According to a Peking report published in November 1986, erosion causes a loss of 10 billion tons of soil a year and affects l.5 million sq.
大陸社會學家費孝通在一九八五年出版的「瞭望」期刊中，形容位於甘肅與四川間的白龍江已成「黑」龍江。土壤流失，水庫也受波及。