| 1. | Whether shortage of water resources is determined by two factors , water demand and water supply , is still uncertain . since it is also affected by runoff , rainfall and other randomized factors , so there are risks existing in the regional water supply system 水资源是否短缺是受供给和需求两个主要因素影响,当供给不能满足用水需求时,就会出现水资源短缺风险。 |