The Low Flow Assessment of Padma River in Bangladesh
Low flow or Environmental Flow (EF) assessment is vital to ensure the river and ecosystem remain healthy. Both natural and human interventions might alter a river. Therefore, this study presents EF requirements of the famous Hilsa breeding center in the Padma River, Bangladesh, by applying the Hydr...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universitas Gadjah Mada
2021-12-01
|
| Series: | Journal of the Civil Engineering Forum |
| Subjects: | |
| Online Access: | https://journal.ugm.ac.id/v3/JCEF/article/view/3604 |
| _version_ | 1818669563979497472 |
|---|---|
| author | Md. Abu Sayed Aysha Akter |
| author_facet | Md. Abu Sayed Aysha Akter |
| author_sort | Md. Abu Sayed |
| collection | DOAJ |
| description |
Low flow or Environmental Flow (EF) assessment is vital to ensure the river and ecosystem remain healthy. Both natural and human interventions might alter a river. Therefore, this study presents EF requirements of the famous Hilsa breeding center in the Padma River, Bangladesh, by applying the Hydrologic Engineering Centers River Analysis System (HEC-RAS) for discharge and water surface levels simulations at different stations. The frequency analysis of 20 years of historical data, spanning 2000-2019, used the Log-Pearson Type III (LP-III) distribution method, while the one-dimensional unsteady flow simulation was performed for the last 10 years (i.e., 2012-2019). Subsequently, the HEC-RAS simulated water level values reasonably correlated with the field observations at four stations, namely Baruria Transit, Mawa, Tarpasha, Sureswar, with Coefficient of determination R2=0.86, 0.83, 0.92, and 0.74, alongside simulated minimum water surface levels of 1.57 m, 0.37 m, 0.30 m, and 0.27 m, respectively. Also, the Baruria Transit and Mawa had simulated flows that reasonably correlated with the field observations at R2=0.70 and 0.61, with a simulated minimum flow of 3849.51 m3/s and 3789.14 m3/s, respectively. The minimum flow according to the frequency analysis was 4017 m3/s, 3685 m3/s, 3449 m3/s, 3229 m3/s, and 3113 m3/s at Baruria Transit and 3304 m3/s, 2781 m3/s, 2438 m3/s, 2141 m3/s, 1992 m3/s at Mawa station in 5, 10, 20, 50 and 100 years return periods, respectively. This study overlooked to report the ongoing investigations into the water quality issues. Thus, this study is expected to guide the required EF quantity towards a healthy Hilsha fish habitat and surface water source for drinking purposes in this studied river. The stated method is also applicable to other similar rivers around the world.
|
| first_indexed | 2024-12-17T06:54:13Z |
| format | Article |
| id | doaj.art-8cfcb524fb87420da5b280c3ca0b69b1 |
| institution | Directory Open Access Journal |
| issn | 2581-1037 2549-5925 |
| language | English |
| last_indexed | 2024-12-17T06:54:13Z |
| publishDate | 2021-12-01 |
| publisher | Universitas Gadjah Mada |
| record_format | Article |
| series | Journal of the Civil Engineering Forum |
| spelling | doaj.art-8cfcb524fb87420da5b280c3ca0b69b12022-12-21T21:59:29ZengUniversitas Gadjah MadaJournal of the Civil Engineering Forum2581-10372549-59252021-12-018110.22146/jcef.3604The Low Flow Assessment of Padma River in BangladeshMd. Abu Sayed0Aysha Akter1Postgraduate student, Department of Civil Engineering, Chittagong University of Engineering & Technology (CUET), Chittagong 4349, BANGLADESH and Water Supply and Sewerage Engineer, Climate Resilient Infrastructure Mainstreaming Project, LGED.Chittagong University of Engineering & Technology (CUET), BANGLADESH Low flow or Environmental Flow (EF) assessment is vital to ensure the river and ecosystem remain healthy. Both natural and human interventions might alter a river. Therefore, this study presents EF requirements of the famous Hilsa breeding center in the Padma River, Bangladesh, by applying the Hydrologic Engineering Centers River Analysis System (HEC-RAS) for discharge and water surface levels simulations at different stations. The frequency analysis of 20 years of historical data, spanning 2000-2019, used the Log-Pearson Type III (LP-III) distribution method, while the one-dimensional unsteady flow simulation was performed for the last 10 years (i.e., 2012-2019). Subsequently, the HEC-RAS simulated water level values reasonably correlated with the field observations at four stations, namely Baruria Transit, Mawa, Tarpasha, Sureswar, with Coefficient of determination R2=0.86, 0.83, 0.92, and 0.74, alongside simulated minimum water surface levels of 1.57 m, 0.37 m, 0.30 m, and 0.27 m, respectively. Also, the Baruria Transit and Mawa had simulated flows that reasonably correlated with the field observations at R2=0.70 and 0.61, with a simulated minimum flow of 3849.51 m3/s and 3789.14 m3/s, respectively. The minimum flow according to the frequency analysis was 4017 m3/s, 3685 m3/s, 3449 m3/s, 3229 m3/s, and 3113 m3/s at Baruria Transit and 3304 m3/s, 2781 m3/s, 2438 m3/s, 2141 m3/s, 1992 m3/s at Mawa station in 5, 10, 20, 50 and 100 years return periods, respectively. This study overlooked to report the ongoing investigations into the water quality issues. Thus, this study is expected to guide the required EF quantity towards a healthy Hilsha fish habitat and surface water source for drinking purposes in this studied river. The stated method is also applicable to other similar rivers around the world. https://journal.ugm.ac.id/v3/JCEF/article/view/3604Environmental FlowHEC-RASLog-Pearson Type-IIIHilsha BreedingReturn Period |
| spellingShingle | Md. Abu Sayed Aysha Akter The Low Flow Assessment of Padma River in Bangladesh Journal of the Civil Engineering Forum Environmental Flow HEC-RAS Log-Pearson Type-III Hilsha Breeding Return Period |
| title | The Low Flow Assessment of Padma River in Bangladesh |
| title_full | The Low Flow Assessment of Padma River in Bangladesh |
| title_fullStr | The Low Flow Assessment of Padma River in Bangladesh |
| title_full_unstemmed | The Low Flow Assessment of Padma River in Bangladesh |
| title_short | The Low Flow Assessment of Padma River in Bangladesh |
| title_sort | low flow assessment of padma river in bangladesh |
| topic | Environmental Flow HEC-RAS Log-Pearson Type-III Hilsha Breeding Return Period |
| url | https://journal.ugm.ac.id/v3/JCEF/article/view/3604 |
| work_keys_str_mv | AT mdabusayed thelowflowassessmentofpadmariverinbangladesh AT ayshaakter thelowflowassessmentofpadmariverinbangladesh AT mdabusayed lowflowassessmentofpadmariverinbangladesh AT ayshaakter lowflowassessmentofpadmariverinbangladesh |