Quantification and integrated modeling of water(quality ＆ quantity) and energy circulations in forests

本研究旨在建立水、能循环与物质循环相结合的研究，促进森林环境影响评价的研究。具体而言，就是对森林(小流域尺度或中尺度2~20公里)的各个循环进行定量化分析，理清水、物、能循环之间的关系，建立水能循环的综合SPAC模型。在九州大学森林研究所福冈实验林中，我们以水能循环监测为实验研究现场，进行联合监测研究，开展了以下课题：(1)定量监测与水、能循环相关的各种因素；(2)根据观测数据建立理论模型，利用模型对现象进行模拟和概括。(3)利用蒸散量、潜热和土壤水分等相容因子，明确水能循环之间的转换系统；(4)建立森林水能循环综合模型，以评价森林的环境效应。该模型与其他以观测为基础的子模型将用于评价森林的环境影响。

This research has been conducted to establish the studies connecting water and energy cycles with material cycles and promote the studies on evaluations of environmental effect of forests. Concretely, it is to quantitatively analyze each cycle in the forests (small basin scale or meso-scale of 2〜20km), clear the relationship among the cycles of water, material and energy and establish an integrated SPAC model of water and energy cycles.In the Fukuoka Experimantal Forests of the Institute of Kyushu University Forests, we made the experimental study site to monitor water and energy cycles to conduct joint monitoring studies and carry out following subjects :(1) Quantitatively monitor the various factors related to water and energy cycles,(2) Establish the theoretical model based on the observation data and simulate and generalize the phenomena by the model,(3) Clarify the conversion system between water and energy cycles using the compatible factors such as evapotranspiration, latent heat and soil water,(4) Establish the integrated model of water and energy cycles in order to evaluate the environmental effect of forests.Although there remain some more problems to be solved in these subjects, we made an integrated model to simulate water and energy cycles. This model along with other sub-model based on the observation will be of use to evaluate the environmental effects of forests.