固镇站为淮水北调工程输水沿线上的二级翻水站工程，站址设于浍河左侧固镇闸下刘园干沟涵以下约200m处的左岸堤后。该站工程等别为$等，主泵房安装4台1950HLQ13.2-12.8立式全调节混流泵，配备4台TL2200-28/3250立式同步电机。固镇站进...固镇站为淮水北调工程输水沿线上的二级翻水站工程，站址设于浍河左侧固镇闸下刘园干沟涵以下约200m处的左岸堤后。该站工程等别为$等，主泵房安装4台1950HLQ13.2-12.8立式全调节混流泵，配备4台TL2200-28/3250立式同步电机。固镇站进水流道为肘形结构，共4处，中间设有导流墩，流道断面由6.5m x 3.5m(宽4高）矩形渐变到直径2.1m圆形。该工程肘型进水流道结构复杂，断面变化大，属大体积异型混凝土结构，施工难度大，技术复杂，温控措施要求严格。肘形流道施工用模板有钢模及木模两种，该工程采用钢模，理由是:（1)成本低、制作精度高，成型的在尺寸有保证，表面光滑。展开更多
One technical fishway and two innovative nature-like fishways were installed at three dams on the Acushnet River in Acushnet, Massachusetts to facilitate migration of river herring and juvenile American eels （elvers...One technical fishway and two innovative nature-like fishways were installed at three dams on the Acushnet River in Acushnet, Massachusetts to facilitate migration of river herring and juvenile American eels （elvers）. Pre-construction and post-construction monitoring of river herring and elver populations used census counting and abundance estimation, respectively. Numbers of adult river herring returning to the upstream spawning grounds during the pre-construction phase were very low; elver counts declined during the pre-construction period and served as baseline levels to determine the effectiveness of the new fishways. Post-construction monitoring of river herring and elvers indicated an increasing trend of spawning adult river herring returning to the spawning grounds, with the total count in the fourth year of post-construction representing an increase of 1,140% over baseline, pre-construction conditions. Results also show increased elver recruitment into the river as well as increased proportions of elvers accessing habitat in the upper watershed that was mostly inaccessible prior to fishway installation. The new fishways at the three dams on the river have improved diadromous fish passage, thereby increasing the probability of restoring healthy populations of river herring and American eels to the Acushnet River system.展开更多
文摘固镇站为淮水北调工程输水沿线上的二级翻水站工程，站址设于浍河左侧固镇闸下刘园干沟涵以下约200m处的左岸堤后。该站工程等别为$等，主泵房安装4台1950HLQ13.2-12.8立式全调节混流泵，配备4台TL2200-28/3250立式同步电机。固镇站进水流道为肘形结构，共4处，中间设有导流墩，流道断面由6.5m x 3.5m(宽4高）矩形渐变到直径2.1m圆形。该工程肘型进水流道结构复杂，断面变化大，属大体积异型混凝土结构，施工难度大，技术复杂，温控措施要求严格。肘形流道施工用模板有钢模及木模两种，该工程采用钢模，理由是:（1)成本低、制作精度高，成型的在尺寸有保证，表面光滑。
文摘One technical fishway and two innovative nature-like fishways were installed at three dams on the Acushnet River in Acushnet, Massachusetts to facilitate migration of river herring and juvenile American eels （elvers）. Pre-construction and post-construction monitoring of river herring and elver populations used census counting and abundance estimation, respectively. Numbers of adult river herring returning to the upstream spawning grounds during the pre-construction phase were very low; elver counts declined during the pre-construction period and served as baseline levels to determine the effectiveness of the new fishways. Post-construction monitoring of river herring and elvers indicated an increasing trend of spawning adult river herring returning to the spawning grounds, with the total count in the fourth year of post-construction representing an increase of 1,140% over baseline, pre-construction conditions. Results also show increased elver recruitment into the river as well as increased proportions of elvers accessing habitat in the upper watershed that was mostly inaccessible prior to fishway installation. The new fishways at the three dams on the river have improved diadromous fish passage, thereby increasing the probability of restoring healthy populations of river herring and American eels to the Acushnet River system.
