Study on Atmospheric Environment Around River

河流周边大气环境研究

• 批准号: 04650452
• 负责人: KOBATAKE Shigeki
• 金额: $ 1.02万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650452/
• 关键词: River Front; Temperature Environment; Micro Meteorology

The cooling effect of river on atmospheric temperature around rever in summer is a well known phenomenon in qualitative respect, but not in a quantitative respect. To evaluate quantitatively, the physical model describing the transport process of momentum and heat is necessary. For construction of the model, wind velocity, temperature and humidity were observed around River Watarase and River Kyuryu. The temperature of river side was 2-3 ﾟC lower to compared to urban area. The turblence thermal diffusion coefficient of vertical direction was order of 10^<-1> m^2/sec. In addition to observations described above, some experiments were carried out in wind tunnel having 90x90 cm cross section. A river channel is simulated by a long square pipe (12.5x8 cm cross section), and dry ice was set inside of this pipe as cooling source. Both side of this pipe, heat insulating material covered with artificial lawn as surface roughness were installed as river side area. Wind velocity was measured with 2- dimensional hot-film anemometer. Change of value of Reynolds stress and eddy viscosity, and of their profiles were analyzed in combination with experimental conditions of cooling and wind velocity.

夏季河流对长江口附近大气温度的冷却作用是一个定性的现象，但在定量方面还不清楚。为了进行定量评价，必须建立描述动量和热量输运过程的物理模型。为了构建模型，观测了渡濑河和久流河周围的风速、温度和湿度。河边的温度比市区低2-3摄氏度。垂直方向的湍流热扩散系数为10^<-1>m^2/sec量级。除了上述观察外，还在截面为90 × 90 cm的风洞中进行了一些实验。通过长的方形管（12.5x8cm横截面）模拟河道，并且将干冰设置在该管内作为冷却源。在管道的两侧，安装了隔热材料，并在表面粗糙的人造草坪上覆盖，作为河边区域。风速测量采用二维热膜风速仪。结合试验的冷却条件和风速条件，分析了雷诺应力和涡动粘滞系数的变化及其廓线。

项目成果

小葉竹 重機: "河川周辺の大気環境に関する研究" 水工学論文集. 第37卷. 817-820 (1993)

小畠重装：《河流周围大气环境研究》水利工程论文第37卷。817-820（1993）。

Shigeki Kobatake, Yoshihiko Shimizu, Ritsuko Aoki, Fumika Hayasaka: "Observational Research of Atmospheric Environment Around River" Proceedings of Hydralic Engineering, JSCE. 37. 817-820 (1993)

Shigeki Kobatake、Yoshihiko Shimizu、Ritsuko Aoki、Fumika Hayasaka：“河流周围大气环境的观测研究”水利工程学报，JSCE。

Shigeki Kobatake, Yoshihiko Shimizu, Ritsuko Aoki, Fumika Hayasaka, You Ando: "Experimental Study on Cooling Effects of River using Wind Tunnel" Proceedings of Hydralic Engineering, JSCE. 38. 393-400 (1994)

Shigeki Kobatake、Yoshihiko Shimizu、Ritsuko Aoki、Fumika Hayasaka、You Ando：“利用风洞对河流冷却效果的实验研究”水利工程学报，JSCE。

小葉竹 重機: "河川周辺の大気環境に関する研究" 水工学論文集. 第37巻. 817-820 (1993)

小畠，重型设备：“河流周围的大气环境研究”，水利工程学报，第 37 卷，817-820（1993 年）。

小葉竹 重機: "風洞を用いた河川周辺の大気環境に関する実験的研究" 水工学論文集. 第38巻. 393-400 (1994)

Kobatake，Juuki：“利用风洞进行河流周围大气环境的实验研究”水利工程学报，第 38 卷，393-400（1994 年）。