Maharani, Diza Alifya Hadinah and Dr. Eng. Ir. Riyanto Haribowo, ST., MT., IPM and Emma Yuliani, ST., MT., Ph.D. (2023) Analisis Kualitas Air Menggunakan Metode Indeks Pencemaran, CCME-WQI, Dan NSF-WQI di Sungai Surabaya, Jawa Timur. Sarjana thesis, Universitas Brawijaya.
Abstract
Sungai Surabaya merupakan pecahan dari Sungai Brantas bagian hilir yang mengalir dari Kabupaten Mojokerto ke Timur laut lalu melewati Kabupaten Sidoarjo, Kabupaten Gresik dan Kota Surabaya. Sungai Surabaya memasok 96% dari kebutuhan air baku PDAM kota Surabaya. Namun, kualitas Sungai Surabaya dinyatakan telah mengalami pencemaran, sehingga tidak layak dijadikan air baku PDAM. Selain itu, yang menyebabkan sungai tersebut dinyatakan telah mengalami pencemaran yaitu akibat adanya aktivitas masyarakat di sekitar Sungai Surabaya. Penelitian ini dilakukan sejak bulan Januari sampai Desember 2022 Penelitian ini melakukan identifikasi atas pengaruh limbah pertanian, limbah domestik dan limbah industri terhadap kualitas air di Sungai Srabaya. Selain itu, penelitian ini juga akan membandingkan hasil kualitas air dari metode indeks pencemaran, NSF-WQI dan CCME-WQI untuk mengetahui metode terbaik dan relevan dalam pengujian kualitas air di Sungai Surabaya. Pengambilan data dilakukan melalui penyusuran di Sungai Surabaya pada Titik Hilir (Jembatan Karang Pilang). Data-data tersebut berisi data dengan parameter yang dikumpulkan, yaitu parameter fisika yang meliputi:Suhu, Kekeruhan, TSS (Total Suspended Solid). Parameter kimia yang meliputi: pH (Power of Hydrogen), BOD (Biochemical Oxygen Demand), DO (Dissolved Oxygen), Fosfat (PO4), Nitrat (NO3). Dan parameter biologi yang meliputi: Total Coliform. Hasil identifikasi dalam penelitian ini menunjukkan bahwa dalam metode Indeks Pencemaran sejak tahun 2016-2021, status mutu air pada titik hulu memiliki kualitas air sebanyak 100% Cemar Ringan. Titik tengah 66,67% Cemar Ringan dan 33,33% Cemar Sedang. Tititk hilir dan muara 83,33% Cemar Ringan dan 16,67% Cemar Sedang. Untuk metode CCME-WQI diperoleh status mutu air yaitu pada titik hulu 66,67% Kurang, dan 16,67% Cukup dan 16,67% Sangat Buruk. Titik tengah 33,33% Buruk, dan 16,67% Cukup Baik dan 16,67% Kurang. Titik hilir 83,33% Buruk dan 16,67% Kurang. Dan titik muara 50% Buruk, 33% Kurang, dan 16,67% Cukup. Terakhir, pada metode NSF-WQI diperoleh status mutu air yaitu pada titik hulu, tengah, hilir, dan muara adalah 100% buruk. Berdasarkan pemetaan sebaran kualitas air menggunakan software ArcMap dengan metode IDW, kualitas air di Sungai Surabaya dari titik hulu hingga muara ditemukan sangat fluktuatif. Kemudian, hasil analisis dari ketiga metode yang digunakan dalam penelitian ini menunjukkan bahwa metode NSF-WQI lebih sesuai untuk manajemen pengendalian pencemaran air karena metode ini memiliki hasil paling buruk, sehingga dapat digunakan sebagai pertimbangan untuk manajemen pengendalian pencemaran air.
English Abstract
The Surabaya River is a fraction of the downstream Brantas River which flows from Mojokerto Regency to the Northeast and then passes through Sidoarjo Regency, Gresik Regency and Surabaya City. Surabaya River supplies 96% of the raw water needs of PDAM Surabaya. However, the quality of the Surabaya River is said to have been polluted, so it is unfit to be used as PDAM raw water. In addition, what caused the river to be declared polluted was the result of community activities around the Surabaya River. This research was conducted from January to December 2022 This study identified the effect of agricultural waste, domestic waste and industrial waste on water quality in the Srabaya River. In addition, this study will also compare the results of water quality from the pollution index method, NSF-WQI and CCME-WQI to determine the best and most relevant method for testing water quality in the Surabaya River. Data collection was carried out by crossing the Surabaya River at the Downstream Point (Karang Pilang Bridge). These data contain data with parameters collected, namely physical parameters which include: Temperature, Turbidity, TSS (Total Suspended Solid). Chemical parameters which include: pH (Power of Hydrogen), BOD (Biochemical Oxygen Demand), DO (Dissolved Oxygen), Phosphate (PO4), Nitrate (NO3). And biological parameters which include: Total Coliform. The identification results in this study show that in the Pollution Index method from 2016-2021, the water quality status at the upstream point has a water quality of 100% Lightly Polluted. The midpoint is 66.67% Lightly Polluted and 33.33% Moderately Polluted. Downstream and estuary points are 83.33% Light Polluted and 16.67% Moderate Polluted. For the CCME-WQI method, the status of water quality is obtained, namely at the upstream point 66.67% Less, and 16.67% Fair and 16.67% Very Bad. The midpoint is 33.33% Bad, and 16.67% Fair and 16.67% Poor. The downstream point is 83.33% Bad and 16.67% Less. And the estuary point is 50% Bad, 33% Less, and 16.67% Enough. Finally, the NSF-WQI method obtained the status of water quality, namely at the upstream, middle, downstream, and estuary points, which were 100% bad. Based on mapping the distribution of water quality usingsoftware ArcMap with the IDW method, water quality in the Surabaya River from the upstream point to the estuary was found to be very volatile. Then, the results of the analysis of the three methods used in this study indicate that the NSF-WQI method is more suitable for water pollution control management because this method has the worst results, so it can be used as a consideration for water pollution control management.
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0523070108 |
| Subjects: | 600 Technology (Applied sciences) > 627 Hydraulic engineering > 627.5 Reclamations, Irrigation, related topics > 627.52 Irrigation |
| Divisions: | Fakultas Teknik > Teknik Pengairan |
| Depositing User: | Endang Susworini |
| Date Deposited: | 25 Jul 2023 01:57 |
| Last Modified: | 25 Jul 2023 01:57 |
| URI: | http://repository.ub.ac.id/id/eprint/202086 |
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