Collisions or harsh shifting of earth plates accompanied by an earthquake in the ocean would pose a potential tsunami. The coastal area in Pacitan Bay East Java faces directly to the Indian Ocean and is prone to tsunami disasters. This study aims to determine the vulnerability level of the area and the resilience of coastal communities against tsunamis. The geographic Information System (GIS) method was used in this study. This study applied weighted overlay calculation with four components: elevation, slope, and distance from the beach and the river to measure the vulnerability level. Moreover, Coastal Community Resilience (CCR) method was applied to measure the predictive response of the communities. The results indicated that most of the area in Pacitan Bay (79,70%) was categorised into high to very high vulnerable against tsunamis. The CCR results showed the low index structure design and post-disaster recovery elements.

Abstract. Coastal regions and small islands are areas that will be adversely affected by the phenomenon of sea level rise globally. In general, Sea Level Rise (SLR) will result in coastal impacts as follows: increased frequency and intensity of floods, changes in ocean currents and widespread intrusion of sea water. This research was conducted in Gili Raja Island of Sumenep Madura. Objectives of this research were to demonstrate the ability of combining remote sensing and GIS method to determine the impact of SLR on a small island and to model its scale using different scenario. GIS based run-up model were performed to estimate and predict the impact of SLR to the island's area. Three water level scenario (0.5 m, 1.0 m and 1.5 m) were applied. The results showed that in the first scenario 8.73% of the island was flooded by sea water, furthermore in two other scenario the flooded area was increase significantly (15.88% and 22.38%).

The dynamic increase in human needs results in land changes in coastal areas, threatening the mangrove ecosystem's existence. The mangrove ecosystem in this area can be managed and developed as an ecotourism area to utilize and protect it. It is important to do this research to integrate mangrove forest management by assessing land change in other surrounding areas as a starting point for the study. This study aims to analyze changes in the use of mangrove land and surrounding land on the southern coast of Bangkalan Regency within ten years and analyze the suitability of mangrove land for eco-tourism as an effort to use and preserve it following urban planning. This study uses multitemporal satellite Landsat 7 ETM+ (in 2009) and Landsat 8 OLI (in 2019). Land change classification using Sthe upervised Classification method with accuracy test using the confusion matrix method. The assessment of eco-tourism potential at the research site uses a matrix of land suitability for mangrove eco-tourism. The analysis of changes in mangrove forest cover on the southern coast of Bangkalan Regency showed a growth of 40.48% from 2009 to 2019. The addition of a mangrove area indicates that the forest area has the potential to be exploited. Based on land suitability analysis, mangrove forests in Langpanggang and Modung have the potential to be developed as eco-tourism areas.

Pemilihan lokasi merupakan langkah awal untuk penentuan kegiatan perikanan budidaya laut yang berkelanjutan. Dokumen Rencana Zonasi Wilayah Pesisir dan Pulau-Pulau Kecil (RZWP3K) Provinsi Jawa Timur menyebutkan bahwa kawasan pesisir dan laut yang berada di perairan Selat Madura dan Selat Bali, terutama pesisir Kabupaten Situbondo dan Banyuwangi dialokasikan sebagai wilayah pengembangan budidaya laut. Penelitian ini bertujuan untuk menganalisa karakteristik kondisi perairan Kabupaten Situbondo dan Banyuwangi, khususnya mengenai kelayakan sebagai lokasi budidaya laut. Penelitian ini dilaksanakan pada bulan Juni sampai dengan Juli tahun 2020. Pengambilan data sample air laut dilakukan di titik pengamatan yang tersebar di 15 kecamatan pesisir di Kabupaten Situbondo (Selat Madura) dan Banyuwangi (Selat Bali dan Samudera Hindia). Metode yang digunakan adalah dengan menganalisis parameter kualitas perairan dan menghitung nilai indeks kesesuaian. Selain itu dilakukan pula pendugaan besarnya beban limbah dan analisis komponen utama. Hasil penelitian dapat disimpulkan bahwa lokasi yang sesuai untuk pengembangan budidaya laut di Kabupaten Situbondo terletak di Kecamatan Suboh, Kendit, Arjasa dan Jangkar dengan nilai indeks kesesuaian berkisar antara 63,5-67,5. Sementara untuk Kabupaten Banyuwangi, kawasan yang sesuai untuk pengembangan budidaya laut terletak di Kecamatan Wongsorejo dan Muncar dengan nilai indeks antara 64 -68.5. Estimasi beban limbah menunjukkan bahwa potensi limbah yang terjadi akibat budidaya laut dengan KJA adalah sekitar 0,24 ton N/10 unit karamba. Hasil perhitungan analisis komponen utama menunjukkan stasiun pengamatan memiliki karakteristik nilai parameter kualitas air yang beragam.

Mangrove ecosystems are resources of landscapes, flora, fauna, and local communities that interact with each other. Mangrove ecosystems have important ecological, economic and social functions for coastal development. Conservation is a means of involving the community in mangrove recovery and management activities as a preservation effort. This paper examines the potential of mangrove ecosystems in the southern coast of Bangkalan as a conservation area. The fact, mangrove ecosystems have a pressure that decreased area significantly. Data collection used the quadratic transect method and satellite image analysis. Mangroves on the southern coast of Bangkalan have increased area over the past 10 years. Mangrove vegetation found consisted of 4 families and 8 species. There are also found fauna i.e. insects, snakes, primates and birds. The observations indicated that conservation of mangrove forests on the southern coast of Bangkalan needs to be done. This effort can be supported by ecotourism activities which are expected to improve the community welfare.