Ramadhan, Rafif Asadel Styaki (2025) Hydrodynamic Modelling As A Study Fir Brantas River Watershed Recovery Effort Using Mike21 (Study Case: Kali Surabaya And Kali Mas). Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5016211087-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5016211087-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (11MB) | Request a copy |
Abstract
Air memegang peranan penting dalam menopang kehidupan dan mendukung aktivitas manusia, namun meningkatnya industrialisasi dan perluasan pemukiman terus mengancam
kualitasnya, terutama di sistem sungai. Sungai Surabaya dan Kali Mas, sebagai bagian dari aliran utama di Daerah Aliran Sungai Brantas, memiliki fungsi ekologi dan sosial ekonomi yang vital bagi Jawa Timur. Akan tetapi, pembangunan yang pesat telah menyebabkan penurunan kualitas air yang signifikan. Studi ini menggunakan model hidrodinamika MIKE21 untuk mensimulasikan karakteristik aliran di Sungai Surabaya dan Kali Mas serta mengintegrasikan MIKE ECOLab sebagai sarana pemodelan kualitas air untuk menilai distribusi BOD, DO, NH4, dan NO3 di berbagai musim. Model ini divalidasi menggunakan metode perbandingan bias kesalahan untuk memverifikasi kemiripan isinya dengan situasi kehidupan nyata. Hasil penelitian menunjukkan bahwa kualitas air cenderung menurun di bagian hilir, terutama pada
musim kemarau, dengan kadar BOD mencapai 6,3 mg/L, konsentrasi NH4 melebihi 0,65 mg/L di bagian hilir, dan DO turun hingga 2,2 mg/L di bagian hulu, sehingga menempatkan daerah tersebut pada kelas 3 hingga kelas 4 menurut standar Indonesia PP No. 22/2021. Berdasarkan penelitian ini, langkah-langkah pemulihan yang diusulkan untuk setiap segmen sungai adalah sistem aerasi di daerah hulu, pengurangan beban limbah di zona tengah sungai, dan pembersihan berbasis komunitas masyarakat serta penyangga hijau perkotaan di daerah perkotaan di hilir sungai.
=========================================================================================================================================
Water plays a crucial role in sustaining life and supporting human activities, yet increasing industrialization and residential expansion continue to threaten its quality, especially in river systems. Kali Surabaya and Kali Mas, as part of the main streams in the Brantas River watershed, serve vital ecological and socioeconomic functions for East Java. However, rapid development has led to significant water quality degradation. This study uses the MIKE21
hydrodynamic model to simulate flow characteristics in the Kali Surabaya and Kali Mass and integrates with MIKE ECOLab for water quality modeling to assess the distribution of BOD, DO, NH4, and NO3 across seasons. The model is validated using the error bias comparison method to verify its content resemblance to real life situations. The results show that water quality tends to decline downstream, particularly during the dry season, with BOD levels reaching 6.3 mg/L, NH4 concentrations exceeding 0.65 mg/L in the downstream, and DO dropping to 2.2 mg/L in the upstream, hence placing those areas in class 3 to class 4 under Indonesian standards PP No. 22/2021. Based on these findings, targeted restoration measures are proposed for each river segment, including aeration systems in the upstream areas, waste
load reduction in midstream zones, and community-based cleanups and urban buffers in downstream urban areas.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Hydrodynamics modelling, water quality, river restoration |
| Subjects: | G Geography. Anthropology. Recreation > GC Oceanography |
| Divisions: | Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | Rafif Asadel Styaki Ramadhan |
| Date Deposited: | 22 Jul 2025 07:44 |
| Last Modified: | 22 Jul 2025 07:44 |
| URI: | http://repository.its.ac.id/id/eprint/120600 |
Available Versions of this Item
- Hydrodynamic Modelling As A Study Fir Brantas River Watershed Recovery Effort Using Mike21 (Study Case: Kali Surabaya And Kali Mas). (deposited 22 Jul 2025 07:44) [Currently Displayed]
Actions (login required)
 |
View Item |