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|Other Titles:||Assessment Indices of Dune Degradation for Sustainable Management: An Example from Yilan Coast, Taiwan|
Department of Geography, NTNU
Coastal dune is a dynamic and biodiversified, yet vulnerable, environment. These dunes act as a buffer to extreme waves and winds, as well as, a freshwater aquifer to provide habitats to plants and animals. In addition, the dune landscapes also have high aesthetic values that can attract tourists. However, many coastal dune systems in the world are suffering degradation either from the natural environmental pressures or from the interference of human activities. In our case study from the northeastern coast of Taiwan, some different types of dune degradation are identified. Many beaches are narrowed; erosion dune scarps are formed; and the recession of dune scarp continues. Dunes have been removed artificially for the construction of new roads or industrial parks. Low dune slacks are reclaimed as fish or duck breeding ponds. The continuous and increased intensity of human use has resulted in extensive and irreparable damages on the dunes ecologically and morphologically. Thus, there is an urgent need to develop an assessment index of dune degradation for the sustainable management. The discussion for developing the assessment indices for practical management that can evaluate the environmental quality is centered on three basic services provided by the coastal dune: coastal defense, ecology and aesthetic landscape. The intention is to provide environment managers a tool that can collect the information of dune conditions quickly and to be helpful for decision making.
|Appears in Collections:||地理研究|
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