Neither the Lanyang River nor the Chuoshui River, which have made the greatest contributions towards building Taiwan's plains, have reservoirs on their upper reaches. But instead people extract gravel from these rivers without restraint.
曾為台灣平原累積最多土地，貢獻不菲的河川如蘭陽溪、濁水溪，上游都無水庫，但人們反而可以在這些河流盡情開採沙石。