4篇
您的检索式：作者名="Koen BLANCKAERT"
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| 1 | Optimizing the operation of the Qingshitan Reservoir in the Lijiang River for multiple human interests and quasi-natural flow maintenance显示文摘For reservoir operation, maintaining a quasi-natural flow regime can benefit river ecosystems, but may sacrifice human interests. This study took the Qingshitan Reservoir in the Lijiang River as a case, and developed an optimization model to explore a trade-off solution between social-economic interests and nature flow maintenance on a monthly base. The objective function considered irrigation, cruise navigation and water supply aspects. An index of flow alteration degree was proposed to measure the difference between the regulated discharge and the natural flow. The index was then used as an additional constraint in the model besides the conventional constraints on reservoir safety. During model solving, different criteria were applied to the index, representing various degrees of alteration of the natural flow regime in the river. Through the model, a relationship between social-economic interests and flow alteration degree was established. Finally, a trade-off solution of the reservoir operation was defined that led to a favorable social-economic benefit at an acceptable alteration of the natural flow. | Qiuwen Chen Duan Chen Ruiguang Han Ruonan Li Jinfeng Ma Koen Blanckaert | 2012 | Journal of Environmental Sciences2012，24，11： | 2 |
| 2 | Reduction of bend scour with an air-bubble screen-morphology and flow patterns显示文摘The interplay between streamwise flow,curvature-induced secondary flow,sediment transport and bed morphology leads to the formation of a typical bar-pool bed morphology in open-channel bends.The associated scour at the outer bank and deposition at the inner bank may endanger the outer bank's stability or reduce the navigable width of the channel.Previous preliminary laboratory experiments in a sharply curved flume with a fixed horizontal bed have shown that a bubble screen located near the outer bank can generate an additional secondary flow located between the outer bank and the curvature-induced secondary flow and with a sense of rotation opposite to the latter.This bubble-induced secondary flow redistributes velocities and bed shear stresses.The reported study investigates the implications of a bubble screen on the flow and the morphology in configurations with mobile bed.Velocity measurements show that the bubble-induced secondary flow shifts the curvature-induced secondary flow in inwards direction and reduces its strength.The bubble screen considerably reduces morphological gradients.Maximum bend scour is reduced by about 50%and occurs further away from the outer bank where it does not endanger the bank stability anymore.The location of maximum scour coincides with the junction of the curvature-induced and bubble-induced secondary flows.At this same location,the maximum streamwise velocities and maximum vertical velocities impinging on the bed also occur,which indicates their importance with respect to the formation of bend scour.The bubble screen also substantially reduced deposition at the inner bank.These preliminary experiments show the potential of a bubble screen to influence and modify the bed morphology. | Violaine DUGU Koen BLANCKAERT Qiuwen CHEN Anton J.SCHLEISS | 2013 | International Journal of Sediment Research2013，28，1： | 2 |
| 3 | Ecologically-friendly operation scheme for the Jinping cascaded reservoirs in the Yalongjiang River, China显示文摘在河里保存关键生态系统性质的 Ecologically 友好的水库操作过程目的,当最小化社会经济的兴趣的牺牲时。集中于 Jinping 的这研究作为案例研究串联了水库。一个优化模型被开发在除去的自然隧道节,和年度力量生产探索在目标鱼种(Schizothorax chongi ) 的生态的流动要求(EFR ) 之间的平衡。为隧道的 EFR 被 Tennant 方法和一个鱼产地模型分别地决定。优化模型被使用一个适应真实代码的基因算法解决。相应于生态的流动系列的几种操作情形用优化模型被评估。通过比较,一个最佳的运作的计划,在除去的隧道把相对低的力量生产损失与比较喜欢的生态的流动政体相结合,为串联水库被建议。在推荐计划下面,进在旱季的 Dahewan 河活动范围的分泌物从 36 ~ 50 m ^啜 3 ^/s。这将在要保存的隧道启用至少 50% 目标鱼产地,以 2.5% 仅仅年度力量生产损失的成本。学习证明 EFR 的使用是以一个生态地友好的方法的水库操作的优化的一条有效途径。,为另外的重要的鱼种类和生态系统类似的建模工作,由结果的领域确认补充了,被需要以便固定影响的河生态系统的长期的保存[出版摘要] | Duan CHEN Qiuwen CHEN Ruonan LI Koen BLANCKAERT Desuo CAI | 2014 | Frontiers of Earth Science2014，8，2： | 2 |
| 4 | Momentum transport in sharp open-channel bends 显示文摘 | KOEN BLANCKAERT GRAF WALTER H | 2004 | Journal of Hydraulic Engineering2004，130，3： | 1 |
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