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中、小型水库的洪水预报，由于流域面积小，江流时间短，不宜进行复杂的计算，一般采用洪水预报综合相关图法进行预报O这种方法是把入库洪水预报相关图，与简易调洪演算三角形图解法综合在一起，绘制简单，使用方便。洪水预报综合相关图采用四象限制（详见附图）。第一象限人库
Flood forecasting of medium and small reservoirs is not suitable for complicated calculation due to small area of river basin and short time of river flow. It is generally predicted by integrated forecasting method of flood forecasting. Flood calculation triangle diagram together, drawing simple, easy to use. Four-quadrant limit is used for the comprehensive correlation map of flood forecast (see the attached figure). First quadrant library