Water quality analysis and evaluation of management strategies and policies in Laguna Lake, Philippines

Authors

• Nsh Jett D. G. Reyes, De La Salle University, Manila
• Franz Kevin F. Geronimo, De La Salle University, Manila
• Marla M. Redillas, De La Salle University, Manila
• Jungsun Hong, Kongju National University
• Lee-Hyung Kim, Kongju National University

College

Gokongwei College of Engineering

Department/Unit

Civil Engineering

Document Type

Article

Source Title

Journal of Wetlands Research

Volume

20

Issue

1

First Page

43

Last Page

53

Publication Date

2-2018

Abstract

Laguna Lake is the largest inland freshwater body in the Philippines. It primarily serves as a site for aquaculture, hydropower, transportation, and water supply industries. Due to Laguna Lake’s diverse functionalities, competition among water users became prominent. Water quality began to deteriorate due to various pollutant contributions in this process, thereby affecting the soundness of the aquatic ecosystem. This study was conducted to evaluate the current water quality management policy from the viewpoint of ecological environment through the evaluation of the water quality of Laguna Lake. Concentrations of water pollutants such as ammonia (NH3), biochemical oxygen demand (BOD), chloride (Cl-

), pH, and total suspended solids (TSS) exceeded the water quality standards of the Philippines’ Department of Environment and Natural Resources (DENR). The water quality of the lake was also affected by the pollutant load due to agriculture and urban stormwater runoff in the watershed. The salinity and contaminated water from Pasig River also affected the water quality of Laguna Lake. Long-term water quality analysis showed that the water quality of Laguna Lake is also influenced by rainfall-related seasonal variations. The results of the water quality analysis of Laguna Lake indicated that the environmental management techniques of the Philippines should be changed from the conventional water management into an integrated watershed management scheme in the future. It is therefore necessary to study and introduce advanced

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Recommended Citation

Reyes, N. D., Geronimo, F. F., Redillas, M. M., Hong, J., & Kim, L. (2018). Water quality analysis and evaluation of management strategies and policies in Laguna Lake, Philippines. Journal of Wetlands Research, 20 (1), 43-53. Retrieved from https://animorepository.dlsu.edu.ph/faculty_research/15112

Disciplines

Civil and Environmental Engineering

Keywords

Water quality—Philippines—Laguna de Bay; Water quality—Philippines—Laguna de Bay—Measurement; Water quality management—Philippines—Laguna de Bay

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