Status : Verified
| Personal Name | Cuenco, Brianne N. |
|---|---|
| Resource Title | Assessment of the Nutrient Loading and of the Carrying Capacity of Laguna de Bay as a Class C Surface Water Body Using Numerical Modelling |
| Date Issued | 03 January 2020 |
| Abstract | Laguna de Bay is a multi-purpose lake adjacent to Metro Manila and has been classified as a Class C water resource in accordance with the DENR Administrative Order No. 2016-008. In this study, the nutrient loading and carrying capacity, along with its Carlson’s Trophic State Index (CTSI), were assessed using a two-dimensional numerical model implemented with the Hydrodynamic and ECO Lab Modules of DHI’s MIKE 21. The hydrodynamic model was calibrated with respect to water levels observed at the Angono Station (mean error of 0.1858 m). The water quality component on the other hand (ECO Lab) which simulated temperature, salinity, BOD, DO, Chl-a, NH3, NO3, and PO4 among others, ended with average mean errors of -0.167 mg/L for NO3-N and -0.0596 mg/L for PO4 when compared to LLDA’s lake monitoring stations. Based on simulation results, nitrates and phosphates spread in the lake coming mostly from the west bay (San Pedro to Metro Manila), and the central bay (Angono and Baras), demonstrating that much of the lake’s pollution originate from land-based sources (anthropogenic). Through various scenarios, it was found that the lake fails for various water quality parameters even with its tributary rivers being able to satisfy the upper limits of the Class C surface water standards. PO4, NO3-N, and BOD on the other hand need to be set at 0.35 mg/L, 6.3 mg/L, and 3 mg/L, respectively for all draining tributaries to achieve the water quality requirements for Class C waters any time of the year. Also, based on the Carlson’s Trophic State Index (CTSI), Laguna de Bay can be classified as a hypereutrophic lake with values increasing during the wet season. |
| Degree Course | Master of Science in Environmental Engineering |
| Language | English |
| Keyword | Laguna Lake; Laguna de Bay; Nutrient Loading; Carrying Capacity; Class C Surface Water; Numerical Modelling |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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Category : F - Regular work, i.e., it has no patentable invention or creation, the author does not wish for personal publication, there is no confidential information.
Access Permission : Open Access