Method for evaluating shading influence of high-rise building on photosynthetic carbon fixation capability of greenbelts

Abstract

The invention relates to a method for evaluating the shading influence of a high-rise building on the photosynthetic carbon fixation capability of greenbelts. The method comprises the steps that a digital surface model of a research zone is established; the total direct radiation quantity, the total scattering radiation quantity and the total radiation quantity are calculated; in specific time and at specific position, a spectrum and radiation strength are determined by utilizing a spectrograph, model simulation data is corrected, and solar radiation is converted into photosynthetically active radiation in the wavelength range of 380-710 nm; photoresponse curves and leaf area indexes of vegetations are determined; the carbon fixation capability reduction level under the shading influence of the high-rise building within a certain time is calculated. By adopting the method, solar radiation analysis of a three-dimensional space and determination of physiological and ecological parameters of plants are combined, nonuniform spatial allocation and ground solar radiation changes of building groups in different shapes in an urban three-dimensional environment are systematically analyzed, the influence levels of the groups on the carbon fixation process of surrounding greening plants is accessed, and relevant basic method support is provided for efficient and reasonable utilization of urban light energy resources and urban green space planning and design oriented to ecological service function improvement.

Description

technical field [0001] The invention relates to an evaluation method, in particular to an evaluation method for the influence of high-rise building shade on the photosynthetic carbon fixation capacity of green spaces. Background technique [0002] With the acceleration of urbanization, the average height of buildings in cities shows a continuous growth trend, and the volume of high-rise buildings continues to expand. Compared with low-rise buildings, the construction of high-rise buildings with the same usable area can greatly reduce the occupation of land space. At the same time, it also has the advantages of less investment in municipal construction and a shorter construction period, which has obvious social and economic benefits. [0003] However, in recent years, the increasing number of high-rise buildings in urban areas has begun to show the characteristics of clusters and contiguous areas, which reshaped the urban skyline and led to changes in the near-surface microcl...

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Problems solved by technology

The changes in the daytime light environment in these cities have weakened the photosynthetic carbon sequestration of plants, and also directly affected the growth and development of plants such as flowering and fruiting, which has brought great difficulties to the improvement of the ecological service function of urban green spaces and urban greening management.

[0005] At present, there is rarely an evaluation method for the impact of building shading on the photosynthetic carbon sequestration capacity of green spaces. Therefore, there are certain restrictions on the utilization of urban light energy resources and the planning and design of urban green spaces.

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