Table 2 The evaluation index system of ULGUE of the YREB.

From: Coupling coordination analysis and spatiotemporal heterogeneity between urban land green use efficiency and ecosystem services in Yangtze River Economic Belt, China

Indicator type

Category

Indicator

Unit

References

Input

Land

Area of construction land in municipal area

km2

(Yu et al., 2019)

Labor

Employees of secondary and tertiary industries in the municipal area

10,000 persons

(Song et al., 2022)

Capital

Investment in fixed assets in the municipal area

10,000 yuan

(Tan et al., 2021)

Expected output

Economic

Output value of urban secondary and tertiary industries

10,000 yuan

(Gao et al., 2020)

Social

Average wage of employed workers

yuan

(Li et al., 2014)

Ecological

Green coverage area of built-up area

Hectare

(Lu et al., 2022)

Unexpected output

Environmental pollution

Environmental pollution index

/

(Tan et al., 2021)

carbon emission

10,000 tons

(Lu et al., 2022)