城市山体绿道微气候特征观测方法研究

Study on Observation Method of Microclimate Characteristics of Urban Mountain Greenway

针对以往方法无法精准捕获特征因子,导致观测效果差的问题,提出了数值模拟的城市山体绿道微气候特征观测方法研究。依据城市山体绿道微气候运行机理,利用生态环保方式去调节空间舒适度,采用Envi-met三维微气候数值模拟作为主要观测工具,设置数值模拟基本条件。对影响微气候的空气温度、空气湿度和风向风速三个特征因子进行分析,根据Envi-met软件模型结构,设置输入/输出参数,并将文件格式导入Envi-met图像处理软件之中,获取三维模型图。采用开放式侧边界条件,得到观测项,由此计算感热通量和潜热通量,并对其变化展开分析,由此完成微气候特征观测,并对观测结果进行修正。

Aiming at the problem that the previous methods cannot accurately capture the characteristic factors, which leads to poor observation effect, a numerical simulation method for observing the microclimate characteristics of urban mountain greenway is proposed. According to the microclimate operation mechanism of urban mountain greenway, the spatial comfort is adjusted by the way of ecological environment protection. Envi-met three-dimensional microclimate numerical simulation is used as the main observation tool, and the basic conditions of numerical simulation are set up. Based on Envi-met software model structure, input/output parameters are set, and file format is imported into Envi-met image processing software to obtain three-dimensional model map. By using the open side boundary condition, the observational items are obtained, and the sensible heat flux and latent heat flux are calculated, and their variations are analyzed. The observation of microclimate characteristics is completed and the observational results are corrected. Experiments were carried out under the instrument of microclimate observation tower.