Detecting the effects of opencast mining on ecosystem services value in arid and semi-arid areas based on time-series remote sensing images and Google Earth Engine (GEE)

Table 5 The areas and proportion of ESV change trends from 1990 to 2020

β_ESV	Z	Type of change trend	Areas/km²	Percentage/%
β_ESV < − 0.005	\|Z\| ≥ 2.58	Significant increasing	6397.96	41.15%
β_ESV < − 0.005	\|Z\| < 2.58	Slight increasing	1134.87	7.30%
0.005 ≤ β_ESV < 0.005		No trend	4706.67	30.27%
β_ESV > 0.005	\|Z\| < 2.58	Slight decreasing	636.30	4.09%
β_ESV ≥ 0.005	\|Z\| ≥ 2.58	Significant decreasing	2672.93	17.19%

ISSN: 2730-7182