Ecological factors

Evaluation standards

Classification

Evaluation value

Weights

Slope gradient of both slopes in gullies

The smaller the slope gradient is, the higher suitability of ecological construction

<5˚

5

0.100

5˚ - 25˚

3

>25˚

1

Gully width

The wider the gully is , the higher suitability of ecological construction

>300 m

5

0.125

100 m - 300 m

3

<100 m

1

Surface water

The better the surface water is, the higher suitability of ecological construction

Reservoir and the coverage area

5

0.075

Rivers and springs

3

No water areas

1

Cultivated land per capita

The larger the cultivated land per capita is, the higher suitability of ecological construction

>3.0 mu/per

5

0.100

1.5 - 3.0 mu/per

3

<1.5 mu/per

1

Population size

The larger the population size is, the higher suitability of ecological construction

>300 people

5

0.100

100 - 300 people

3

<100 people

1

Transportation

The better the transportation is, the higher suitability of ecological construction

Transportation joint

5

0.100

Transportation thoroughfares

3

Faraway from transportation thoroughfares

1

Village land use degrees

The higher the village land use degrees are, the higher suitability of ecological construction

>30%

5

0.100

5% - 30%

3

<5%

1

Soil productivity

The better the soil productivity is, the higher suitability of ecological construction

High productivity

5

0.125

Medium productivity

3

Low productivity

1

Plants diversity

The more diversity the plants are, the higher suitability of ecological construction

Dense forest zone

5

0.075

Half forest and half tillage zone

3

No vegetation zone

1

Public infrastructure degrees

The higher lever the public infrastructure degrees are, the higher suitability of ecological construction

Good

5

0.100

General

3

Poor

1