Modeling the impact of human activity on water cycle and its incorporation to water cycle model

水循环建模是制定水资源规划或流域管理规划的基础。建立人类活动对水循环的影响模型并将其纳入水循环模型是水循环模型发展的重要内容。特别是水田水循环模型的建立是水田水循环研究的重要课题。目前提出的水田径流模型主要分为两类：(1)模拟长期径流，考虑灌溉和排水，但简化洪水路径的模型；(2)考虑水田与水系堤防溢流相互作用的短期洪水径流模拟模型。本文将复杂槽模型和扩散槽模型结合起来，建立了一种新的水田径流模型，这两种模型分别是水田径流的代表模型。然后，利用OHyMoS（面向对象水文建模系统）建立了新的水田径流要素模型，并将其应用于日本Kizu河流域。

Modeling water cycle is fundamental to make a water resources plan or watershed management plan. For a development of water cycle model, it is very important to model the impact of human activity on water cycle and incorporate it to a water cycle model. Especially, to model the water cycle of paddy fields is the most important issue.Paddy field runoff models proposed until now are mainly classified into two groups : (1)models which simulate long-term runoff taking into account irrigation and drainage, but simplify the flood routing ; (2)models which simulate short-term flood runoff taking into account the interaction caused by the overflow on a levee between a paddy field and a stream network. In this paper, we develop the new paddy field runoff model integrating the Complex Tank Model and the Diffusive Tank Model, which are representative models of each group, respectively. Then, we build the new paddy field runoff element model by using OHyMoS (Object-oriented Hydrological Modeling System), and apply it to Kizu River basin in Japan.