针对东北地区寒地水稻洪涝灾害损失严重且缺少灾害损失的量化评估方法和技术，为此研究建立水稻灾损量化综合评估方法，在水稻安全生产、合理种植、结构调整以及保障国家粮食安全和推动农业经济可持续发展中具有重要的科学意义和实际应用价值。目前，对于寒地水稻洪涝灾害影响的研究比较分散，在致灾机制、致灾阈值指标、灾损量化等方面仍不十分明确，导致水稻洪涝灾损和风险评估成为一大难题，在洪涝发生后无法实时提出科学评估方法。本研究基于长序列历史资料，采用模拟试验、数理统计、风险评估、作物模型、遥感诊断、分布式水文模型等方法，研究揭示主致灾因子变化特征和规律，明确洪涝灾害致灾机制；确立寒地水稻洪涝致灾的阈值指标及不同程度灾损的量化评价指标体系；建立寒地水稻洪涝风险评估模型；建立自然条件下寒地水稻洪涝灾损的综合评估方法，以期为实现水稻洪涝灾害影响的实时评估提供技术方法，也可为其他同类研究提供方法参考。

A comprehensive quantitative assessment method that will be established in research to roundly assess how much casualty loss aims at serious flood disaster and less ways and techniques of quantization casualty loss,it has important scientific significance and practical application′s value in safety production of rice,plantation in plan, structural adjustment,guarantee stational food safety and promoting sustainable agricultural economic development.   At present, many studies don’t focus on japonica rice flood disaster in the northeast area, such as disaster mechanism, index threshold, quantitative evaluation of production losses and risk assessment, which is still not very clear. So there isn’t a set of threshold indicator, quantitative evaluation index of losses and comprehensive evaluation method which leads to a flood losses assessment that becomes a big problem, and scientific evaluation method can’t be put forward after flood. Based on historical data, by using the simulation experiment, mathematical statistics, risk assessment, crop model and methods of satellite remote sensing, distributed hydrological models, this research will reveal change characteristics and regularity of the main factors of flood, and will clears disaster mechanism of floods. It will establish threshold index and different degree of losses of quantitative evaluation index system of japonica rice flood. It will establish risk assessment method of japonica rice flood. Finally, this research will set up comprehensive evaluation method of flood losses of japonica rice in the northeast area, In order to realize offering technique to evaluate flood disaster influence in time and reference to others same researches.