土木工程學系Shih, Shang-ShuShang-ShuShihLee, Hong-YuanHong-YuanLee2008-03-072018-07-092008-03-072018-07-092005-10http://ntur.lib.ntu.edu.tw//handle/246246/64175The aerial photographs from 1986 to 2002 were used to analyze and predicted the temporal and spatial variations of the vegetation changes in Guandu Nature Reserve. The results revealed that the marsh habitat, dominated by Cyperus malaccensis Lam. and Phragmites communis (L.) Trin, has changed into a swamp habitat, dominated by Kandelia candel (L.). The coverage area of Kandelia candel (L.) has increased from 7.2 hectares in 1986 to 23.8 hectares in 2002. It causes significant impacts upon the ecosystem and flood control operations. GIS-based technique has been used to determine the vegetation changes in this area. TABS-2, a horizontal two dimensional sediment transport simulation model, can be utilized to evaluate the sediment transport characteristics of this estuarine wetland. The Shannon’s diversity index decreased from 0.98 in 1986 to 0.77 in 2002. Additionally, the Shannon’s evenness index also decrease form 0.77 in 1986 to 0.5 in 2002. We have concluded that the habitat diversity became lower and lower and will be unbenefited to water birds. Significant sediment deposition occurs due to the extensive root network of Kandelia candel (L.) Druce. The average deposition is about 33 mm during a 200 years return period flood event. Removal of Kandelia candel (L.) Druce is able to reduce the sediment deposition rate. When the removal ratio reaches 20%, the reduction in sediment deposition is about 5 mm. It is also found that mangrove remove will improve the ecological restoration of Uca (Thalassuca) Formosensis Rathbun which is an endemic species of the fiddler crab in Taiwan.983751 bytesapplication/pdfen-USintertidal wetland, vegetation change, sediment transport simulation, GIS-based technique, landscape type index, ecological restoration[SDGs]SDG15journal articlehttp://ntur.lib.ntu.edu.tw/bitstream/246246/64175/1/Investigations and Prediction of Vegetation changes and Corresponding Sediment transport Characteristics in Guandu Nature Reserve.pdf