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Wisnu Arya Gemilang
Loka Riset Sumber Daya dan Kerentanan Pesisir
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ASSESSING GROUNDWATER VULNERABILITY USING GALDIT METHOD (CASE STUDY: PADEMAWU SALT POND AREA, MADURA-INDONESIA) Wisnu Arya Gemilang; Gunardi Kusumah; Ulung Jantama Wisha
Jurnal Kelautan Nasional Vol 12, No 3 (2017): DESEMBER
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (942.687 KB) | DOI: 10.15578/jkn.v12i3.6358

Abstract

Groundwater quality pollution in the Pademawu coastal area is very alarming. The major problem is landuse overlapping between salt pond and settlement area which influences environment degradation enhancement. One of negative impacts is groundwater vulnerability in the salt pond area. The salt content enhancement affects some wells become saline around the settlement area which proves the environment degradation has occurred. This study has aim to determine the groundwater vulnerability level in Pademawu coastal area. We employed GALDIT method to assess the groundwater vulnerability level by which calculates the six GALDIT parameters such as groundwater occurrence aquifer type, hydraulic conductivity, level above mean sea level, distance from coast, impact of existing intrusion and aquifer thickness. We divided the groundwater vulnerability into 3 classes, which are high, moderate, and low vulnerability. The sensitivity analysis result shows that the distance between groundwater source and the coast (D) has reached 74 % which tremendously influences the groundwater vulnerability level. The high level of vulnerability is found in the area near the coast and salt pond which deteriorated towards north. The limitation of groundwater utilization and salt pond area in Pademawu coastal area is one of the precise ways declining the intrusion of sea water to the groundwater quality condition.
KARAKTERISTIK SEBARAN SEDIMEN PANTAI UTARA JAWA STUDI KASUS: KECAMATAN BREBES JAWA TENGAH Wisnu Arya Gemilang; Guntur Adhi Rahmawan; Ruzana Dhiauddin; Ulung Jantama Wisha
Jurnal Kelautan Nasional Vol 13, No 2 (2018): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1081.747 KB) | DOI: 10.15578/jkn.v1i2.6456

Abstract

Dinamika kawasan pesisir mencakup proses erosi dan sedimentasi merupakan hal penting untuk mengetahui kondisi pantai. Pesisir Kecamatan Brebes merupakan salah satu kawasan di Pantai Utara Pulau Jawa yang memiliki dinamika perubahan pesisir sangat fluktuatif. Studi sebaran jenis sedimen yang dilakukan secara terpadu di perairan Kecamatan Brebes ditunjukkan untuk memberikan gambaran proses transportasi dan pengendapan sedimen berdasarkan distribusi ukuran butir sedimen. Penelitian dilakukan dengan pengambilan sampel sedimen dasar perairan secara acak dan tersebar di sepanjang pesisir dengan metode grab sampler, kemudian dilakukan analisis lebih lanjut dengan metode granulometri. Hasil penelitian menunjukkan bahwa secara umum, pola sebaran sedimen permukaan dasar laut Kecamatan Brebes didominasi oleh sedimen berukuran lempung-pasir. Jenis sedimen berdasarkan ukuran butirnya yaitu pasir, pasir lanauan, lanau pasiran dan lanau. Kondisi hidro-oseanografi yang fluktuatif memberikan nilai sortasi buruk hingga sedang. Dominasi ukuran halus tersebar pada bagian Timur wilayah kajian, sedangkan fraksi kasar tersebar dibagian Barat dekat dengan laut Jawa. Kondisi tersebut menjadi faktor utama yang memicu erosi dibagian pesisir Kecamatan Brebes.
Coastal Vulnerability Index Modeling for Western Coast of Pangandaran Ruzana Dhiauddin; Wisnu Arya Gemilang; Koko Ondara; Uung Jantama Wisha; Guntur Adhi Rahmawan; Gunardi Kusumah
Jurnal Segara Vol 15, No 2 (2019): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1312.148 KB) | DOI: 10.15578/segara.v15i2.7001

Abstract

Western coast of Pangandaran Sub-district became a popular destination either for domestic or international tourists since it offers many attractive activities and is supported by plenty of hotels, homestays, restaurants and other facilities. However, those advantages were not related with environmental condition, which is characterized by erosional features and dilapidated semi-permanent buildings in several areas with insufficient numbers of coastal protection structures. The combination of poor protection in highly exploited beach pose a threat to local residents, tourists and also the environment. This study is aimed to assess the risk that is faced by Pangandaran Bay. We apply vulnerability assessment in western coast of Pangandaran by integrating two methods: Smartline and CVI (Coastline Vulnerability Index). The result shows the coastal vulnerability index for the study area ranges from 16.43 to 129.9 that are classified into 5 categories; 1) Very low (0.4 km, Sodonglandak Headland - Parigi Bay), 2) Low (0.7 km of Parigi Bay), 3) Moderate (1.2 km, west - east part of Parigi Bay), 4) High (0.3 km, south of Pangandaran Village), and 5) Very High (2.1 km, Pangandaran Village - Pananjung Village). The result of this study is imperative for local governments and stakeholders as a basis for further coastal developments in the western coast of Pangandaran in term of tourism.
Co-Authors Gunardi Kusumah Gunardi Kusumah Guntur Adhi Rahmawan Ilham . Koko Ondara Nia Naelul Hasanah Ridwan Ruzana Dhiauddin Ulung Jantama Wisha Uung Jantama Wisha Zainab Tahir