| Summary: | 碩士 === 國立臺灣大學 === 生物環境系統工程學研究所 === 100 === In order to improve the ecological environment of agricultural irrigation channels, series of various cases of agricultural channel ecological engineering have been promoted in Taiwan since 2002. In order to find out which material is more suitable for inhabitation of aquatic animals, comparison between eco-performances of irrigation channels with different materials is necessary. Because hydrological and water quality conditions affect inhabitation of aquatic animals, comparison must be executed at channels with similar hydrological and water quality conditions. This study investigates four irrigation channels. Include two channels are made up of mortar pebbles and two channels are made up of concrete. According to the results of factor analysis and forage ratio, between two channels with similar hydrological and water quality conditions, Acrossocheilus paradoxus and Candidia barbatus prefer inhabit the mortar pebbles channel rather than the concrete channel significantly (p-value <0.05). The results show the mortar pebbles material is more suitable for inhabitation of Acrossocheilus paradoxus and Candidia barbatus.
Porous eco-concrete is a new type ecological material in agricultural channel ecological engineering. Because the techniques of this material have not been popularized, eco-performance of the irrigation channel system that part of the channel change in porous eco-concrete channel is necessary. This study evaluates the eco-performance of an eco-concrete channel system. Part of the system is made up of porous eco-concrete. In this investigation, there were 7 species 2,694 individuals of aquatic animals inhabited in the system between 45 to 306 days after the completion of the construction. The animals include Fejervarya limnocharis and it’s tadpole, Duttaphrynus melanostictus, Neocaridina denticulata, Macrobrachium asperulum, Melanoides tuberculatus, and Corbicula fluminea. Part of the irrigation channel system change in porous eco-concrete channel can help the eco-performance of the whole irrigation channel system.
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