ABSTRACT : A wind tunnel experiment was carried out to investigate the effects of a windbreak net for the prevention of wind-blown sand movement in coastal cities. In the experiment, sediment deposition rate in a coastal zone was measured in the presence of a windbreak net under various conditions. The optimal location of a windbreak net for prevention of sediment deposition was 20-25H(H : height of a windbreak net) far from the edge of a coastal city in the upwind direction. When a windbreak net was located around the edge of a coastal city, however, it negatively contributed for sediment deposition. In addition, sediment deposition could be greatly suppressed by setting a windbreak sub-net in the downwind direction of the windbreak net.

ABSTRACT : Regional revitalization has become an important policy for this country, with the growing emergence of municipalities touting measures for such policies through the use of ICM. However, it can hardly be said that local authorities have planned adequately for the sustainable use and conservation of coastal areas. The reason for this is that the various individual departments and agencies each have their own legal objectives within their respective jurisdictions, and are prone to functioning independently of each other. For the purposes of this research, which focuses on coastal areas with complicated institutional policies, uses case studies focusing on how municipalities are working to integrate their bureaucratic systems in order to treat waste water from their bathing beaches. The results indicate of integration of individual measures through the regional authorities' integration plans, as well as the influence of residents' opinions are key components in making decisions for cleaning up these coastal areas. Moreover, the research shows that capacity development of local administrations is also essential for integration.

ABSTRACT : Hypoxic water mass often occurs during summer in inner Ariake Bay, and will cause the reduction in the population of bivalves. Aeration techniques have been tested to increase the concentration of dissolved oxygen, but these technologies are not prevailing due to financial reason, usability, etc.

In the present study, an inexpensive and simple technology was proposed to improve hypoxic condition around sea bottom. This technology enables fishermen to supply surface water with rich oxygen to bottom hypoxic layer without any specific heavy equipments. First, laboratory tank experiments were carried out to design the equipment. Then, an actual equipment was developed and tested in the field to verify its operability in the sea. Finally, the performance of the equipment was predicted by numerical computation. By the field trial, the average amount of water supply by the equipment was approximately 14 m³ / min when the equipment was towed at about 1 m/s. According to the effect evaluation which calculated by numerical computation, this technology enables to raise dissolved oxygen concentration to over 2.0mg/L, also to raise dissolved oxygen concentration to over 1.0mg/L in the area of maximum 4 m from the center of the towed line and its duration time of raising dissolved oxygen concentration will be 21.8 seconds. All results above suggests our technology enables to reduce hypoxic condition in the area of 0.0432km² per day per one fishing boat.

ABSTRACT : Northeastern Italy, called “the third Italy” for new innovative industries is attracting the most attention now, while developed countries have problems of the hollowing-out of the economy and industry.

So this research aims to examine land use value of the north Italy for environments of new innovative industries in 21th century. The latter half of the research considers about land use in Ravenna city, Venice city and Chiba city from the view point of developing innovative industries and landscape. This research concluded that allocation of industrial clusters scatteringly is needed for landscape. And new innovative industries seem to be possible because of the good connections with the urban dimension. The possible regeneration depends on the surroundings: Emilia-Romagna and Ravenna are isolated, Veneto and Venice are integrated.