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首页> 外文会议>International Yellow River Forum on Keeping Healthy Life of the River vol.4; 20051021-24; Zhengzhou(CN) >Research on Fish Habitat Diversity with Applications of Numerical Model Analysis
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Research on Fish Habitat Diversity with Applications of Numerical Model Analysis

机译：鱼类生境多样性的数值模型分析研究

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摘要

Two fish species, i.e. Gobiidae, Cyprinidate, are selected as the indicator species to investigate the hydraulic diversity and different fish habitats types with and without spur dikes in the tidal estuary. A quasi - two - dimensional model, NETSTARS, and a horizontal two - dimensional model, TABS - 2, were employed to simulate the hydraulic and sediment transport characteristics of the Lan - yang Estuary in the presence and absence of the constructed spur dikes. The results in the normal discharge events reveal that the fish habitat area will increase with the less number and the shorter length of spur dikes. Installing spur dikes, nevertheless, will increase the hydraulic diversity and therefore create various flow conditions suited for different aquatics. The well - known Shannon diversity index was employed in this study to combine and calculate the different habitat type as an index value. It was therefore concluded that optimum habitat diversity take place while the number of spur dikes was 6 ～ 10 and 3 ～ 5 of PQI and Fr. No. method, respectively. The spur dike is a hydraulic structure intended to protect the river bank by diverting the existing flow direction. River width is thus influenced by spur dikes. Proper utilization of spur dikes can also create near-natural flow conditions in both rivers and lakes. Moreover, we prove that suitable number of spur dikes can also create diverse aquatic habitat in regular discharge period.
机译：选择两种鱼类，即鲤科的戈壁科（Gubiidae）作为指示物种，以研究潮汐河口是否有堤防的水力多样性和不同的鱼类生境类型。使用准二维模型NETSTARS和水平二维模型TABS-2来模拟存在和不存在丁坝时兰阳河口的水力和泥沙输送特征。正常排放事件的结果表明，鱼塘的栖息地面积将随着丁坝的数量减少和长度的缩短而增加。但是，安装丁坝会增加水力的多样性，因此会产生适合不同水产的各种流量条件。本研究采用著名的香农多样性指数来组合和计算不同的生境类型作为指标值。因此得出的结论是，在PQI和Fr的丁坝数量为6〜10和3〜5的情况下，发生了最佳的生境多样性。编号方法。丁坝是一种液压结构，旨在通过转移现有的水流方向来保护河岸。河流宽度因此受到丁坝的影响。丁坝的正确利用也会在河流和湖泊中创造近乎自然的流动条件。此外，我们证明了适当数量的丁坝也可以在定期排放期间创造各种水生生境。

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