a.
Summary of the Paper
The case study discusses the challenges of water pollution in the Santa Rosa Subwatershed of the Philippines, that is attributed to population growth, rapid urbanization,
and climate change. It introduces the Participatory Watershed Land-use Management
(PWLM) approach, which integrates participatory approaches and computer simulation
modeling to address these issues. The PWLM approach involves scenario analysis,
impact assessment, climate change adaptation and mitigation measure development, and
land-use plan improvement. The study utilized the Water Evaluation and Planning (WEAP)
model for hydrological simulation and scenario analysis to predict future water quality
based on population growth, climate change, and land use/land cover change.
The findings indicate a projected increase in population from 638,711 in 2013 to 1,283,202
by 2030, with potential impacts on water quality. Additionally, the study evaluated the
projected precipitation values for 2030 using different Global Climate Models (GCMs) and
Representative Concentration Pathway (RCP) scenarios to assess the potential impact of
climate change on water quality. It also highlights the importance of collaboration among
stakeholders and local governments to achieve sustainable water management.
The study identified potential adaptation measures, such as building wastewater treatment
plants (WWTPs) and sewerage connections, to mitigate destruction of water quality. It was
showed how these adaptation measures improves water quality, emphasizing the need
for multiple adaptation measures to achieve the desired water quality standards. The study
communicated these adaptation measures to local government officials for incorporation
into policy documents such as the Comprehensive Land Use Plan (CLUP) or Local
Climate Change Action Plan (LCCAP) for sustainable water resource management.
In conclusion, the study tells how important it is to use the PWLM approach for managing
water sustainably. It talks about the need to work together and think about the different
factors that affect water availability and safety such as population, land use, and climate
change. It provides valuable insights into the complex issue of water resource
management and emphasizes the significance of collaboration among key stakeholders
and local government units to achieve sustainable water management.
b. Points from the Paper
The study introduces the Participatory Watershed Land-use Management (PWLM)
approach, which integrates participatory approaches and computer simulation modeling.
The PWLM approach involves scenario analysis, impact assessment, development of
adaptation and mitigation measures, and improvement of land use planning. The study
utilized the Water Evaluation and Planning (WEAP) model for hydrological simulation and
scenario analysis to predict future water quality based on population growth, climate
change, and land use/land cover change. The findings indicate a projected increase in
population from 638,711 in 2013 to 1,283,202 by 2030, with potential impacts on water
quality. The study also evaluated the projected precipitation values for 2030 using different
Global Climate Models (GCMs) and Representative Concentration Pathway (RCP)
scenarios to assess the potential impact of climate change on water quality. It emphasizes
the importance of a transdisciplinary and integrated approach to address water resource
management challenges, highlighting the need for collaboration among stakeholders and
local governments to achieve sustainable water management. The study identified
potential adaptation measures, such as building wastewater treatment plants (WWTPs)
and increased sewerage connection rates, to mitigate water quality deterioration. The
simulation results demonstrated the potential impact of these adaptation measures on
improving water quality, emphasizing the need for multiple adaptation measures to
achieve the desired water quality standards.
c. Issues that are not Clear
The concepts and issues that may require further clarification include the specific details
of the adaptation measures proposed, the integration of climate change adaptation and
mitigation measures into local policies, and the potential impact of these measures on
water quality improvement. Additionally, the document mentions the use of the WEAP
model for scenario analysis and the need for transdisciplinary approaches, but further
details on the specific methodologies and data used for the hydrological simulation and
scenario analysis would enhance the understanding of the study. Furthermore, it
discusses the challenges of integrating multiple institutions dealing with land-use and
water quality issues within a watershed, highlighting the need for a transdisciplinary and
integrated approach. However, a more detailed explanation of the institutional challenges
and the proposed strategies for addressing these challenges would provide a clearer
understanding
of
the
findings.
d. Points for improvements/ Recommendations
 More sampling locations, along with increased frequency of monitoring and
monitoring of additional organic/inorganic water quality parameters, should be a
priority for further studies in the region. This can help to enhance the accuracy and
comprehensiveness of the water quality assessment.
 To further improve the effectiveness of the approach, it may be beneficial to
enhance stakeholder engagement and collaboration, ensuring that all relevant
parties are actively involved in decision-making processes and policy
implementation.
 The adaptation measures with scientific evidence of their impact should be
communicated to local government officials for incorporation into policy documents
such as the Comprehensive Land Use Plan (CLUP) or Local Climate Change
Action Plan (LCCAP) for sustainable water resource management. It is
recommended to ensure that the proposed adaptation measures are effectively
integrated into policy documents and implemented to address water quality
deterioration.
Prepared by: Marjorie B. Nabor
Bicol University
College of Engineering – East Campus
Civil Engineering Department
AY: 2023-2024
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Case Study Summary Report:
“Participatory Approach for More
Robust Water Resource
Management: Case Study of the
Santa Rosa Sub-Watershed of the
Philippines”
By: Pankaj Kumar, Brian Alan Johnson, Rajarshi Dasgupta, Ram
Avtar, Shamik Chakraborty, Masayuki Kawai and Damasa B.
Magcale-Macandog
Submitted by:
MARJORIE B. NABOR
BS Civil Engineering 3C
Submitted to:
ENGR. ANNA BILARO, MSCE