The precision of the flood prediction is very important to more and more realtime flood prediction systems and flood control decision support systems in many river basins.
对于越来越多流域建立的实时洪水预报系统和防洪决策支持系统，洪水预报的精度是非常重要的。
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.
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。
It is pointed out that remote sensing monitoring and analysis of flood situation of river basins is an important aspect of the technique applied to flood control and disaster mitigation.
介绍了遥感技术在洪涝灾害监测评估中的作用以及目前的应用状况，指出针对流域洪水汛情的遥感监测分析是遥感技术在防洪减灾应用中的一个重要方面。
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