春汛期间水质较差介于II类和III类之间，平水期和冰封期稳定于II类水质。

Spring flood period of poor water quality, water quality levels ranged between class II and III , other times, water quality stability in the level II .

然而，他很快就发现，他不能如期按计划向前推进，因为春汛迅速使得原本干燥的道路变得非常泥泞，人是可以过去，但他们所携带的大炮却无法行进。

He soon learned, however, that he could not move as quickly as planned. Heavy spring rains had turned the dirt roads into rivers of mud.