近年，都市化の進行により，局所的な高温化現象や空気環境汚染などの問題が生じている。局所的な高温化現象は主に排熱や人工被覆面の増加などの人為的な要因によることが多く，早急な対策が求められている。%The purpose of this study is to clarify the effect of agricultural irrigation pond on temperature. The irrigation ponds of which the measurements were carried out are located in Kakogawa city, Hyogo prefecture. Temperature, humidity, water temperature, and wind direction and speed were measured. The measurements were carried out from the beginning of July to the end of August in 2004. According to those measurements mentioned above, several results were obtained as follows. First of all, the tendencies of the temperature formation are different especially in the daytime when the main wind direction is different. In addition, the wind direction can be separated into 2 types. One is from the landside. The another is from the seaside. Furthermore, the landside wind makes the temperature rise and seaside wind makes the temperature drop. Secondly, the difference of the temperature, formed at windward and leeward of the irrigation pond, shows its effects as cool spot in the daytime and heat spot at night. Thirdly, the factors which cause the temperature differences between windward and leeward are grasped by multiple linear regression analysis. As the results, it is clarified that the difference between the temperature and water temperature affects the formation of temperature between the windward and the leeward at the irrigation pond.
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