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四川省位于长江上游,介于东经97°26′—110°12′和北纬26°01′—34°21′之间,四周高山环绕,盆中丘陵起伏,总土地面积56.7万平方公里,其中:平原占2.5％,丘陵占18.7％,山地占46.9％,高原占31.9％。除平原外,97.5％的面积为山地丘陵和高原地带,在生产建设和开发利用中都存在着不同程度的水土保持问题。特别是占全省土地面积小、人口高度密集、开垦指数又高的丘陵地区,水土保持问题就尤感重要。在一些没有抓好水土保持工作的地区,近年来干旱频繁,洪涝加剧,导致了生态系统的恶性循环,影响了农、林、牧、副、渔五业的全面发展,给农业现代化建设增加了困难。
Sichuan Province is located in the upper reaches of the Yangtze River, between 97 ° 26’-110 ° 12’E and 26 ° 01’-34 ° 21’N, surrounded by mountains, with hilly terrain and a total land area of 567,000 km2, of which : Plain 2.5%, hills 18.7%, mountains 46.9%, plateau 31.9%. In addition to plains, 97.5% of the area is mountainous hilly and plateau areas, in the production, construction and development and utilization there are different levels of soil and water conservation issues. In particular, the hilly areas, which occupy a small area in the province, are highly populated and have a high reclamation index, make soil and water conservation issues especially important. In some areas where water and soil conservation are not properly carried out, frequent droughts and increased floods in recent years have led to a vicious cycle of ecosystems and affected the overall development of the five industries of agriculture, forestry, animal husbandry, difficult.