منابع مشابه
Modelling hyporheic processes for regulated rivers
Understanding the effects of major hydrogeological controls on hyporheic exchange and bank storage is essential for river water management, groundwater abstraction, restoration and ecosystem sustainability. Analytical models cannot adequately represent complex settings with, for example, transient boundary conditions, varying geom-5 etry of surface water–groundwater interface, unsaturated and o...
متن کاملA General Protocol for Restoration of Regulated Rivers
Large catchment basins may be viewed as ecosystems in which natural and cultural attributes interact. Contemporary river ecology emphasizes the four-dimensional nature of the river continuum and the propensity for riverine biodiversity and bioproduction to be largely controlled by habitat maintenance processes, such as cut and fill alluviation mediated by catchment water yield. Stream regulatio...
متن کاملFish Larvae and the Management of Regulated Rivers
Alterations to the natural hydrologic regime in regulated rivers can disrupt cues that initiate the maturation and spawning of riverine fish, or they can change the conditions which are suitable for the recruitment of larvae into juvenile populations. Observations of fish larvae have the potential to provide insights into the effects of flow regulation, showing whether it has had a greater impa...
متن کاملDownstream Migration of Salmon Smolts in Regulated Rivers: Factors Affecting Survival and Behaviour
Atlantic salmon is one of the most widely known migratory fish species whose populations have declined because of hydropower installations. Attempts have been made to preserve salmon stocks in regulated rivers by building fishways for adult fish migrating upstream, but downstream migration of salmon smolts has been almost totally ignored. Instead, captive breeding programmes and extensive stock...
متن کاملConserving iteroparous fish stocks in regulated rivers: the need for a broader perspective!
Hydroelectric dams and weirs often represent barriers for a wide range of migratory fish species and may cause population fragmentation (Jungwirth 1998; Lucas & Baras 2001; Heggenes & Roed 2006). In general, the migratory system of diadromous fishes requires both upand downstream migrations during the life cycle. Anadromous and potamodromous fish, such as Atlantic salmon, Salmo salar L., brown ...
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ژورنال
عنوان ژورنال: Environmental Conservation
سال: 1986
ISSN: 0376-8929,1469-4387
DOI: 10.1017/s0376892900036857