And let some mountains collapse headlong into the depths of a valley and dam up the swollen waters of its river But soon breached, the river bursts the dam and gushes out in high waves. Let the biggest of these strike and demolish the cities and country residences of that valley. And let the disintegration of the high buildings of the said cities raise much dust which will rise up like smoke or...

After a major flood with a peak discharge of 177 m3/s in the city of Martigny (Valais, Switzerland) by the alpine river Drance in October 2000, the local authorities are strengthening efforts for the protection of the urban area. The Drance has an annual average discharge of 10 m3/s and the most important floods occur in the late summer. Two lateral torrents potentially supply the Drance with d...

Diyala Governorate was exposed recently to high flood waves discharged from Hemrin Dam River when the dam reached its full capacity. The recorded discharge capacity of reduced just 750m3/s. This exposes cities and villages along risk discharging waves, which may reach 3000 m3/s. It is important manage, suggest, design escapes away River. escape branches Lake towards Ashweicha Marsh. One dimensi...

Small dams for hydropower have caused widespread alteration of Central American rivers, yet much of recent development has gone undocumented by scientists and conservationists. We examined the ecological effects of a small hydropower plant (Doña Julia Hydroelectric Center) on two low-order streams (the Puerto Viejo River and Quebradon stream) draining a mountainous area of Costa Rica. Operation...

in this study a machine learning algorithm was applied in order to develop a predictive model for the changes in phytoplankton biomass (chlorophyll a) in the lower nakdong river, south korea. we used a “hybrid evolutionary algorithm (hea)” which generated model consists of three functions ‘if-thenelse’ on the basis of a 15-year, weekly monitored ecological database. we used the average ...

this study has been executed aiming at identifying, classifying and investigating the environmental effects of lorestan’s roodbaar dam during its exploitation phase through utilizing mike11 software and linmap technique. lorestan’s roodbaar dam is located in lorestan province, 100 kilometers to the south of alugoodarz town on roodbaar river (from branches of eastern dez river), within the area ...

Riverine dams alter both the physical environment and water chemistry, thus affecting species assemblages within these environments. In the United States, dam construction is on the decline and there is a growing trend for dam removal. The Choctawhatchee, Pea, and Yellow Rivers Watershed Management Authority had initiated the permitting process for placing a reservoir dam on the Little Choctawh...

Run-of-the-river hydroelectric dams cause changes in seasonal inundation of the floodplains, and this may cause displacement of semi-aquatic vertebrates present before dam construction. This study evaluated the movement of crocodilians before and after the filling of the Santo Antônio hydroelectric reservoir on the Madeira River in the Brazilian Amazon, which occurred in November 2011. We radio...

This is a study of the scientific component of an effort to restore an urban river by removing a low-head dam. The Secor Dam is owned by a local government entity near Toledo, Ohio. The proposed removal of the last structure impeding flow on the Ottawa River has broad appeal, but the owner is concerned about liability issues, particularly potential changes to the flood regime, the presence of c...