Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Roof vegetation evapotranspiration measuring method based on thermal imaging technology

A thermal imaging technology and evapotranspiration technology, applied in the field of ecological monitoring, can solve problems such as inapplicability

Active Publication Date: 2017-05-31
PEKING UNIV SHENZHEN GRADUATE SCHOOL
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the vegetation on urban green roofs is usually herbaceous, which is not suitable for tree trunk sap flow method.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Roof vegetation evapotranspiration measuring method based on thermal imaging technology
  • Roof vegetation evapotranspiration measuring method based on thermal imaging technology

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0055] see figure 2 , is the infrared remote sensing image of the green roof vegetation whose evapotranspiration is to be calculated in the embodiment of the present invention, and the shooting time is 8:00 a.m.

[0056] Specific steps are as follows:

[0057] 1. Using infrared remote sensing technology, take thermal infrared images directly above the green roof planting area; judge whether it is necessary to separate the soil from the vegetation according to the vegetation coverage f. to be calculated separately. If the vegetation coverage rate f is almost 100%, the evaporation rate E of soil water can be ignored, and the evapotranspiration rate ET of the research area is approximately equal to the vegetation transpiration rate T, and there is no need to separate soil and vegetation; if the vegetation coverage rate f is low, depending on the study area The evapotranspiration rate ET is equal to the sum of the vegetation transpiration rate T and the soil water evaporation r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a roof vegetation evapotranspiration measuring method based on the thermal imaging technology; the method comprises the following steps: obtaining a roof vegetation thermal infrared image, and processing the thermal infrared image so as to obtain a reference vegetation canopy surface temperature value Tp and a vegetation canopy surface temperature value Tc; obtaining meteorology data information of shooting place; calculating the meteorology data information, the reference vegetation canopy surface temperature value Tp and the vegetation canopy surface temperature value Tc so as to obtain a plant transpiration rate T and a soil evaporation rate E; using the plant transpiration rate T and the soil evaporation rate E to obtain a roof vegetation evapotranspiration rate ET, and further obtaining the roof vegetation evapotranspiration Ev. The roof vegetation evapotranspiration measuring method based on the thermal imaging technology can observe irregularly distributed vegetation without being affected by convection and without contacting the vegetation, thus accurately measuring city green roof evapotranspiration.

Description

technical field [0001] The invention relates to the technical field of ecological monitoring, in particular to a method for measuring evapotranspiration of roof vegetation based on thermal imaging technology. Background technique [0002] The urban green area continues to decrease along with the expansion of urbanization, which directly leads to the enhancement of the urban heat island effect and the increase of urban runoff. Green roof vegetation is an effective measure to increase the urban green area, which can effectively alleviate the above problems while being ornamental. In the case of increasingly tight urban space and limited increase in urban green space, green roof vegetation is becoming more and more popular. [0003] The water balance of urban green roof vegetation is a research focus, and the basic balance relationship is "precipitation = soil moisture content increase + runoff + evapotranspiration". Evapotranspiration is an important part of the water balanc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01J5/00G01J5/60G01N33/00
CPCG01J5/00G01J5/60G01J2005/0077G01J2005/0092G01N33/0098
Inventor 邱国玉李瑞利秦龙君赵云霞
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com