—Migratory barriers, habitat loss, entrainment in irrigation canals, and overexploitation, especially at times of aggregation, have been suggested to explain the failure of Yellowstone River saugers Sander canadensis to return to historical abundances after a late-1980s decline that was attributed to drought. These factors are thought to affect saugers throughout their range and migratory large...

We assessed spatial and temporal patterns of genetic diversity to evaluate effects of river fragmentation on remnant populations of the federally endangered Rio Grande silvery minnow (Hybognathus amarus). Analysis of microsatellite and mitochondrial (mt) DNA detected little spatial genetic structure over the current geographic range, consistent with high gene flow despite fragmentation by dams....

Abstract The Qingshuigou channel is the longest in modern Yellow River Delta since its diversion 1976. To explore morphological evolution of on response to changing water and sediment regimes, we applied two-dimensional hydro-sediment-morphodynamic coupling model simulate characteristics bed erosion deposition estuary different regimes. results demonstrate that regarding seasonal difference yea...

Eastern Zhejiang is an important area for the economic development of Province. However, water resources in eastern are relatively poor. After completion north line East Water Diversion Project, catchment and drainage connecting rivers all counties cities have been dredged, flood control capacity has improved, river channels along also comprehensively renovated, network environment Shangyu City...

Coastal Louisiana is currently experiencing high rates of wetland loss and large-scale ecosystem restoration being implemented. One the largest most novel projects a controlled sediment diversion, proposed to rebuild sustain wetlands by diverting sediment- nutrient-rich water from Mississippi River. However, impact this diversion on nutrient budget receiving basin largely unknown. A quality mod...

平原河网多存在河道流动性不强，河道生态流速难以保障的问题，以典型平原河网地区——宁波市海曙区为例，开展野外原型同步监测，以河道分流比、换水率及槽蓄量为研究对象，系统分析引调水工程对河网水动力的调控效果.结果表明：平原河网水动力改善效果与引排水口分布、引水流量密切相关，为保证河网区水体交换良好，引排水口的连线应尽可能贯通整个区域；平原河网换水率在空间分布上具有很强的异质性（4种调水方案下河道换水率极差，最大为190%，最小为75%），引调水工程能够改善分流能力大的支汊的水动力特征，对分流能力小的支汊及断头河的水动力状况帮助不大；河网换水率提高、槽蓄量变化率减小是区域水动力改善的必要条件，海曙区较小的槽蓄量变化率为0.2%左右.本研究分析了河网区的河道输水能力以及换水率，对优化河网概化密度以减小模拟偏差有参考意义，为进一步探究平原河网水动力改善促进水环境质量提升提供基础，利于特殊水动力特...