SAFIRA IRDANIA, NIM. 112017132 (2022) PERHITUNGAN CURAH HUJAN RERATA PADA TIGA KECAMATAN DI WILAYAH KABUPATEN OGAN KOMERING ILIR. Skripsi thesis, Univeritas muhammadiyah palembang.

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Abstract

Rainfall data is very important for engineering planning, especially for water structures such as irrigation, dams, urban drainage, ports, docks, and others. Therefore, rainfall data in an area is recorded continuously to calculate the planning that will be carried out. Recording of rainfall data carried out in a watershed is carried out at several points of rainfall recording stations to determine whether the distribution of rain that falls on a watershed is evenly distributed or not. Ogan Komering Ilir Regency is one of the regencies in South Sumatra Province which has an area of ±19,023.47 km2 which lies at 104°20' and 106°00' east longitude and 2°30' - 4°15' south latitude. Administratively, Ogan Komering Ilir Regency has 18 sub-districts, 13 sub-districts and 314 villages. The purpose of this study is that the researcher wants to know the average rainfall in the Ogan Komering Ilir district and the method whose difference values are close together. From the calculation of the average rainfall in Ogan Komering Ilir Regency with three methods, first using the algebraic average method in 2016 it was 59.25mm, in 2017 it was 50.889mm, in 2018 it was 53,583, in 2019 it was 47.269mm and in 2020 it is 43,583mm. for the second calculation, using the Thiessen polygon method, in 2016 it was 62.281mm, in 2017 it was 48.326mm, in 2018 it was 49.297mm, in 2019 it was 50.296mm and in 2020 it was 40.838mm. And for the third calculation, using the isohyet method, in 2016 it was 59.5mm, in 2017 it was 55,151mm, in 2018 it was 54.08mm, in 2019 it was 48.129 and in 2020 it was 43,443mm. The percentage difference in average rainfall in Ogan Komering Ilir Regency by means of an algebraic average in 2016-2017 obtained a difference value of 16.430%, in 2017-2018 the difference value was 5.028%, in 2018-2019 the difference value was 13.358% , in 2019-2020 obtained a difference of 8.457%. for the second calculation, using the Thiessen polygon method in 2016-2017 the difference is 28.877%, in 2017-2018 the difference is 1.970%, in 2018-2019 the difference is 1.986%, in 2019-2020 the difference is 23.160 %, and for the third calculation, using the isohyet method in 2016-2017 the difference value is 7.886%, in 2017-2018 the difference is 1.980%, in 2018-2019 the difference is 12.35%, and in 2019- 2020 obtained a difference of 10.787%. The adjacent difference values in 2016-2020 are the algebraic method and the ishoyet method. Keywords: Rainfall data, Algebraic mean method, Thiessen polygon method and Isohyet method.

Item Type:	Thesis (Skripsi)
Additional Information:	Pembimbing : 1. Ir. H. Jonizar, M.T 2. Ir. H. Matsyuri Ayat, M.Si
Uncontrolled Keywords:	Rainfall data, Algebraic mean method, Thiessen polygon method and Isohyet method.
Subjects:	Teknik Sipil > Teknik Hidraulis
Divisions:	Fakultas Teknik > Teknik Sipil (S1)
Depositing User:	Mahasiswa Fakultas Teknik
Date Deposited:	29 Mar 2022 05:25
Last Modified:	29 Mar 2022 05:25
URI:	http://repository.um-palembang.ac.id/id/eprint/19917

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