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12-29
Irrigation, Reservoirs, Flood Prevention, Water and Soil Conservation and
Improvement of |
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|
Item |
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|
1985 |
1990 |
1995 |
1997 |
1998 |
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|
|
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|
|
Number of Irrigation
Areas (year-end) |
5281 |
5363 |
5562 |
5579 |
5611 |
|
33 000 Hectares and Over |
71 |
72 |
74 |
77 |
79 |
|
20 000-33 000 Hectares |
66 |
76 |
99 |
115 |
114 |
|
Effective Irrigated
Areas (10 000 hectares) |
2077.7 |
2123.1 |
2249.9 |
2249.5 |
22746 |
|
33 000 Hectares and Over |
599.6 |
604.7 |
631.4 |
640.8 |
669.1 |
|
20 000-33 000 Hectares |
167 |
189.6 |
244.4 |
286.2 |
276.9 |
|
Number of Reservoirs |
83219 |
83387 |
84775 |
84837 |
84994 |
|
Large |
340 |
366 |
387 |
397 |
403 |
|
Medium-sized |
2401 |
2499 |
2593 |
2634 |
2653 |
|
Small |
80478 |
80522 |
81795 |
81806 |
81938 |
|
Capacity of Reservoirs
(100 million cu.m) |
4301 |
4660 |
4797 |
4583 |
4924 |
|
Large |
3076 |
3397 |
3493 |
3267 |
3597 |
|
Medium-sized |
661 |
690 |
719 |
729 |
736 |
|
Small |
564 |
573 |
585 |
587 |
591 |
|
Watersaving Irrigated
Areas (10 000 hectares) |
|
|
|
|
1523.5 |
|
Jetting Irrigation |
|
|
|
|
159.5 |
|
Dropping Irrigation |
|
|
|
|
14.2 |
|
Pipeline Transportion |
|
|
|
|
523.2 |
|
Flooded or Waterlogged
Area |
1858.4 |
1933.7 |
2006.5 |
2052.6 |
2068.1 |
|
Under Control
(10 000 hectares) |
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|
|
|
|
|
Area of Soil Erosion
Under Control |
4640 |
5300 |
6690 |
7224.2 |
7502.2 |
|
(10 000 hectares) |
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|
|
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Improved Area of |
456.9 |
499.5 |
543.4 |
561.2 |
565.3 |
|
(10 000 hectares) |
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Total Length of
Dikes
(10 000 km) |
17.7 |
22 |
24.7 |
25.1 |
25.8 |
|
Area of Land Protected
by Dikes |
3106 |
3200 |
3060.9 |
3414.6 |
3629.0 |
|
(10 000 hectares) |
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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 millio and that of the small ones is from 100
000 to 10 million cubic meters. |
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