近来.我国西南地区遭遇百年一遇的特大旱灾,特别是云南发生自有气象记录以来最严重的秋、冬、春连旱,灾区群众基本生活受到了严重威胁。灾情的出现再次表明了我国淡水资 Recently, the severe drought hit by once-in-a-century encounters in the southwest of our country, especially the most serious drought in autumn, winter and spring since the occurrence of its own meteorological record in Yunnan Province, has posed a serious threat to the basic livelihood of the people in the disaster areas. The emergence of the disaster has once again demonstrated our country’s freshwater resources