综述2006年,全国11条大江大河径流量:长江、黄河、海河、淮河、松花江、辽河、钱塘江均低于多年平均径流量,珠江、闽江、塔里木河、黑河均超过多年平均径流量;与2005年相比,黄河、海河、塔里木河、黑河变化不大,长江、淮河、松花江、辽河、钱塘江下降较大,珠江、闽江均有增加。各流域土壤侵 Summary In 2006, the runoffs of 11 major rivers nationwide were lower than those of the Yangtze River, the Yellow River, the Haihe River, the Huaihe River, the Songhua River, the Liaohe River and the Qiantang River. Both the Pearl River, the Minjiang River, the Tarim River and the Heihe River exceeded the average annual runoff Compared with 2005, the Yellow River, the Haihe River, the Tarim River and the Heihe River did not change much. The Yangtze River, the Huaihe River, the Songhua River, the Liaohe River and the Qiantang River decreased greatly, while the Pearl River and the Minjiang River increased. Soil erosion in all watersheds