Method for monitoring and evaluating river by applying unmanned aerial vehicle surveying and mapping

A UAV and river technology, applied in unmanned aerial vehicles, surveying and navigation, water resource assessment, etc., can solve problems such as the inability to fully and accurately reflect the physical habitat of rivers, natural conditions, and human subjective factors.
CN111412899AActive Publication Date: 2020-07-14JINAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JINAN UNIVERSITY
Publication Date
2020-07-14

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Abstract

The invention provides a method for monitoring and evaluating a river by using unmanned aerial vehicle surveying and mapping. The method comprises the following steps: acquiring image data by using anunmanned aerial vehicle; reconstructing the image data by using a motion recovery shape algorithm to construct 3D topographic information; utilizing a Vextractor program to speculate the basic shapeof the river streamline on the 3D topographic information according to the image data, and fitting the basic shape into a river curvature index of the main river channel section; calculating an ortho-image spectral index by using an RGB ortho-image measurement program to obtain river quantitative and qualitative information; and evaluating the physical environment of the river according to the curvature index and the quantitative and qualitative information of the river. The invention provides a river monitoring and evaluating method. The unmannedaerial vehicle is taken as the infrastructure,a motion recovery shape algorithm, a Vextracto program and an RGB ortho-image measurement program are utilized to track the eutrophication process in the large river and reflect the change process ofeutrophication and vegetation overgrowth, and the method has very important application value for long-term monitoring and ecological restoration of the large river.
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Description

technical field

[0001] The invention relates to the technical field of aquatic ecosystems, and more specifically, relates to a method for monitoring and evaluating rivers by using unmanned aerial vehicle surveying and mapping. Background technique

[0002] With the increasing impact of human activities on the ecosystem, rivers are facing more serious ecological problems: the phenomenon of undisturbed rivers, canalization, and encroachment of waterfront space have caused the dynamic diversity of river ecosystems to become more stable and balanced. quality, resulting in the degradation of biodiversity and ecosystem services. In river restoration projects, there is often a lack of systematic post-project monitoring and assessment of further evolution of the restoration system, and this lack of information makes it difficult to assess restoration effectiveness.

[0003] The bible of large-scale rivers has the characteristics of long change period and relatively stable, but ther...

Claims

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