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12-9    Irrigation, Reservoirs, Flood Prevention, Water
and Soil Conservation and Improvement of Saline-Alkaline Land
Item
1985 1990 1995 2000 2001
  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 ones is from 100 000 to 10 million cubic meters.
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