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Table 1 Evaluation indices for ecological security of Baiquan County

From: Temporal variations of ecological security with soil and water loss stress in black soil region of northeast China: a case study on Baiquan County

1st layer

2nd layer

3rd layer

4th layer

Weight

Ecological Unsafety Index (A)

Pressure

(B 1 )

Population Pressure (C1)

Natural Population Growth Rate (D1)

0.0174

   

Population Density (D2)

0.0174

  

Land Pressure (C2)

Per Capita Arable Land (D3)

0.0423

   

Area Proportion of Soil and water Loss (D4)

0.1395

  

Pollution Pressure (C3)

Fertilizer Load (D5)

0.0397

   

Pesticide Load (D6)

0.0397

 

Status

(B2)

Environmental Status (C4)

Probability of Natural Disaster (D7)

0.0749

   

Forestry and Grass Coverage (D8)

0.0943

   

Soil Erosion Modulus (D9)

0.1188

  

Natural Resources Status (C5)

Effective Thickness of Soil Layer (D10)

0.1113

   

Precipitation Rate of April~May to July~August (D11)

0.0701

 

Response (B3)

Social Response (C6)

Effective Irrigation Rate of Arable Land (D12)

0.0394

  

Environmental Response (C7)

Agricultural Technican Numbers Per Ten Thousand People (D13)

0.0156

1

 

Economic Response (C8)

Area Proportion of Soil and Water Loss Control (D14)

0.1102

   

Per Capita Rural Net Income (D15)

0.0347

   

Agriculture Production Per Unit Cultivated Land (D16)

0.0347