ABSTRACT; The concrete revetments are changed to hottest condition in the summer on the Tokyo Metropolitan.The peak of the temperature reaches 50 deg. on the concrete revetments. This paper is the study on the heat island effect of the river institutions, from the mitigation of gradual decrease to the heat of the riverside land on the Naka River by the revetment sprinkling and the revetment planting. The results are summarized into 2 points as follows. 1) The covering on the concrete revetments by the green this case, the surface temperature of the revetments decreases 2.3 deg.on the average of the experiment term.2) The sprinkling on the concrete revetments by the pump-up of the stream this case, the surface temperature of the revetments decreases from 4 to 6 deg. on the under 1 hour.

No abstract

Abstract:This paper describe the characteristics of the floodways in Japan through the history of their development . The object channels are 327 that the all floodways to be called in Japan today . A research adopts the method that inspects the attribute of the floodway individually in the outlet form, the diversion structure and the development year etc . As the second step, the correlation of each attribute had been considered. As a result , it was found that the Otozu River is oldest in the history of the floodway development, in the channels that discharges only flood that exist .

The lzu Bonin Islands are a group of volcanic islands that project into the Pacific Ocean from the Japanese Archipelago. On the islands, various methods to improve water resources that are peculiar to isolated islands, for example the use of water from mountain streams, have been developed since the modem age.However, the actual conditions of water use development on the islands have never been thoroughly researched and compiled into a report.This thesis deals with the characteristics of the adjustment of the shortage of water based on the examination into the history of water use development and the balance between water supply and demand on each of the islands.

The main objective of this study announces characteristics of flood control on the Shin River from the viewpoint of flood control history of the Shonai River and comparison of flood diversion channel. The Shin River is the channel which located in the right bank of the Shonai River and flow in the Ise Bay. The results is summarized into 2 points as follows. 1) The Shin River is a special channel which has tributary basin in the type of flood diversion channels like a branch .2) The flood of tributary basin on the Shin River have been controlled in ring levee . and river land of tributary river at Edo era. This method for controlling flood of tributary was abandoned after Meiji, in addition , the discharge of flood on the Shonai River into the Shin River have been continued.