Formation damage caused by secondary precipitation of ferric ion is a potential problem in acidizing and excessive iron level would bring a series of chain reaction and vicious cycle.
The annual precipitation and summer precipitation are very similar in terms of time scales and cycle characteristics.
年降水量与夏季降水量在时间尺度和周期特征方面非常相似。
3
Global warming brings an important impact to the water cycle factors such as air temperature, precipitation and runoff and so on in the area in the recent decades years.