Vulnerability Assessment of Climate Change on Sustainable Water Quality Management Systems
Date Issued
2006
Date
2006
Author(s)
Wang, Shih-Wei
DOI
zh-TW
Abstract
Sustainable development is to continue economic and social developments without degrading environmental quality and to keep cumulative impacts from exceeding the environmental carrying capacity. The sustainable environmental management strongly depends on the variation of environmental carrying capacity caused by the climate change. Stream assimilative capacity is an important environmental carrying capacity which is related with key factors, including water temperature, streamflow, and background pollution. Climate change may influence these factors and further affect the stream assimilative capacity.
Therefore, the main factors which affect the stream assimilative capacity and water quality are discussed in this study and used to assess the impact with different climate change scenarios. A conceptual and physical model, Generalized Watershed Loading Functions (GWLF), is applied to simulate the stream flow under different climate. Meanwhile, a water quality model (QUAL2E) is used to estimate the concentrations of BOD5 and DO with those variable stream flows. At last, the results of climate change impact assessment on stream assimilative capacity can be used to address the directions of future research on adaptation and also provide useful references to setup water quality standard and to manage assimilative capacity.
The Tochen River is taken as a case study in this study. The results indicate that the climate change increases the water temperature, decreases the streamflow in dry seasons, and leads to higher BOD5 concentration and lower stream assimilative capacity.
Subjects
永續發展
環境承載力
氣候變遷
全球暖化
Climate Change
Environmental Carrying Capacity
Global Warming
Sustainable Development
Type
thesis
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