面雨量峰值出现时间与洪峰的出现时间之间存在着一定的滞后关系，一般是小流域滞后的时间短，而大流域滞后的时间长。
The lag time of the flood peak behind the peak of heavy area rainfall is shorter in small river basins than that in large basins.
活动属性包括活动编码、先行活动、后续活动、逻辑关系、提前量和滞后量、资源需求、强制日期、约束条件和假设条件等。
Activity attributes include activity codes, predecessor activities, successor activities, logical relationships, leads and lags, resource requirements, imposed dates, constraints, and assumptions.
使用时应注意海平面变化的区域性、海滩发育的滞后性和海滩蚀退因素间的权重关系。
Please pay attention to the weight relations among regional characteristics of the sea level changes, the lagging-behind of the beach development and beach retreat due to erosion.
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