Streamflow in the Himalayan rivers is generated from rainfall, snow and ice. The distribution of runoff produced from these sources is such that the streamflow may be observed in these rivers throughout the year, i.e. they are perennial in nature. Snow and glacier melt runoff contributes substantially to the annual flows of these rivers and its estimation is required for the planning, developme...

In October 2001, ,0.2 mol of SF6 was injected into the upper Hudson River, a modified natural channel with multiple dams, at Ft. Edward, N.Y. The tracer was monitored for 7 days as it moved ,50 km downriver. The longitudinal evolution of the tracer distribution was used to estimate one-dimensional advection s9.0±0.2 km d−1d and dispersion s17.3±4.0 m2 s−1d along the river axis. Comparison of th...

[1] On the basis of estimates of sediment accumulation in reservoirs, the impact of 50,000 dams on sediment supply and intertidal wetland response in the Yangtze River catchment is examined. The total storage capacity of reservoirs is 200 10 m, or 22% of the Yangtze annual runoff. The sediment accumulation rate in reservoirs has increased from 0 in 1950 to >850 10 t/yr in 2003. Although sedimen...

Dam removal is an increasingly popular restoration tool, but our understanding of ecological responses to dam removal over time is still in the early stages. We quantified seasonal benthic macroinvertebrate density, taxonomic composition, and functional traits for three years after lowhead dam removal in three reaches of the Olentangy River (Ohio, USA): two upstream of former dam (one restored,...

Dam overtopping failure and the resulting floods are hazardous events that highly impact inundated areas less predictable. The simulation of dam breach flood wave propagation is necessary for assessing hazards to provide precautions. In present study, a two-dimensional HEC-RAS model was used simulate from hypothetical Al-Udhaim on River, Iraq, dam-break along 100 km downstream site scenario. ma...

Pulses of fine sediment in gravel-bedded rivers can cause extensive fine sediment infiltration (FSI) into void spaces in coarse bed material, potentially altering river morphodynamics and aquatic ecosystems. Previous work suggests a conceptual model of FSI whereby FSI occurs to a limited depth as a function of the relative grain size of bed sediment compared with infiltrating sediment and is in...

In recent years, the intensified influences of global climate change and human activities have increased frequency large-scale debris flow disasters. As a result, main river channels often become blocked, thus forming disaster chain rivers dammed by followed outburst flooding. order to quickly easily reveal dynamic process dam breach, quantitatively predict flood hazard, this study takes Zhouqu...

#" !$" Snowmelt dominated streamflow of the Western Himalayan rivers is an important water !%" resource during the dry pre-monsoon months to meet the irrigation and hydropower needs !&" in northern India. This study is one of the first to look at the seasonal prediction of melt!'" dominated total inflow into the Bhakra Dam in northern India, based on statistical !(" relationships with meteorolo...