Number of Irrigation Areas    (year-end)

5281

5363

5562

5683

5686

  33 000  Hectares and Over              

71

72

74

101

108

  20 000-33 000  Hectares                

66

76

99

141

169

  Effective Irrigated Areas (10 000 hectares)            

2077.7

2123.1

2249.9

2449.3

2476.6

  33 000  Hectares and Over              

599.6

604.7

631.4

788.3

861.7

  20 000-33 000  Hectares                

167

189.6

244.4

344

405.4

  Number of Reservoirs                  

83219

83387

84775

85120

85136

  Large                                 

340

366

387

420

433

  Medium-sized                          

2401

2499

2593

2704

2736

  Small                                 

80478

80522

81795

81996

81967

  Capacity of Reservoirs (100 million cu.m)

4301

4660

4797

5184

5281

  Large                                 

3076

3397

3493

3842

3927

  Medium-sized                          

661

690

719

746

758

  Small                                 

564

573

585

594

595

  Water-saving Irrigated Areas (10 000 hectares)

1638.9

1744.63

  Flooded or Waterlogged Area           

1858.4

1933.7

2006.5

2098.9

2102.1

  Area of Soil Erosion under Control  

4640

5300

6690

8096

8154

  (10 000 hectares)

  Improved Area of Saline-Alkaline Land 

456.9

499.5

543.4

584.1

575.05

  (10 000 hectares)

  Total Length of Dikes       (10 000 km)

17.7

22.0

24.7

27.0

27.3

  Area of Land Protected by Dikes       

3106

3200

3060.9

3960

4067.1

  (10 000 hectares)

  a) The capacity of the large reservoirs is over 100 million cubic meters, while that of the medium ones is from 10 million to 100 million cubic meters, and that of the small

   100 000 to 10 million cubic meters.