Taftiyan, Achmad Aunilla (2025) Analisis Distribusi Kualitas Air Pada Kawasan Perairan Mangrove Menggunakan Pemodelan Hidrodinamika (Studi Kasus: Mangrove Gunung Anyar, Surabaya). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Ekosistem mangrove di kawasan estuari Gunung Anyar, Surabaya, memiliki peran ekologis penting sebagai penyangga pesisir dan penyerap karbon. Namun, keberadaannya terancam oleh penurunan kualitas air akibat limpasan polutan dari aktivitas domestik, industri, dan budidaya. Penelitian ini bertujuan untuk menganalisis distribusi spasial dan temporal kualitas air, mengidentifikasi pengaruh faktor hidrodinamika terhadap distribusi tersebut, serta mengevaluasi status kualitas air untuk mendukung pelestarian ekosistem mangrove. Metode yang digunakan adalah pemodelan numerik dua dimensi berbasis MIKE21. Simulasi dilakukan selama satu tahun dengan input data berupa batimetri, pasang surut, debit sungai, arah dan kecepatan angin, serta data kualitas air dari hasil survei dan laboratorium. Enam parameter kualitas air yang dikaji meliputi Dissolved Oxygen (DO), Fosfat (PO₄), Nitrat (NO₃), Total Suspended Solid (TSS), Salinitas, dan Suhu. Hasil pemodelan menunjukkan bahwa distribusi kualitas air bersifat dinamis dan sangat dipengaruhi oleh kondisi hidrodinamika. Rentang konsentrasi tahunan di lokasi muara mencapai 8,04 mg/L untuk DO, 2,1 mg/L untuk fosfat, 0,54 mg/L untuk nitrat, 6,54 °C untuk suhu, 8,36 PSU untuk salinitas, dan 0,15 kg/m³ untuk TSS. Korelasi antara total kedalaman air (total water depth) terhadap enam parameter kualitas air menghasilkan nilai rata-rata r = 0,37, menandakan pengaruh hidrodinamika yang signifikan. Korelasi tertinggi terjadi antara parameter nutrien (NO₃, PO₄) dan DO. Evaluasi status kualitas air menunjukkan bahwa hanya 3–4 dari 6 parameter yang memenuhi baku mutu berdasarkan Kepmen LH No. 51 Tahun 2004. Secara spasial, wilayah sepanjang badan sungai merupakan zona dengan kualitas air paling rendah dan perlu menjadi fokus pengelolaan lingkungan. Hasil penelitian ini sejalan dengan tujuan pembangunan berkelanjutan (SDGs) poin 14 dan 15 yang menekankan pentingnya pelestarian ekosistem laut dan daratan.
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The mangrove ecosystem in the estuarine area of Gunung Anyar, Surabaya, plays a crucial ecological role as a coastal buffer and carbon sink. However, its sustainability is threatened by declining water quality due to pollutant runoff from domestic, industrial, and aquaculture activities. This study aims to analyze the spatial and temporal distribution of water quality, identify the influence of hydrodynamic factors on its distribution, and evaluate the water quality status to support mangrove conservation. The methodology employed is twodimensional numerical modeling using the MIKE21 software suite. The simulation was conducted over a one-year period, incorporating input data such as bathymetry, tidal elevation, river discharge, wind speed and direction, as well as field and laboratory water quality data. Six
water quality parameters were examined: Dissolved Oxygen (DO), Phosphate (PO₄), Nitrate
(NO₃), Total Suspended Solids (TSS), Salinity, and Temperature. The modeling results indicate that water quality distribution is dynamic and highly influenced by hydrodynamic conditions. Annual concentration ranges at the estuary mouth reached 8.04 mg/L for DO, 2.1 mg/L for
phosphate, 0.54 mg/L for nitrate, 6.54 °C for temperature, 8.36 PSU for salinity, and 0.15 kg/m³ for TSS. Correlation analysis between total water depth and the six water quality parameters yielded an average r-value of 0.37, indicating a moderate influence of hydrodynamics. The strongest correlation was observed between nutrient parameters (NO₃, PO₄) and DO. Evaluation of the water quality status revealed that only 3 to 4 out of the 6 parameters met the quality
standards set by Ministerial Decree No. 51 of 2004. Spatially, areas along the river channels exhibited the lowest water quality and should be prioritized for environmental management. This study aligns with Sustainable Development Goals (SDGs) 14 and 15, which emphasize
the importance of conserving marine and terrestrial ecosystems.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | stuari, Mangrove, Pemodelan Hidrodinamika, Kualitas Air, MIKE21, SDGs, Estuary, Mangrove, Hydrodynamic Modeling, Water Quality, MIKE21, SDGs |
| Subjects: | H Social Sciences > HT Communities. Classes. Races > HT390+ Coastal zone management Q Science > QA Mathematics > QA911 Fluid dynamics. Hydrodynamics Q Science > QB Astronomy > QB415.2 Tides. T Technology > TD Environmental technology. Sanitary engineering > TD890 Global Environmental Monitoring System |
| Divisions: | Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | Achmad Aunilla Taftiyan |
| Date Deposited: | 25 Jul 2025 04:50 |
| Last Modified: | 25 Jul 2025 04:50 |
| URI: | http://repository.its.ac.id/id/eprint/121672 |
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