Abstract
Erosion control in Lake Batur area is community-based directed to maintain lake balance. The aims of this research is: 1) to obtain a community-based erosion control model, 2) to analyze the role of communities in the application of land management models, 3) to analyze other plant species in collaboration with the arrangement model, and 4) to analyze the impact of terraces blooming against sedimentation. This research is field experiments and surveys, and the sampling was conducted by purposive sampling with 64 samples. The socio-economic support data of the community was determined by 180 respondents by cluster sampling. Interviews and questionnaires were conducted through closed questions on a conventional scale. The characteristics of the lake were analyzed statistically and descriptively by using the SPSS tool. Land mapping was conducted by GPS method with GIS device. Prediction of erosion was by using USLE Model, while sedimentation was measured by the Stanford Sediment model. The analysis shows that the increase of settlement is averagely of 115.85%, plantation is 245.50% and the sedimentation level is 1,017,93 m3/year. Conclusions and outcomes were in the form of community-based terracing model that collaborate with elephant grass and vetiveria plants.
Highlights
The condition of Lake Batur's water volume in Bali continues to decline, the depth of the lake continues to experience siltation, the quality of the lake water continues to decrease and the fertility of the water increases
The process of erosion, sedimentation, and silting of the lake was triggered by the management pattern of agricultural land on the edge of the lake that does not pay attention to the aspects of soil and water conservation
Mining activities located in the area around Lake Batur is mining class C of sand excavation material
Summary
The condition of Lake Batur's water volume in Bali continues to decline, the depth of the lake continues to experience siltation, the quality of the lake water continues to decrease and the fertility of the water increases. The process of erosion, sedimentation, and silting of the lake was triggered by the management pattern of agricultural land on the edge of the lake that does not pay attention to the aspects of soil and water conservation. Mining activities located in the area around Lake Batur is mining class C of sand excavation material. The location of sand mining is in the Village of Songan A. On one hand, this activity will be able to increase the income of the people. It is very detrimental to the landscape, let alone the mining system is not well planned, so it is easy to cause landslides, such as that occurred on February 9th, 2017, that claimed casualties, or create new puddles with mild to severe erosions
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