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<p>The rapid development of Balikpapan City has an impact on the increasingly high demand for land for urban expansion needs. The expansion of Balikpapan City is more directed towards coastal areas which are dominated by mangrove forests. This study discusses the destruction of the mangrove forest and its causal factors and how conservation efforts are being carried out to maintain sustainability. Mangrove forest damage data obtained through surveys and image analysis using NDVI. While the factors causing the damage to mangrove forests were obtained from observations and interviews with the mangrove center manager of Balikpapan. The results showed that there were many mangrove forests that had rare or already damaged that were spread in the West Balikpapan, North Balikpapan, and East Balikpapan Sub-district. This damage is caused by natural and non-natural factors. Natural factors that cause damage to mangrove forests are pests and sedimentation. The non-natural factors are due to the pollution and the opening of fish ponds. Preservation efforts are carried out by replanting mangroves which are only carried out by the mangrove center and some CSR and environmentalists and do not involve the community at large. These Conditions make the mangrove forest in Balikpapan City threatened its sustainability.</p>

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Fieldwork has been widely known to be important in Geography and other disciplines. Fieldwork was described as an outside activity where students can see and hear the geography phenomena in the field. It was also believed that fieldwork was an essential way to gain a better understanding of geographical objects. Some previous research had shown the advantages of fieldwork for students. Combining fieldwork and research was possible to gain students' understanding of disaster risk reduction in the school community especially in the disaster-prone areas. This research aimed to know the effect of fieldwork and research on undergraduate geography education' students understanding of disaster risk reduction in the school community. Students engaged in field work and research activities in the southern part of Klaten Regency Central Java Indonesia, which is vulnerable to various disasters such as earthquakes, floods and landslides. The students were evaluated before and after fieldwork using questionnaires. The result showed that fieldwork and research improved students' understanding of disaster risk reduction.

Tujuan dilakukannya pengabdian masyarakat ini sebagai upaya mitigasi bencana banjir di Kelurahan Sewu dengan memanfaatkan teknologi sederhana berupa pembuatan Lubang Resapan Biopori (LRB). Melalui pembuatan LRB ini diharapkan mampu meningkatkan pengetahuan dan sikap masyarakat dalam mengurangi risisko terjadinya bencana banjir. Kegiatan yang dilaksanakan dalam pengabdian ini berupa sosialisasi kepada masyarakat dan demonstrasi pembuatan LRB serta menjadikan LRB sebagai media pembuatan pupuk kompos dari sapah organik. Pengabdian pada masyarakat ini dilaksanakan pada bulan April sampai Juni 2019 di Kelurahan Sewu Kota Surakarta. Luaran dari program ini yaitu menjadikan masyarakat mengerti akan manfaat yang didapat dari pembuatan LRB, selain itu menjadikan masyarakat mengerti bagaimana upaya mitigasi bencana banjir tidak hanya sekedar teoritis, memanfaatkan lahan pekarangan sebagai lokasi LRB. Hasil pengabdian menunjukkan bahwa tingkat pengetahuan masyarakat terhadap bencana banjir mengalami peningkatan sebesar 12%, namun dalam implementasi kegiatan mitigasi bencana banjir, masyarakat perlu dampingan agar berperan aktif dalam mitigasi banjir.