Silaban, Marchellinno Binsar and Prof. Dr. Ir. Mohammad Mahmudi,, MS and Ekwan Nofa Wiratno,, S.Si, M.Si (2023) Analisis Kualitas Air dengan Makrozoobentos di Sungai Brantas Wilayah Kecamatan Klojen, Malang, Jawa Timur. Sarjana thesis, Universitas Brawijaya.
Abstract
Sungai Brantas merupakan Sungai yang cukup populer di kalangan masyarakat Jawa, khususnya masyarakat Jawa Timur. Sungai Brantas menjadi sungai terpanjang kedua di pulau Jawa setelah Sungai Bengawan Solo. Aliran Daerah Aliran Sungai (DAS) Brantas dimulai dari Kota Batu, Malang, Blitar, Tulungagung, Kediri, Jombang, dan Mojokerto. Pencemaran kualitas air di Sungai Brantas Kecamatan Klojen, Kota Malang disebabkan oleh berbagai macam sumber, seperti kegiatan industri, pertanian, peternakan, aktivitas rumah tangga, dan lain sebagainya. adanya peningkatan aktivitas industri dan domestik maka akan berdampak juga pada kondisi kualitas air di Sungai Brantas Kota Malang yang menyebabkan peningkatan konsentrasi nilai Biological Oxygen Demand (BOD) ke dalam badan Sungai. Status pencemaran di Sungai Brantas Kecamatan Klojen Kota Malang menggunakan makrozoobentos sebagai bioindikator, dapat dilakukan dengan observasi lapangan secara langsung. Penelitian dilaksanakan pada bulan April 2023 hingga Mei 2023 di Sungai Brantas Wilayah Kecamatan Klojen Kota Malang. Penelitian meliputi pengukuran nir dan kualitas air serta pengambilan sampel makrozoobentos. Teknik pengambilan sampel makrozoobentos menggunakan alat Ekman Grab berukuran 30 x 30 cm. Penggunaan alat sampling Ekman grab didasari karena kondisi substrat serta kedalaman sungai. Pengambilan sampel dilakukan pada 3 stasiun yang masing-masing stasiun memiliki kondisi lapang dan karakteristik ekologi yang berbeda. Parameter lingkungan yang diukur antara lain suhu, arus, substrat, pH, DO, BOD, COD, dan TOM. Penilaian kualitas pencemaran berdasarkan kualitas air menggunakan makrozoobentos ialah menggunakan indeks Biological Monitoring Working Party (BMWP) & Average Score Per Taxon (ASPT). Penggunaan BMWP-ASPT ialah untuk menentukan status kesehatan sungai berdasarkan makroinvertebrata yang ditemukan. Perhitungan menggunakan indeks BMWP-ASPT adalah dengan mengklasifikasikan taksa yang ditemukan dan diberi skor sesuai dengan scoring Indeks BMWP-ASPT. Kepadatan Relatif dari makrozoobentos juga dilakukan untuk mengetahui kepadatan relatif spesies dari tiap stasiun Sungai Brantas Wilayah Klojen. Kondisi kualitas air di Sungai Brantas wilayah Kecamatan Klojen Kota Malang menunjukan angka yang cukup optimal. Beberapa parameter seperti COD dan TOM tergolong melewati batas dari kadar optimal yang ditetapkan. Makrozoobentos yang ditemukan di Sungai Brantas Wilayah Klojen adalah sebanyak 8 taksa, antara lain Elmidae, Chironomidae, Tipulidae, Caenidae, Baetidae, Thiaridae, Hydropsychidae, dan Oligochaeta. Hasil analisis berdasarkan indeks BMWP-ASPT menunjukan bahwa kondisi kualitas air berdasarkan organisme makrozoobentos di Sungai Brantas Wilayah Klojen Kota Malang Jawa Timur tergolong tercemar sedang hingga buruk.
English Abstract
The Brantas River is quite popular among Javanese people, especially the people of East Java. Brantas River is the second longest river in Java after Bengawan Solo River. The flow of the Brantas Watershed starts from Batu City, Malang, Blitar, Tulungagung, Kediri, Jombang, and Mojokerto. Water quality pollution in the Brantas River, Klojen District, Malang City is caused by various sources, such as industrial activities, agriculture, livestock, household activities, and so on. an increase in industrial and domestic activities will also have an impact on the condition of water quality in the Brantas River Malang City which causes an increase in the concentration of Biological Oxygen Demand (BOD) values into the river body. The status of pollution in the Brantas River, Klojen District, Malang City using macrozoobenthos as a bioindicator, can be done by direct field observation. The research was conducted from April 2023 to May 2023 in the Brantas River, Klojen District, Malang City. The research included measurement of water quality and macrozoobenthos sampling. Macrozoobenthos sampling technique using Ekman Grab tool measuring 30 x 30 cm. The use of Ekman grab sampling tool is based on the condition of the substrate and the depth of the river. Sampling was conducted at 3 stations, each station has different field conditions and ecological characteristics. Environmental parameters measured include temperature, current, substrate, pH, DO, BOD, COD, and TOM. Assessment of pollution quality based on water quality using macrozoobenthos is using the Biological Monitoring Working Party (BMWP) index and Average Score Per Taxon (ASPT). The use of BMWP-ASPT is to determine the health status of the river based on the macroinvertebrates found. The calculation using the BMWP-ASPT index is to classify the taxa found and scored according to the scoring of the BMWP-ASPT Index. Relative density of macrozoobenthos is also done to determine the relative density of species from each station of the Brantas River Klojen Region. The condition of water quality in the Brantas River in the Klojen Subdistrict of Malang City shows a fairly optimal number. Some parameters such as COD and TOM are classified as exceeding the limits of the optimal levels set. Macrozoobenthos found in the Brantas River Klojen Region is as many as 8 taxa, including Elmidae, Chironomidae, Tipulidae, Caenidae, Baetidae, Thiaridae, Hydropsychidae, and Oligochaeta. The results of the analysis based on the BMWP-ASPT index show that the condition of water quality based on macrozoobenthos organisms in the Brantas River Klojen Malang City, East Java is classified as moderately to poorly polluted.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0523080516 |
| Subjects: | 300 Social sciences > 333 Economics of land and energy > 333.9 Other natural resources > 333.95 Biological resources > 333.956 Fishes |
| Divisions: | Fakultas Perikanan dan Ilmu Kelautan > Manajemen Sumberdaya Perairan |
| Depositing User: | soegeng sugeng |
| Date Deposited: | 15 Dec 2023 04:01 |
| Last Modified: | 15 Dec 2023 04:01 |
| URI: | http://repository.ub.ac.id/id/eprint/205267 |
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