| Summary: | 碩士 === 南華大學 === 環境與藝術研究所 === 94 === Because Bajhang River is short with small drainage basins and is steep with uneven rainfall distrubition through out the year, the difference between dry and wet seasons is very noticable. The economic development, residential dwellings, roads, theme parks and other construction are continuously getting developed in the upper stream catchment area and this has caused the rainfall to direct runoff and not able to infiltrate the ground. This has affected the recharge of the ground water and caused the shortage of water volume in dry seasons and this influenced the river habitat greatly.
This research is hoping to analyse and summarise the differences and likely changes of the living creatures such as fishes, river insects, algages and amphibians, birds and plants in the habitat between Chuko bridge and Chinhui bridge along Bajhang river by compared with living creatures in the close by rivers using the current space and habitat environment and based on the existing hydrological construction,geological and hydrological conditions and using the previous research on the type, quantity, habits and changes over the years.
This research will divide the area of river under this research into four parts according to the differences in river bed, slope, section, and current environment and analyse and evaluate the damage and erosion of habitat and river bed and the effects it brings to living creatures in the river based on the maximum daily and instant discharge for the last 30 years. This research will attempt to come up with solutions to improve the situations. This research will also attempt to come up with the Fish''s ecological flow of base and high flow of ecology that are suitable for the hydrological environment in Taiwan based on the relevant research on fishes conducted domestically and internationally.
And the flow of day of the whole year every five years over the past 30 years to analyse and evaluate whether the daily discharge volume of Bajhang is providing a suitable living habitat for fishes and other creatures in the river. It will attempt to find out the cause of this daily discharge volume and come up with suitable solutions. The research will also look at the yearly sediment amount in the last 30 years for the area of the river under this research to analyse the erosion situation in upper stream and river bed and evaluate the effects sediment bring to the changes in the living habitat.
The research will investigate the Construct things and block the river weir and firm bed worker in water conservancy project in the particular part of the river under research by using hydrological analysis, Similar to the river conservancy worker and construct things to investigate in present situation analysis , riverbed bottom quality investigation and the whole country and further analyse the effects The river conservancy worker constructs things brings to the living creatures in the habitat to come up with suggestions for improvements to re-establish the multi-dimensional living environment in Bajhang river and restore its nature.
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