In France, for example, the whole country has been divided into six major river basins, and management committees from each area consider the condition of each river and the tolerance of the local population in deciding what kinds of factories to permit.
以法國來說，全國分成六大流域，在不可低於國家標準下，由各流域組成的管理委員會視各河川的容忍度，和地方居民願意忍受程度，決定允許什麼樣的工廠設置。