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综述2009年,全国11条大江大河径流量:除黑河径流量高于多年平均径流量外,其他各流域径流量均低于多年平均径流量;与2008年相比,长江、海河、淮河、珠江、辽河、闽江、塔里木河有所下降,松花江、钱塘江有所上升,黄河、黑河变化不大。各流域土壤侵蚀量:与多年平均侵蚀量相比,长江、黄河、海河、淮河、珠江、松花江、辽河、闽江、塔里
Summary In 2009, the runoff of 11 major rivers nationwide: except that the runoff of Heihe River was higher than that of multi-year average runoff, the runoff of other watersheds was lower than the average runoff of many years. Compared with 2008, the runoffs of Yangtze River, Haihe River, Huaihe River, Pearl River The Liaohe River, Minjiang River and Tarim River have declined. The Songhua River and Qiantang River have risen, while the Yellow River and Heihe River have not changed much. Soil erosion in each basin: compared with the average erosion over many years, the Yangtze River, Yellow River, Haihe River, Huaihe River, Pearl River, Songhua River, Liaohe River, Minjiang River, Tarim