Rainwater Society Initiative Projects -Promoting De-Centralized - PowerPoint PPT Presentation

Rainwater Society Initiative Projects -Promoting De-Centralized Water Management Subsystems-

Background (Project Target) : Urban Water Management Problems • Un-sustainability in water/ Floods/ Droughts/ Water shortage in time of earthquake disaster / Environmental degradation/ Heat-island phenomenon • Social Challenges: Community degradation related to water/ Loss of opportunities to touch and play with living nature/ Un-pleasant society �������������������������� • ������������������������ ⇒ ��������������������������� ⇒ ������������������������������ ⇒ ������������������������������������������������������������� • ������������ ： ���������������������������������������������������������������������������� ������������������������������� ⇒ ����������������������������������������������������������������������������������� Challenges resulted from Past actions: • Conventional Approach of Water Management ： Neither handle unexpected situations nor expand coverage areas due to the fact that current water management system is too huge and unchangeability. • While populations is decreases, is it possible to keep O&M costs of water management infrastructures. • Comprehensive flood controls and water management only succeeded in new development. It has not succeeded in existing urban areas. Flood control actions didn’t spread due to its single purpose.

Background: Current society that un-recognizes water management systems Due to feature of the current rainwater management system that bury rainwater pipes into the ground, people cannot recognize how rainwater discharge through their living environment, therefore it makes difficult to evoke people’s interest and understanding about the better rainwater management system. Separate sewerage Rainwater inlet Road Rainwater Wastewater Rainwater pipe to a river when floods to a treatment plants Sewer pipe

A proposed vision: Rainwater Society We define “Rainwater Society” as a society that under the de -centralized water management system, multi-generational people cooperate to store, infiltrate, and harvest rainwater and increase green spaces at everywhere in a watershed region. Focusing on water which feature is multi-faceted, we envision Rainwater Society as a model of modern social problem-solution method. Rainwater Society should be continually transformed and improved by multi-generational co-creation. Delay runoff Rainwater Rainwater Harvesting Storage Raingarden Raingarden Infiltration Infiltration Infiltration inlet Rainwater pipe to a river Sewer pipe to a treatment plants when floods

Project team: Labs of Rainwater Society ・ Kyushu University Faculty of Engineering, ・ Kyushu Sangyo University Faculty of Engineering ・ Fukuoka University Faculty of Engineering ・ Fukuoka Institute of Technology Faculty of Social and Environmental Studies ・ The University of Tokyo graduate school of Frontier Sciences ・ Kumamoto University Faculty of Advanced Science and Technology ・ Tokyo Gakugei University Field Studies Institute for Environmental Education And Fukuoka Association of Architects & Building Engineers

Team organization  Cha-kai （ community tea party ）  Education about rainwater Group to promote management  Rainwater Center cooperation among multi-generations  Create a watershed-scale network  Train a rainwater coordinator  Policy recommendations Group to develop Group to create and innovate a network among element technologies stakeholders  Propose a new water management system  Innovate element technologies Group to  Implementation and appraisal gather the threads  Community based flood control of people's story simulation  Pictorial map of memories  Evaluate an ecosystem service  Visualize water management systems

Spread the Concept of Rainwater Society Spread the concept of Rainwater Society to multi-generations by education and workshop Amamizu (rainwater) Rangers Kids in kindergarten Workshops for adults Environmental education

Open Rainwater Centers Two centers have been launched. Rainwater Science Center Convivial Center for Rainwater Harvesting

Networking and Human Resource Cultivation Founding an network to cooperate with stakeholders. Training Rainwater Coordinators.

Re-evaluate the Capabilities of Infiltration • The capabilities of infiltration in green spaces could be re-evaluated. • Take advantage of the capabilities of infiltration is basic technique for run-off reduction. Asphalt Ground Lawn Shrub Ever- Ag. Deciduous green Field trees Forest Forest

Invent a rainwater tank with adjusting hole Implement a 3.7m3-size tank with adjusting hole for floods control Outcomes: Cutting peak runoff / Downsizing tank/ Clarifying the capacity of floods control and water use [Conventional [Tank with • Ensure a certain amount tank] adjusting hole] of capacity for floods control • Runoff control by Floods adjusting hole size control Floods • Increase amount of control capacity for floods runoff Water Water control while keep tank use use size small inflow runoff inflow runoff

Innovate a Tool to Measure the Capacity of Infiltration Infiltration capacity measuring equipment which is simple way and easy to use. People can understand infiltration capacity using this tool.

Existing single family house model Convivial Center for Rainwater Harvesting Implementation 50years old single house model which infiltrate and harvest all amount of rainwater in this site. Garden&Stream Storage cases Kame(pots) Rainwater foot bath

Rainwater use, for bathroom Emergency 民区的 rainwater storage infiltration Rainwater Use Foot bath Rainwater use Strage case infiltration Pipe for infiltration WATER CIRCULATION TYPE BIOTOPE

Implementation/Evaluation （ In progress ） • Existing Apartment House / Rainwater storage on rooftop and water use at each balconies. • Existing Affordable housing / Urban farming with rainwater use. • Japanese art of archery field / Soil improvement and Implementing Trench. • Road in a campus / Introducing and infiltrating rainwater to plants in roads. • Implementing various soils for reevaluating the capabilities of infiltration. • Existing Junior-high School / Student workshop for planning school renovations. School Renovation Plan Conceptual section of by harvesting rainwater Existing apartment house

Community-scale Floods Control • Hypothesis: “Inland floods” that occur in and around a community could be prevented by community-scale actions. • “Inland floods” often occur locally. Simulating and analyzing inland floods prevention effect by local community-scale actions. By introducing rainwater infiltration and rainwater retention into N1, N2, N3, it is possible to prevent overflow from manhole

Spread Effects to Other Regions Unexpected new citizen movements are occurred.  New River Festival  Cutting downspouts Movement in Machida city,Tokyo Cutting downspouts movement New Festival: River-Firefly