors of Lijiang River morphology, and that the influence of human activity is growing. The research results provide objective scientific basis for the Lijiang River comprehensive control and treatment and also fill the blank in the study of the Lijiang River basin landform.-
Key words:
- Google Earth /
- Lijiang River basin /
- drainage characteristics /
- information extraction /
- control factor
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