Indra Mutiara, Indra
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Pengamatan Pasang Surut Untuk Penentuan Datum Ketinggian di Pantai Desa Parak, Kecamatan Bonto Matene, Kabupaten Selayar, Provinsi Sulawesi Selatan

Jurnal Ilmu Kelautan SPERMONDE Vol 2, No 2 (2016)
Publisher : Jurnal Ilmu Kelautan SPERMONDE

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Abstract

Height of a point on land is determined by the position of sea level Average ( Mean Sea Level) . This paper investigates the Bench Mark local elevation measurements to Mean Sea Level tidal observations for 15 days at the village of Parak , District Bonto Matene, Selayar Regency, South Sulawesi Province . The results of the analysis of tidal by using the Admiralty Methode shows that  the value of Mean Sea Level in the study site is 119 cm, Spring Tide tidal current was 93.04 cm, and based on the value of Formzahl, the tides tipe on this beach is mixed tide prevailing semidiurnal. The measurement results indicate that the height of local Bench Mark to the Mean Sea Level is amounted to +1.927 m.

Tinjauan Elevasi Puncak Bangunan Seawall di Pantai Galesong Utara

INTEK: Jurnal Penelitian Vol 5, No 2 (2018): Oktober 2018
Publisher : Politeknik Negeri Ujung Pandang

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Abstract

This study aims to review the use of vertical datumand determine the elevation of seawall constructions based on thesea level design. The sea level design used as a vertical referenceis MSL and LWS. The elevation of the seawall construction fromthe two references above then compared to the elevation of theseawall construction listed in the as built drawing documentduring construction. The MSL value is obtained from the tidalanalysis by using Doodson method based on direct observationfor 39 hours, while the LWS value is obtained by taking intoaccount the position of the range of tide at Tide Station inMakassar. Seawall elevation is obtained by terrestrialmeasurements using the Total Station by measuring the height ofthe top position of the seawall construction against the sea leveldesign through the Bench Mark. The seawall top elevation datacollection is done every one meter along 274 meters. The resultsobtained from measuring seawall construction elevation are +2,251 meters if using reference to MSL and +2,911 meters if usinga reference to LWS, while the elevation in the as built drawingdocument is +4,000 meters unknown what vertical reference isused as a reference.

Perbandingan Laju Sedimentasi pada Embung Beroangin dengan Metode USLE dan Pengukuran Langsung

Jurnal Teknik Sipil : Rancang Bangun Vol 4, No 2 (2018): Oktober
Publisher : Universitas Muhammadiyah Sorong

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Abstract

Salah satu upaya dalam rangka pemenuhan kebutuhan air di Kabupaten Jeneponto Provinsi Sulawesi Selatan yang rentan terhadap kekeringan adalah dengan membangun Embung Beroangin pada tahun 2015 dengan kapasitas tampungan mati awal sebesar 1.307,49 m3, penurunan kapasitas tampungan mati embung dipengaruhi oleh erosi pada DAS yang selanjutnya terdeposit menjadi sedimen pada area tampungan embung. Penelitian ini dilakukan untuk memprediksi laju sedimentasi yang terjadi pada Embung Beroangin dengan metode analisis USLE menggunakan hasil analisa data sekunder meluputi: Luas DAS, curah hujan, jenis tanah, kelerengan dan penggunaan lahan. Analisa sedimentasi juga dilakukan melalui pengukuran langsung menggunakan echosounder dengan memetakan dan menghitung volume tampungan mati saat ini yang selanjutnya dibandingkan volume tampungan mati awal.  Laju sedimentasi yang diperoleh dengan metode USLE adalah sebesar 492.34 m3/tahun, sedangkan metode pengukuran langsung sebesar 435.38 m3/tahun