Deforestation on the upper reaches of the Yangtze led to huge amounts of silt and sediment downstream, and the Tungting is the first major lake on the way.
「洞庭湖現在每年入沙量是一億公噸，一般載砂石的大卡車滿載時不過是半公噸，如此鉅大的數量，怎麼清除？」