Table 2.
Emergy indices employed in this study and their equations
| Index | Equation | Source |
|---|---|---|
| Emergy Self-sufficiency Ratio (ESR) | ESR=(R+N)/U | Odum, 1996 |
| Environmental Loading Ratio (ELR) | ELR= (N+FN+FNC+FNR+FRC)/R | Odum, 1996 |
| Environmental Loading Ratio* (ELR*) | ELR*=(N+FN+FNC)/(R+FRC+ FNR) | Ortega et al., 2002 |
| Environmental Loading Ratio for the local system (ELRL) | ELRL= (N+ FN+FNR)/(R+FRC+FNC) | Lu et al., 2014 |
| Environmental Loading Ratio for the global system (ELRW) | ELRW= (N+FN)/(R+FRC+FNC) | Lu et al., 2014 |
| Emergy Yield Ratio (EYR) | EYR=Y/F | Odmn, 1996 |
| Emergy Sustainability Index (ESI) | ESI=EYR/ELR | Brown and Ulgiati, 1996 |
| Emergy Sustainability Index for the local system (ESIL) | ESIL=EYR/ELRL | Lu et al., 2013 |
| Emergy Sustainability Index for the global system (ESIW) | ESIW=EYR/ELRW | Lu et al., 2013 |
| Emergy Exchange Ratio for Inputs (EERI) | EERI= U/(MFN+MFNC+MFNR+MFRC) | Lu et al., 2010 |
| Emergy Exchange Ratio for Outputs (EERY) | EERY=YM/Y | Lu et al., 2010 |
| Emergy Exchange Ratio (EER′) | EER′=(FN+FR+YM)/ (MFN+MFR+Y) | Lu et al., 2010 |
| Emergy Index for Sustainable Development (EISD) | EISD=EYR*EER/ELR | Lu et al., 2003 |
| EISD for the local system (EISDL) | EISDL=EYR*EER/ELRL | Lu et al., 2014 |
| EISD for the global system (EISDW) | EISDW=EYR*EER/ELRW | Lu et al., 2014 |