quantification of the habitat available for fish species named rainbow trout (oncorhynchusmykiss) were evaluated in lees ferry, colorado river using water depth, water temperature, sediment transport,flow velocity in 2004 as environmental index. for the flow velocity and temperature distribution calculationsin the river, the navier-stokes equation and energy conservation equations with finite v...

Abstract Dam control changes the hydraulic environment and hydrological rhythm of rivers; to explore causes fish habitat loss influence river regulation in such rivers, downstream curving reaches Shaying River were cut off. Grass, silver, bighead carp selected as research targets, impact waterway effect gravel mounds on target studied using numerical simulation. The results show that original c...

Species distribution models (SDMs) are extensively used to project habitat suitability of species in stream ecological studies. Owing to complex sources of uncertainty, such models may yield projections with varying degrees of uncertainty. To better understand projected spatial distributions and the variability between habitat suitability projections, this study uses five SDMs that are based on...

Water regulation and flood control of rivers are changing due to streamflow depletion following industrialization urbanization, significantly impacting aquatic ecosystems. Therefore, restoration the ecological environment is necessary maintain a healthy river ecosystem. For ecosystem restoration, amount discharge from dams must be controlled appropriate environmental flow calculated according f...

An appropriate environmental flow (AEF) is one of the necessary conditions for fish spawning. The operation cascade reservoirs in lower reaches Jinsha River has changed discharge process downstream, which turn directly affected spawning habitat fishes. Determining how to quantitatively evaluate impact different outflows from Xiangjiaba Reservoir on four major Chinese carp species downstream are...

Weirs are often constructed on mountainous rivers because of their low construction costs and ability to provide irrigation facilitate landscaping, yet there is little research how fish habitat quality in responds weir distribution. This study categorized the distribution characteristics weirs typical reaches according sinuosity calculated corresponding suitability index (HSI) weighted usable a...

Approximately 85% of the water consumed in Chile is destined to agricultural irrigation and is managed by the users themselves. This study analyzed the price that irrigation water users pay to their Water User Associations (WUAs) to which they belong and the relationship of this price to the professional level and performance of the WUAs. The study included 24 WUAs: 10 River Administration Boar...

River–lake interaction is important for maintaining biodiversity, yet it vulnerable to hydrological alteration. The connectivity of the channel connecting Poyang Lake and Yangtze River not only ensures regular migration fish but also makes a feeding fattening ground them. Unfortunately, human activities have dramatically changed hydrodynamic conditions Lake, which experiencing severe drought du...

For the past two decades, China’s urbanization has attracted increasing attention from scholars around the world. Numerous insightful studies have attempted to determine the socioeconomic causes of the rapid urban growth in Chinese cities. However, most of these studies regarded each city as a single entity, with few considering inter-city relationships. The present study uses a gravity-based m...

The adaptability of fish to their habitats is closely related river hydraulics. While navigation channel projects aim improve the conditions by adjusting hydrodynamic force local sections, impacts these on hydraulic indicators four major Chinese carp species (FMCCs) remain unclear. Taking Daijiazhou reach in middle reaches Yangtze River as a case study, mathematical model for spawning suitabili...