Ecosystem-based adaptation at scale through Building with Nature - Towards resilient coasts in Indonesia
As of: December 2020
Indonesian coasts suffer from erosion, caused by sea level rise, mangrove conversion for aquaculture and groundwater extraction. In some places kilometers of land are lost and this will exacerbate with climate change. Over 30 million people in Java alone are at risk. Hard structures like sea walls are ineffective in mud-coasts, expensive and unable to adapt to climate change. Furthermore, they fail to provide the economic, environmental and social services that healthy ecosystems offer. Using a Building with Nature approach the project combines ecosystem based solutions like mangrove restoration with engineering. We aim to mainstream the Building with Nature approach in coastal management across Indonesia for climate change adaptation and to implement a large pilot in Central Java to catalyse change.
State of implementation/results
- The program Building with Nature (BwN) engages with 10 community groups across 9 villages along the northern coast of Demak
- Within the technical and socio-economical BwN approach, 2.6 km permeable dams to enhance sedimentation were built.
- Additionally, 1,16 km of rehabilitation measures had to be conducted as the permeable structures were damaged faster than anticipated.
- Nonetheless, the observed sedimentation rates are good and the mangroves are recovering.
- First steps to adjust and implement the biorights mechanism in the Demak setting were introduced.
- In Banten Bay a small-scale demonstration site was established, which thanks to its strategic location close to Jakarta, is receiving many visitors.
- Best aquaculture practices introduced through Coastal Field Schools on over 400 ha have been very successful and significantly increase aquaculture productivity and income.