Towards High Resolution (~1 Km) Global Surface Water Quality Modelling: A Test Case for Citarum Basin, West Java, Indonesia
Summary
As the global population grows, the demand for safe water access increases. At the same
time, increased wastewater disposal from urban activities and reduced river dilution capacity
contribute to the deterioration of water quality, further leading to water scarcity. However,
challenges associated with consecutive and integrated water quality monitoring create a
significant barrier to effective water quality management.
To address these challenges, the dynamical surface water quality model (DynQual) has been
developed to simulate water temperature, as well as the concentration of Total Dissolved
Solids (TDS), Biological Oxygen Demand (BOD), and Fecal Coliform (FC). This water quality
model operates at a daily time step with a spatial resolution of 5 x 5 arcmin, equivalent to 10
km at the equator.
This study ran the DynQual model at 1 km resolution to evaluate its feasibility and potential at
finer scales. The evaluation was done by comparing the performance of the 1 km resolution
model to models with different resolutions. A downscaling and upscaling technique was
applied to match the designated resolution. The outputs of each model were validated to the
local observations data by using error statistics. The model performance was assessed by
using bias and correlation, in which the most accurate model is the one with the smallest bias
and strongest correlation.
The error statistics indicate that the correlation differs across resolution and parameters, while
the 1 km resolution model exhibits the most significant bias, particularly in simulating BOD,
FC, and TDS. However, this study also suggests that the model is able to capture across
different seasons. Here, the study explores the challenges encountered when running the
DynQual model at different resolutions. Further adjustment and calibration in parameterization
may be required to improve the model’s accuracy at finer resolution.
Collections
Related items
Showing items related by title, author, creator and subject.
-
Between Resolution and Reality: A critical assessment of the impact of Resolution 1325 in the aftermath of the Sri Lankan Civil War between 2009 and 2015
Halkes, R. (2021)United Nations Security Council Resolution 1325 (UNSCR 1325) is seen as a landmark resolution in reaffirming the importance of women’s participation in all efforts taken to prevent war and to build peace. In recent years, ... -
Deep Learning-Based Contrast Transformation of High Resolution 3D Gradient Echo Images Trained Using Low Resolution 2D Turbo Spin Echo Images
Pollitt, Ryan (2022)Acquiring multiple clinically relevant MR image contrasts from a single scan is an emerging trend in MR imaging to reduce the total scan time of an exam. A deep learning-based approach that takes this idea one step further ... -
High resolution paleoclimatic study linking the Aegean Sea to Eastern Mediterranean Holocene records
Filippidi, A. (2013)Sapropel formation is thought to be strongly related to deep-water formation. The latter is known to take place in Adriatic and Aegean basins. In this study, therefore, high resolution geochemical analyses have been performed ...