The flood plain used to be wide and marshy, but today its banks have been narrowed by levees, its course straightened, and the bed of the river raised, so that the water has soaked away leaving dry river bed inhospitable to waterfowl.
他表示，過去河域寬闊、潮濕；如今築了堤防，河川取直，河面窄縮，且河水下滲、溪床乾涸，已不適合雁鴨棲息。