The severity of waterlogging is not only related to the rain intensity, but also associated with the cumulated precipitation and the precipitationduration.
降水积水的严重程度不仅与降水强度相关， 也与累积降水量和降水持续时间的长短有关。
2
When the operating time is constant, the plastic film cover of precipitation is decided by the rainfall duration and daily evaporation.
当操作时间一定时，塑苫的降水量由降水持续时间和日蒸发量决定。
3
The variation of air mean temperature and annual precipitation played a key role in the duration and intensity of cumulative impacts on desertification.