11-10 灌溉、水库和除涝、治水、治碱情况 IRRIGATION, RESERVOIRS, FLOOD PREVENTION, WATER AND SOIL CONSERVATION AND IMPROVEMENT OF SALINE-ALKALINE LAND -------------------------------------------------------------------------------------------------------------- | | | | | 项 目 Item | 1985 | 1990 | 1993 | 1994 | 1995 | | | | | -----------------------------------------------------------------+--------+--------+--------+--------+-------- 年底灌区数 (处) Number of Irrigation Systems (year-end)| 5281 5363 5567 5523 5562 3.3万公顷以上 33 001 Hectares Over | 71 72 74 74 74 0.7-3.3万公顷 7 001-33 000 Hectares | 66 76 92 98 99 灌区有效灌溉面积(万公顷) Effectively Irrigated Areas (10 000 ha)| 2077.7 2123.1 2448.3 2235.3 2249.9 3.3万公顷以上 33 001 Hectares Over | 599.6 604.7 623.9 628.8 631.4 0.7-3.3万公顷 7 001-33 000 Hectares | 167.0 189.6 231.8 242.9 244.4 水库 (座) Number of Reservoirs | 83219 83387 84614 84558 84775 大型水库 Large | 340 366 374 381 387 中型水库 Medium | 2401 2499 2562 2572 2593 小型水库 Small | 80478 80522 81678 81605 81795 水库库容量 (亿立方米) Capacity of Reservoirs(100 000 000cu.m)| 4301 4660 4717 4751 4797 大型水库 Large | 3076 3397 3425 3456 3493 中型水库 Medium | 662 690 709 713 719 小型水库 Small | 564 573 583 582 585 易涝面积 (万公顷) Total Area Subject to Flooding | 2420.7 2446.7 2442.5 2442.5 2442.5 (10 000 ha)| 除涝面积 (万公顷) Area with Flood Prevention | 1858.4 1933.7 1988.3 1997.9 2006.5 Measures (10 000 ha)| 占易涝面积比重 (％) Percentage to Total Area Liable to | 76.8 79.0 81.4 81.8 82.2 Flooding (％)| 水土流失面积(万平方公里) Total Area of Water Loss and Soil Ero- | 129.2 136.0 163.0 163.0 163.0 sion (10 000 sq.km)| 治理水土流失面积 Area with Water and Soil Conservation | 46.4 53.0 61.3 64.1 66.9 (万平方公里) Measures (10 000 sq.km)| 占流失面积比重 (％) Percentage to Total Area of Water | 35.9 39.0 37.6 39.3 41.0 Loss and Soil Erosion (％)| 盐碱耕地面积 (万公顷) Total Area of Saline-Alkaline Land | 769.3 753.9 765.6 765.6 765.6 (10 000 ha)| 治碱面积 (万公顷) Improved Area of Saline-Alkaline Land | 456.9 499.5 530.5 535.1 543.4 (10 000 ha)| 占盐碱耕地面积比重(％) Percentage to Total Area of Saline- | 59.4 66.3 69.3 69.9 71.0 Alkaline Land (％)| 堤防长度 (万公里) Total Length of Dikes and Levies | 17.7 22.0 24.5 24.6 24.7 (10 000 km)| 堤防保护面积 (万公顷) Land Protected by Dikes and Levies | 3106.0 3200.0 3088.5 3024.6 3060.9 (10 000 ha)| -------------------------------------------------------------------------------------------------------------- 注: 大型水库库容: 1亿立方米以上; 中型水库库容: 1千万至1亿立方米; 小型水库库容: 10万至1千万立方米。 a)Capacity for Large reservoirs are over 100 000 000 cu.m,for medium reservoirs are from 10 000 000 to 100 000 000 cu.m,for samll reservoirs are from 100 000 to 10 000 000 cu.m.