洪水风险图绘制是防洪减灾工程措施中的一种重要方法，不但可以有效的减轻洪水带来的灾害损失，而且可以为及时掌握洪水灾情提供预测，本文运用GIS反演技术，建立水力学洪水演进模型进行洪水风险分析，对蓄滞洪区进行危险程度分区，并计算不同运用情况下的洪水淹没范围，经过渲染后的图层叠加获得鄱阳湖蓄滞洪区洪水风险图，鄱阳湖蓄滞洪区风险图的绘制将为各级水利防汛指挥机构的抗洪抢险救灾行动提供决策依据，也为合理的制定和实施蓄滞洪区长效管理机制提供科学依据。

Drawing flood risk map is an important way in flood mitigation project. It not only can effectively reduce losses caused by flooding, but also provide flood forecasting in time. In this paper, use the inversion technology of GIS , establish the flood model for flood risk analysis, for flood storage and detention areas partition dangerous degree, and calculate the flood region risk map in different application. The flood risk map can provide basis for decision making by flood-control headquarters at all levels, and also can provide a scientific basis to create a long-term management mechanism for the flood storage and detention areas.