期刊论文详细信息
Sensors
Monitoring the Water Stress of an Indoor Living Wall System Using the “Triangle Method”
Kati Laakso1  Arturo Sanchez-Azofeifa1  J.Antonio Guzmán Q.1  ChadDaniel Davis2  Xu Yuan3  Qinglin Meng3 
[1] Centre for Earth Observation Sciences (CEOS), Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada;Gardens by the Bay, Singapore 018953, Singapore;State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China;
关键词: living wall;    triangle method;    remote sensing;    temperature;    NDVI;   
DOI  :  10.3390/s20113261
来源: DOAJ
【 摘 要 】

Living walls are important vertical greening systems with modular prevegetated structures. Studies have suggested that living walls have many social benefits as an ecological engineering technique with notable potential for reconciliation ecology. Despite these benefits, there are currently no mature workflows or technologies for monitoring the health status and water stress of living wall systems. To partially fill the current knowledge gap related to water stress, we acquired thermal, multispectral, and hyperspectral remote sensing data from an indoor living wall in the Cloud Forest of the Gardens by the Bay, Singapore. The surface temperature (Ts) and a normalized difference vegetation index (NDVI) were obtained from these data to construct a Ts-NDVI space for applying the “triangle method”. A simple and effective algorithm was proposed to determine the dry and wet edges, the key components of the said method. The pixels associated with the dry and wet edges were then selected and highlighted to directly display the areas under water-stress conditions. Our results suggest that the proposed algorithm can provide a reasonable overview of the water-stress information of the living wall; therefore, our method can be simple and effective to monitor the health status of a living wall. Furthermore, our work confirms that the triangle method can be transferred from the outdoors to an indoor environment.

【 授权许可】

Unknown   

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