PT. Bangun Solusindo Perkasa is a company that provides high-quality building materials and provides reliable services through innovative building solutions, increased efficiency, and efforts to promote a sustainable future. Focusing on the drainage industry by partnering with two drainage principals from Germany, HAURATON & GRAF, we hope to improve the well-being of the clients we serve by combining our experience, technical expertise, and local knowledge. With more than 120 years of combined knowledge and expertise in the industry, we believe we can contribute to sustainable development and improve the places and spaces in which we live, work and play by balancing the opportunities and challenges that affect the urban design and community development. Our approach is to manage surface water by considering the quantity of water to prevent flooding, inundation, and groundwater recharge; water quality to prevent pollution, and aesthetic design of drainage systems by including as many environmentally friendly materials as possible in our products.

Solutions for Welang:

• Water retention

PT. Sumber Djaja Perkasa is one of Indonesia's most recognized plastic manufacturing companies. Since our initial inception in 1965, we always strive to produce plastic products with the highest quality and to provide service that exceed customer expectation. With more than 50 years of experience, we combine the latest cutting-edge technology and skilled engineers to produce high quality innovative plastic products. Our solid reputation and our valued customers' satisfaction have encouraged us to continue setting new standards for excellence in quality, dependability and commitment to both customers and employees.

Sanitation saves lives, but billions of people live without access to even the most basic sanitation services. Globally, 61% of the population (4.5 billion people) lack “safely managed sanitation” – meaning access to a toilet or latrine that leads to treatment or safe disposal of human waste.

Since 2015, we have been working –with a large group of public-private partners– on a dream to get Indonesian village people on lifelong lifesaving water and sanitation, and we developed the world’s most cost-efficient sanitation system in the process, the Safe Water Garden.

Then we realised that with just a little bit of extra effort (from the local people themselves) we could establish a whole WASH revolution, which in turn leads to micro-farming and community tourism.

At the urging of the Gastes foundation, we put together a national scale-up plan (see the timeline here) which not only brings WASH, but a complete uplifting of rural communities, powered by local people themselves (our systems are so simple, with a little training, families can build them themselves in under a day).

Solution for Welang:
- Sustainable farming practices, agroforestry
- Community education (on water conservation)
- WASH

INDYMO is a start-up that works in the field of the management of water resources and water quality. Our focus is on innovative ways of monitoring water quality and ecology using underwater drones (dynamic monitoring) equipped with water quality sensors and a video cameras. Until now we successfully deployed underwater drones in multiple projects in The Netherlands and abroad. Anew drone is currently in the development stage, and our goal is to make it an efficient and powerful tool, suitable for various uses and applications in the field of water.

We are interested in exploring how our technology can contribute to better water management practices in the context of climate change. We believe that, by collecting high resolution spatial data on water quality or, for example, bathymetry, we can support better decisions related with dredging actions, use of water (e.g. for agriculture) or other types of water management.

Solution for Welang:
- Data measurement and management
- Water quality measurement (ecology/bathymetry)

DIJK53 is a young and contemporary consultancy focused on delivering quality and practical value. Our team consists of consultants, project leaders and content specialists. Pioneering is what we like to do and what we are good at. Discovering new roads and possibilities, lots of ideas, a fascination for flood risk management, a substantive drive, a healthy dose of humor, the ability to put things into perspective and, above all, the ambition to actually take great ideas and good plans a step further.

Our company expertise lies within the field of flood risk management. We have extensive knowledge of and experience in flood risk analysis, developing flood prevention strategies (such as Room for the River), policy and decision making, levee assessment and hydraulic engineering. Furthermore, we have experience in working on flood risk related projects in Indonesia such as Jakarta and the Banger polder in Semarang.

Solution for Welang:
- Water retention
- River widening
- Check dams
- Building with Nature

Rebel is an international financial economic consultancy with ample knowledge and experience in climate resilience projects, including river basin management and flood protection projects. We seek to make positive impact through our advisory services and investments at the interface of the public and private sector, where social values and private entrepreneurship meet.

Solution for Welang
- Infrastructure financing
- Economic and financial assessment of potential solutions

The Hague Academy is a non-profit, non-governmental organisation established by VNG International in 2006, and with the support from the municipality of The Hague. The Hague Academy for Local Governance specialises in practice-oriented training courses and study visits for civil servants, local practitioners, and professionals at donor and development organisations.

Leaders at the local level must demonstrate responsibility, responsiveness and a clear vision for the future of their communities. Moreover, they need skilled people to manage and deliver services in a transparent and effective way. To achieve this, citizens should have the capacity to put forward their needs and ideas to improve their community and hold their governments accountable.

Through training and education programmes, we seek to develop knowledge and skills required to improve local governance and decentralisation in developing and post-conflict societies.

Solution for Welang:
- Reforestation actions
- Ecosystem services
- Nature-based solutions
- Community education (on soil and water conservation)
- Inclusive water governance
- Citizen participation in river basin management

PT. Jauhar Hidro Mekatron was founded on June 17th, 2008. This company was formed due to the increasing need for precise, accurate, and valid data obtained in an efficient way. Technological discoveries that are getting more advanced every day and the lack of application in society as well as the use of abundant natural resources make our motivation in establishing PT. Jauhar Hidro Mekatron.

This company was built with a very strong foundation on science and motivation in managing natural resources in a sustainable manner. Our goal is to serve as a bridge for science and technology, as well as aleading company to improve people's welfare through environmentally friendly technology in the exploration and management of available natural resources.

Solution for Welang
- Sustainable farming practices, agroforestry
- Ecosystem services
- Community education (on soil and water conservation)
- Early warning system (EWS)
- Data management