Table 2 Grading standard of cumulative impact assessment indexes

D1

0–5628

5628–11500

11500–14709

14709–16615

16615–17000

D2

0–31.533

31.533–43.409

43.409–50.422

50.422–52.084

52.084–56.547

D3

0–0.05

0.05–0.12

0.12–0.16

0.16–0.27

0.27–0.61

D4

758–2416

2416–4709

4709–9323

9323–20491

20491–63958

D5

0.50–0.60

0.60–0.70

0.70–0.80

0.80–0.88

0.88–0.94

D6

0.11–2.61

2.61–3.77

3.77–4.68

4.68–5.81

5.81–8.10

D7

1200–812

812–601

601–427

427–253

253–181

D8

1000–694

694–505

505–265

265–104

104–0

D9

1–0.98

0.98–0.96

0.96–0.89

0.89–0.83

0.83–0

D10

238–502

502–1279

1279–1662

1662–1856

1856–1935

D11

0–2

2–4

4–6

6–8

8–10