Karimi Nima, Ng Kelvin Tsun Wai, Richter Amy, Williams Jason, Ibrahim Hussameldin
Environmental Systems Engineering, Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, SK, S4S 0A2, Canada.
Environmental Systems Engineering, Faculty of Engineering and Applied Science, University of Regina, 3737 Wascana Parkway, Regina, SK, S4S 0A2, Canada.
J Environ Manage. 2021 Jun 1;287:112320. doi: 10.1016/j.jenvman.2021.112320. Epub 2021 Mar 13.
Information on the spatial extent of potential impact areas near disposal sites is vital to the development of a sustainable natural resource management policy. Eight Canadian landfills of various sizes and shapes in different climatic conditions are studied to quantify the spatial extent of their bio-thermal zone. Land surface temperature (LST) and normalized difference vegetation index (NDVI) are examined with respect to different Land Use Land Cover (LULC) classes. Within 1500 m of the sites, LST ranged from 18.3 °C to 29.5 °C and 21.3 °C-29.7 °C for forest land and agricultural land, respectively. Linear regression shows a decreasing LST trend in forest land for five out of seven landfills. A similar trend, however, is not observed for agricultural land. Both the magnitude and the variability of LST are higher in agricultural land. The size of the bio-thermal zone is sensitive to the respective LULC class. The approximate bio-thermal zones for forest class and agricultural classes are about 170 ± 90 m and 180 ± 90 m from the landfill perimeter, respectively. For the forest class, NDVI was negatively correlated with LST at six out of seven Canadian landfills, and stronger relationships are observed in the agricultural class. NDVI data has a considerably larger spread and is less consistent than LST. LST data appears more appropriate for identifying landfill bio-thermal zones. A subtle difference in LST is observed among six LULC classes, averaging from 23.9 °C to 27.4 °C. Geometric shape makes no observable difference in LST in this study; however, larger landfill footprint appears to have higher LST.
了解处置场附近潜在影响区域的空间范围对于制定可持续的自然资源管理政策至关重要。对加拿大不同气候条件下八个不同大小和形状的垃圾填埋场进行了研究，以量化其生物热区的空间范围。针对不同的土地利用土地覆盖（LULC）类别，研究了地表温度（LST）和归一化植被指数（NDVI）。在距离场地1500米范围内，林地和农田的LST分别为18.3℃至29.5℃和21.3℃至29.7℃。线性回归显示，七个垃圾填埋场中有五个的林地LST呈下降趋势。然而，农田并未观察到类似趋势。农田的LST幅度和变异性均较高。生物热区的大小对各自的LULC类别敏感。森林类别和农业类别的近似生物热区分别距离垃圾填埋场周边约170±90米和180±90米。对于森林类别，在七个加拿大垃圾填埋场中有六个，NDVI与LST呈负相关，而在农业类别中观察到更强的关系。NDVI数据的分布范围明显更大，且不如LST一致。LST数据似乎更适合识别垃圾填埋场生物热区。在六个LULC类别中观察到LST存在细微差异，平均范围为23.9℃至27.4℃。在本研究中，几何形状对LST没有明显影响；然而，较大的垃圾填埋场占地面积似乎具有更高的LST。
