Rona Lingkungan Geologi Kelautan Di Perairan P. Rote Nusa Tenggara Timur

Abstract

Sejalan dengan perubahan Pulau Rote dari Pemerintahan Kecamatan menjadi Kabupaten, pembangunan infrastruktur pesisir dan sektor lainnya di pulau ini meningkat. Pembangunan tersebut dari tahun ke tahun dapat menimbulkan perubahan kondisi lingkungan pesisir dan perairan Pulau Rote. Perubahan kondisi lingkungan dapat diidentifikasi melalui analisis data rona lingkungan. Data seismik memperlihatkan morfologi teras-teras pantai, dan intrusi diapir serpih di perairan Pulau Rote yang mengiindikasikan pulau ini mengalami proses pengangkatan sejak ribuan tahun yang lalu hingga sekarang. Sedimen permukaan dasar laut Pulau Rote terdiri atas pasir dan pasir lanauan mengandung mineral kuarsa, piroksen, mineral karbonatan dan cangkang moluska menunjukkan kondisi lingkungan sedimentasi rendah. Baku Mutu air dan sedimen permukaan dasar laut di perairan Pulau Rote dalam kondisi baik. Jenis pantainya berupa pantai berenergi tinggi, pantai erosi, pantai teluk, dan pantai kantong pasir masih dalam kondisi baik dan cukup bagus bagi wisata pantai dan laut. Hasil penelitian ini menunjukkan sebagain besar kondisi lingkungan perairan Pulau Rote masih dalam kondisi baik. Sebagian kecil ada perubahan sebagai dampak aktivitas manusia. 
 
 Kata kunci: rona lingkungan, geologi kelautan, intrusi, diapir serpih, Nusa Tenggara Timur, Pulau Rote
 
 
 Since the Rote Island government changed from the Kecamatan to Kabupaten Government, the development of coastal infrastructures and other sectors in the island increased. The development from time to time can lead to changes in coastal and marine environmental of the Rote Island. The environmental conditions can be identified through analysis environmental base data. The seismic data shows the morphology of coastal terraces, and intrusion of shale diapir in the Rote Island waters which indicate that this island has uplifted since thousands years ago until now. Surficial sediment of the Rote Island waters consists of sand and silty sand containing quartz and pyroxene minerals, and shells of mollusks which indicate low sedimentation environment. The standard quality of surface water and surficial sediment of the Rote Island is still in good condition. Coastal characteristics of this island consist of high-energy beaches, sand pocket beaches, bays, and erosion coasts which are still in good condition and suitable for tourism. This study shows that in general the environment of the Rote Island waters environment is normal conditions. A few of environmental changes is as an impact of human activities.
 
 Keywords: environment features, intrusion, shale diapir, Nusa Tenggara Timur, Rote island.

Zonation of Marine Geological Environment of Wangi-wangi Island Waters and Adjacent Area Wakatobi Districs Southeast Celebes Province

“…This study is a part of research that has been conducted in the waters between the Wangi-wangi and Kapota island, geographically between 123 o 25'00"E -123 o 35'00"E and 5 o 15'0.00"S-5 o 25'00"S ( Figure 3), by a research team from Marine Geological Institute in 2014 (Darlan, et. al., 2014).…”

“…al., 2014). The water depth from the shoreline to 0.5 miles seaward increase gradually from 0 to 20 m, and steeply deeper afterwards (Darlan, et al, 2014). Sedimentology and mineralogy were analysed from thirty four marine sediment samples, have been collected along the northeast coast of Kapota Island, and along the west coast of Wangi-wangi Island ( Figure 4).…”

“…Modification of structure developments in Sulawesi Island (Satyana, 2014) Figure 3. Bathymetry map of Wangi-wangi and Kapota (Darlan, et. al., 2014).…”

“…Figure 4. Distribution map of marine sediment texture of Wangi-wangi and Kapota (Darlan et al, 2014) the extremely temperature changes according to (Yulius et al, 2015).…”

Karakteristik Sedimen Pantai Dan Dasar Laut Di Teluk Papela, Kabupaten Rote, Provinsi NTT

“…Kondisi iklim di daerah ini tidak memungkinkan pengangkutan sedimen oleh sungai yang merupakan sungai intermitten. Penelitian terdahulu yang pernah dilakukan di sekitar Teluk Papela adalah penelitian mengenai rona lingkungan di sekitar Baa yang terletak di barat laut P. Rote yang menghadap ke Laut Sawu (Darlan dan Kamiludin, 2013). Penelitian mengenai tekstur sedimen dasar laut di Teluk Papela sudah dilakukan oleh Setiady drr.…”