Tasikoki coastal protection
Sea level rise is a major problem in Indonesia with disastrous consequences at the local level. Tasikoki beach, located next to the Wildlife and Rescue Center, has partly lost 18 meters of coastline over the past 15 years. Since this trend will most likely be continued, we are forced to do something about this as soon as possible.
Photo 1. The Tasikoki Coastal Protection research team from the TU Delft
We, the TU Delft Tasikoki Coastal Protection research team, have started this assignment since February. Our team, consisting of Hydraulic Engineering, Construction Management and Offshore Master’s students, will work on this for 10 weeks.
Mapping the area
The first five weeks have now flown by. The first half of the survey consisted of mapping the area. Then investigating the causes of erosion, taking measurements and processing data. In collaboration with the local university, Institut Teknologi Minaesa from Tomohon, we performed the measurements. We also shared our knowledge and methods. Combinations of home-made and advanced measuring equipment have been used to collect the entire range of data on and around the beach.
Photo 2: The mapping of the soil profile was partly carried out with home-made equipment
Solutions
To work towards relevant solutions for Tasikoki beach, we use a model that reflects the dynamics of the coast. With this we test the effects of the possible solutions on the development of the coast in the short and long term. In addition to the consequences for the development of the coast, the solutions are tested on the basis of, among other things, costs, feasibility and effects on nature and environment.
Photo 3: After the installation of the measuring equipment, the rest of the seabed is mapped with a local fishing boat
Within the solution framework, we work according to the “Building with Nature” principle. Solutions must be implemented in harmony with existing nature. This in order to preserve and possibly even enrich the current biodiversity on land and in the sea.
Current tasks
The possible solutions are currently being modeled and tested. For the possible solutions, an implementation plan will also be written, so that simple steps towards the realization of the advice can be made. In this way we hope with our expertise to contribute to the protection of the hinterland. This could possibly be applied on a larger scale. The valuable Indonesian coast can with this hopefully be protected for the future in a sustainable and responsible manner.
Photo 4: Soil samples in and around Tasikoki beach are sieved and weighed after an intensive drying process, in order to gain insight into the composition of the soil
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Photo 5: Biorocks is one of the possible solutions. Here off the coast of the Gangga Island Resort, the Biorocks have provided an impressive coastal recovery in recent years
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