Rainwater plays an important role in the improvement of the drainage performance while leaving the drainage network structure and capacity unchanged.Based on the comparison of rainwater storage performance in projecte...Rainwater plays an important role in the improvement of the drainage performance while leaving the drainage network structure and capacity unchanged.Based on the comparison of rainwater storage performance in projected rainwater drainage systems it shows that the rainwater storage facilities based on the current rainfall intensity computing formulation can improve the drainage system.The results show that the decentralized rainwater drainage network in municipal drainage helps to reduce the designed rainfall intensity capacity in the drainage network.Thus the effect can be equal to increasing the rainfall duration in the rainwater drainage network design.Therefore the rainwater storage facilities in decentralized networks optimize the rainwater drainage network in community rainwater drainage design.It also reduces the capacity of the drainage network and improves the safety of the municipal rainwater drainage system in residential areas.展开更多
The feasibility of rooftop rainwater harvesting （RRWH） as an alternative source of water to meet the outdoor water demand in nine states of the U.S. was evaluated using a system dynamics model developed in Systems T...The feasibility of rooftop rainwater harvesting （RRWH） as an alternative source of water to meet the outdoor water demand in nine states of the U.S. was evaluated using a system dynamics model developed in Systems Thinking, Experimental Learning Laboratory with Animation. The state of Arizona was selected to evaluate the effects of the selected model parameters on the efficacy of RRWH since among the nine states the arid region of Arizona showed the least potential of meeting the outdoor water demand with rain harvested water. The analyses were conducted on a monthly basis across a 10-year projected period from 2015 to 2024. The results showed that RRWH as a potential source of water was highly sensitive to certain model parameters such as the outdoor water demand, the use of desert landscaping, and the percentage of existing houses with RRWH. A significant difference （as high as 37.5%） in rainwater potential was observed between the projected wet and dry climate conditions in Arizona. The analysis of the dynamics of the storage tanks suggested that a 1.0-2.0 m3 rainwater barrel, on an average, can store approximately 80% of the monthly rainwater generated from the rooftops in Arizona, even across the high seasonal variation. This interactive model can be used as a quick estimator of the amount of water that could be generated, stored, and utilized through RRWH systems in the U.S. under different climate conditions. The findings of such comprehensive analyses may help regional policymakers, especially in arid regions, to develop a sustainable water management infrastructure.展开更多
文摘Rainwater plays an important role in the improvement of the drainage performance while leaving the drainage network structure and capacity unchanged.Based on the comparison of rainwater storage performance in projected rainwater drainage systems it shows that the rainwater storage facilities based on the current rainfall intensity computing formulation can improve the drainage system.The results show that the decentralized rainwater drainage network in municipal drainage helps to reduce the designed rainfall intensity capacity in the drainage network.Thus the effect can be equal to increasing the rainfall duration in the rainwater drainage network design.Therefore the rainwater storage facilities in decentralized networks optimize the rainwater drainage network in community rainwater drainage design.It also reduces the capacity of the drainage network and improves the safety of the municipal rainwater drainage system in residential areas.
文摘The feasibility of rooftop rainwater harvesting （RRWH） as an alternative source of water to meet the outdoor water demand in nine states of the U.S. was evaluated using a system dynamics model developed in Systems Thinking, Experimental Learning Laboratory with Animation. The state of Arizona was selected to evaluate the effects of the selected model parameters on the efficacy of RRWH since among the nine states the arid region of Arizona showed the least potential of meeting the outdoor water demand with rain harvested water. The analyses were conducted on a monthly basis across a 10-year projected period from 2015 to 2024. The results showed that RRWH as a potential source of water was highly sensitive to certain model parameters such as the outdoor water demand, the use of desert landscaping, and the percentage of existing houses with RRWH. A significant difference （as high as 37.5%） in rainwater potential was observed between the projected wet and dry climate conditions in Arizona. The analysis of the dynamics of the storage tanks suggested that a 1.0-2.0 m3 rainwater barrel, on an average, can store approximately 80% of the monthly rainwater generated from the rooftops in Arizona, even across the high seasonal variation. This interactive model can be used as a quick estimator of the amount of water that could be generated, stored, and utilized through RRWH systems in the U.S. under different climate conditions. The findings of such comprehensive analyses may help regional policymakers, especially in arid regions, to develop a sustainable water management infrastructure.
