DRAINMOD模型研究与应用进展

Research and Application Progress of DRAINMOD Model

建立有效的水文模型对指导小尺度排水系统设计具有重要意义。从水文特性、氮素运移、盐分运移和模型耦合4个方面总结DRAINMOD模型模拟原理及模型关键参数灵敏度,系统回顾了DRAINMOD模型及其耦合模型的国内外应用进展,并对模型存在的局限性和发展趋势进行探讨。指出DRAINMOD在农田排水、排氮和降渍领域模拟性能良好;在寒冷地区和城市雨洪调控方面的适用性还需要进一步检验和研究。研究认为DRAINMOD模型未来的重点研究方向可以概括为:①模拟磷素、有机微污染物和重金属元素等的运移状况和对土壤、作物的影响;②积雪融雪的机理研究及模型在寒冷地区的应用;③模型在城市雨洪调控设施建设中的应用。

Establishing an effective hydrological model is important for guiding the design of small-scale drainage systems. The simulation principle and the sensitivity of key parameters of DRAINMOD model were summarized from four aspects:Hydrological characteristics, nitrogen transport, salt transport and model cooperation. The research application progresses of DRAINMOD model and its coupled model at home and abroad were systematically reviewed,and the limitations and development trends of the model were discussed. It is pointed out that DRAINMOD model has good simulation performance in the fields of agricultural drainage,nitrogen removal and stain reduction. In the simulation of cold area or urban stormwater regulation,domestic research needs to reference from foreign research results. The research suggests that the key research directions of DRAINMOD model could be summarized as the following aspects:①Simulating the migration of phosphorus,organic micro-pollutants and heavy metal elements and their impacts on soil and crops;②Mechanism research on the freezing-thawing of snow and application in cold regions;③Application in the construction of urban stormwater regulation facilities.