Serial number

Variable name

Variable type

Variable unit

Serial number

Variable name

Variable type

Variable unit

A

Fixed assets

L

Ten thousand yuan

23

Salaries of pipe network personnel

A

Ten thousand yuan

2

Average wage of employees

L

Ten thousand yuan

24

Wages of sewage treatment personnel

A

Ten thousand yuan

3

Length of drainage pipe

L

km

25

Total sewage discharge

A

Ten thousand tons

4

Total population

L

Ten thousand yuan

26

Total sewage treatment

A

Ten thousand tons

5

GDP

L

Ten thousand yuan

27

Pipe network operators

A

persons

6

Length of drainage pipeline growth rate

R

dmnl

28

Sewage treatment personnel

A

persons

7

Rate of increase in fixed assets

R

dmnl

29

Production water consumption

A

Ten thousand tons

8

Average wage growth rate

R

dmnl

30

Domestic water consumption

A

Ten thousand tons

9

Population growth rate

R

dmnl

31

Total water usage

A

Ten thousand tons

10

GDP growth rate

R

dmnl

32

Average per person maintenance pipe network length

C

km/per capita

11

Increase in fixed assets

A

Ten thousand yuan

33

Depreciation rate of fixed assets

C

dmnl

12

Drainage pipe length increase value

A

km

34

Average staffing ratio

C

persons/ten thousand tons

13

Increase in average wage of employees

A

Ten thousand yuan

35

Average operating cost per ton

C

yuan/ton

14

Population growth value

A

Ten thousand persons

36

COD content per ton of sewage

C

dmnl

15

GDP added value

A

Ten thousand yuan

37

COD Electricity single consumption

C

kWh/ton

16

Total annual operating cost of COD

A

Ten thousand yuan

38

Average electricity price

C

yuan/kWh

17

COD total annual processing volume

A

Ten thousand tons

39

COD removal rate

C

dmnl

18

Annual operating costs

A

Ten thousand yuan

40

Amount of domestic water per capita

C

ton/per capita

19

Power consumption costs

A

Ten thousand yuan

41

Sewage treatment rate

C

dmnl

20

Total Payroll

A

Ten thousand yuan

42

Sewage discharge coefficient

C

dmnl

21

Depreciation of fixed assets

A

Ten thousand yuan

43

Water consumption per dollar GDP

C

ton/yuan

22

Total COD emissions

A

Ten thousand tons