Abstract
This study focused on the rehabilitation plan of water distribution main pipelines. The renewal of water distribution mains will be greatly affected by the scale of construction and water outages, and it’s the plan that entails a heavy burden in terms of technologies and cost. Furthermore, the population of Tokyo is expected to decline after 2025, and demand for water supply will decline in the future too. In the previous research, we proposed the new renewal priority evaluation method that takes into account change of long-term water demand. However, since a structure of water distribution networks has wide varieties of shapes and features depending on the topographical conditions and changes in urban developments, it is necessary to confirm the effectiveness and versatility of the new method of renewal. Therefore, in this paper tried to perform a comparative analysis of the renewal priority order of distribution main pipelines in consideration of future changes in water demand for two water distribution area models with different characteristics and shapes. Pipeline renewal scenarios that created by the renewal priority evaluation method are compared with stable supply and cost as indicators. The results showed the effectiveness and variety of the proposed new method of renewal in this paper.
