Fadilah, Ulfa Musia (2016) Model Penurunan Kualitas Air Pada Daerah Aliran Sungai Brantas Hulu. Sarjana thesis, Universitas Brawijaya.
Abstract
Sungai merupakan ekosistem yang sangat penting bagi manusia sebagai tempat menyediakan air untuk berbagai kegiatan seperti pertanian, industri maupun domestik. Salah satu sungai yang banyak dimanfaatkan yaitu Sungai Brantas. Pemanfaatan air sungai yang tidak sesuai fungsinya dapat menyebabkan penurunan kualitas air. Selama ini prediksi kualitas air dilakukan dengan cara pengambilan sampel pada aliran sungai dan diuji di laboratorium. Selanjutnya hasil uji tersebut dibandingkan dengan standar baku mutu yang telah ditetapkan oleh pemerintah. Namun hal tersebut mengalami banyak kendala, diantaranya yaitu membutuhkan waktu yang relatif lama dan biaya yang tidak murah. Perlu adanya suatu cara untuk mengetahui kualitas air dengan cara yang lebih cepat dan tidak membutuhkan banyak biaya. Penelitian ini dilakukan dengan metode deskriptif kuantitatif. Tujuan penelitian ini yaitu mengetahui kualitas air di bagian hulu DAS Brantas yang terletak di Kota Batu, Menentukan persamaan regresi perubahan kualitas air di hulu DAS Brantas, memprediksi kualitas air di bagian hulu DAS Brantas berdasarkan persamaan yang telah didapatkan. Penelitian dilakukan untuk memprediksi kualitas air sungai pada hulu Sungai Brantas yang terletak di Kota Malang dengan membandingkan persamaan regresi linier dan regresi polinomial. Hasil persamaan akan dibandingkan dengan hasil uji sampel sehingga dapat diketahui perbandingan penurunan kualitas air di daerah aliran Sungai Brantas hulu atas. viii Selanjutnya model persamaan yang didapatkan dibandingkan dengan kualitas air pada hulu daerah aliran sungai Brantas bagian bawah Parameter yang digunakan pada penelitian ini meliputi BOD, COD, TSS, Fosfat, dan DO. Penentuan kualitas air berdasarkan kelima parameter tersebut dilakukan dengan pengujian di laboratorium. Hasil pengolahan data menunjukkan R square yang lebih besar pada regresi polinomial daripada regresi linier. Berdasarkan hasil pengamatan, trend model kualitas air di Brantas hulu mengikuti persamaan polinomial. Bentuk persamaan regresi polinomial yaitu Y = β0 + β1X + β2X2 + ε. Persamaan BOD yang didapatkan yaitu Y=8.909+1.101x-0.036x2, COD yaitu Y=19.608+2.012x-0.041x2, TSS yaitu Y=6.391+2.984x-0.037x2, DO yaitu Y=9.466-0.439x+0.009x2, dan fosfat yaitu Y=0.163+0.041x-0.001x2.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FTP/2016/161/051604343 |
| Subjects: | 300 Social sciences > 338 Production > 338.1 Agriculture |
| Divisions: | Fakultas Teknologi Pertanian > Keteknikan Pertanian |
| Depositing User: | Indah Nurul Afifah |
| Date Deposited: | 02 Jun 2016 09:37 |
| Last Modified: | 15 Nov 2021 03:50 |
| URI: | http://repository.ub.ac.id/id/eprint/150693 |
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