KAJIAN KARAKTERISTIK ALIRAN SUNGAI CIASEM (1,81 KM) DESA SITUSARI KABUPATEN SUBANG DENGAN MENGGUNAKAN PROGRAM HEC-RAS

RAMDHAN, MUHAMMAD (2020) KAJIAN KARAKTERISTIK ALIRAN SUNGAI CIASEM (1,81 KM) DESA SITUSARI KABUPATEN SUBANG DENGAN MENGGUNAKAN PROGRAM HEC-RAS. S1-Sarjana thesis, Universitas Mercu Buana Jakarta.

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Abstract

Kondisi alur sungai terbentuk secara alamiah sesuai dengan kondisi alam yang dilalui oleh aliran air tersebut. Kondisi alam berupa faktor geologi, morfologi, vegetasi, iklim, curah hujan menjadi penyebab adanya perbedaan bentuk sungai yang menyebabakan adanya perbedaan karakteristik sungai. Dalam penelitian kali ini dilakukan analisis karakteristik aliran Sungai Ciasem Situsari Subang dengan menggunakan program HECRAS. Dari hasil analisis HEC-RAS, pada periode ulang 25 tahun dan 50 tahun hampir disepanjang sungai dari hulu ke hilir didapat nilai Froude (FR) < 1. Nilai ini menunjukkan bahwa jenis aliran yang terjadi adalah aliran subkritis. Selain itu, dari hasil analisis HECRAS dan analisis perhitungan didapat sepanjang saluran sungai dari STA 21 – STA 1 nilai Reynolds (Re)<2100,ini menujukkan bahwa aliran yang terjadi yaitu aliran laminer, dimana aliran mengalir dengan kecepatan yang rendah. Dengan jenis aliran tersebut pada periode ulang 25 dan 50 tahun terjadi limpasan air banjir di beberapa titik, yang mengakibatkan kurang optimalnya pemanfaatan sungai Ciasem, Situsari Subang. Kata kunci: Aliran, Laminer, HEC-RAS, Subkritis, Banjir, Froude, Reynold The condition of the river channel is formed naturally in accoradance with the natural conditions traversed by the water flow. Natural conditions like geological, morphological, vegetation, climate, rainfall caused different form of river that make different characteristics of the river. In this research, object that used for analysis of flow characteristic used HEC-RAS program is Ciasem River that located at Situsari Subang. From the result of HEC-RAS analysis, in the 25 year period and 50 year period, almost of cross section obtained value of Froude (Fr) < 1 along the river from upstream to downstream. The value of Froude (Fr) indicated that type of flow along the river is subcritical. Moreover, from the results of HEC-RAS analysis and calculation analysis obtained Reynold (Re) Value along Ciasem River from STA 21 until STA 1 < 2100. From this value can be identified that type of flow is Laminer with low flow velocity. With this type of flow during 25 year period and 50 year period occurance of flood water discharge at some point, which make unoptimally utilization of Ciasem River at Situsari Subang. Keywords: Flow, Laminer, HEC-RAS, Subcritical, Flood, Froude, Reynold

Item Type: Thesis (S1-Sarjana)
Call Number: ST/11/19/157
NIM: 41117110004
Uncontrolled Keywords: Flow, Laminer, HEC-RAS, Subcritical, Flood, Froude, Reynold
Subjects: 000 Computer Science, Information and General Works/Ilmu Komputer, Informasi, dan Karya Umum > 000. Computer Science, Information and General Works/Ilmu Komputer, Informasi, dan Karya Umum > 006 Special Computer Methods/Metode Komputer Tertentu > 006.7 Multimedia Systems/Sistem-sistem Multimedia > 006.78 Programz/Program
300 Social Science/Ilmu-ilmu Sosial > 380 Commerce, Communications, Transportation (Perdagangan, Komunikasi, Transportasi) > 386 Inland Waterway/Transportasi Pengangkutan di Daerah Pedalaman > 386.3 River Transportation/Transportasi Sungai
Divisions: Fakultas Teknik > Teknik Sipil
Depositing User: Dede Muksin Lubis
Date Deposited: 10 Feb 2020 06:05
Last Modified: 10 Feb 2020 06:05
URI: http://repository.mercubuana.ac.id/id/eprint/54150

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