AUTHOR=Li Xinhao , Li Yiran , Di Suchuang , Niu Yong , Zhang Chuanjie 

TITLE=Evapotranspiration and land surface temperature of typical urban green spaces in a semi-humid region: Implications for green management

JOURNAL=Frontiers in Environmental Science

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2022.977084

DOI=10.3389/fenvs.2022.977084

ISSN=2296-665X

ABSTRACT=<p>Ecological deterioration and water scarcity motivate people to seek a balance between ecological reserves and water consumption in cities located in Semi-humid regions. This study is designed to develop a method for evaluating cooling water-saving characteristics of green space structures. Land surface temperature (<italic>T</italic><sub><italic>S</italic></sub>), vegetation quantity (<italic>VQ</italic>) and evapotranspiration (<italic>ET</italic>) of typical green vegetation structures in 50 plots with an average area of 10,000 m<sup>2</sup> were studied. Parameters were obtained based on data from three temporal remote sensing images; the surface energy balance algorithm for land (<italic>SEBAL</italic>) model, single-channel algorithm, and normalized difference vegetation index (<italic>NDVI</italic>) were utilized in the calculation. The relationships between the <italic>T</italic><sub><italic>S</italic></sub>, <italic>VQ</italic>, and <italic>ET</italic> of green land were explored using regression analysis. A comprehensive index (<italic>EWI</italic>) was proposed to evaluate the cooling and water-saving abilities of different green space structures. Based on assessment results, species were classified into three: good (<italic>EWI</italic> ≥ 0.795), common (0.795 &gt; <italic>EWI</italic> ≥ 0.419), and weak (<italic>EWI</italic> &lt; 0.419). The characteristics of 17 species or species compositions with good cooling and water-saving abilities were summarized as: 1) a mix of the arbor, shrub, and herb, and 2) complete cover of green space by shrub.</p>