نتایج جستجو برای: flood mitigation dams

تعداد نتایج: 62330  

2012
G. Romanescu O. Bounegru

During the last 20 years, Romanian territory witnessed a recurrence of high-risk hydrologic phenomena. From this point of view, the floods and droughts are particularly noteworthy. Most of the rivers registered historic record levels, while droughts appear even in the mountainous hydrographic networks. Despite the fact that the frequency of rainfall increased during the same time-span, droughts...

Journal: :Journal of Contemporary Water Research & Education 2009

Journal: :Geomatics, Natural Hazards and Risk 2021

Wood is an important component of flash floods and debris flows in forested mountainous areas. To better understand the characteristics large wood (LW) movement its destructive effects on check dams, bridges, buildings, we conducted field investigations theoretical calculations flood process Keze gully Jiuzhaigou National Park (China). Based calculation method, magnitude amplification ratio pea...

ژورنال: علوم آب و خاک 1997
موسوی, سیدفرهاد, جلالیان, احمد, صمدی بروجنی, حسین , محمدزاده, احمد ,

One of the most vital problems in the storage and utilization of surface waters for drinking, flood control, hydropower, and agricultural purposes is that of sedimentation in reservoirs and subsequent decline of dam lifetime. The useful lifetime of a dam is defined as the time necessary for approximately 80% of the volume of its initial capacity to be filled by sediments washed in by water. It ...

2006
Robin J. McKillop John J. Clague

Existing methods of evaluating the hazard posed by moraine-dammed lakes are unsystematic, subjective, and depend on the expertise and biases of the geoscientist. In this paper, we provide a framework for making objective preliminary assessments of outburst flood hazard in southwestern British Columbia. Our procedure relies on remote sensing methods and requires only limited knowledge of glacial...

2016
Nasser Najibi Naresh Devineni Mengqian Lu

A comprehensive framework is developed to assess the flood types, their spatiotemporal characteristics and causes based on the rainfall statistics, antecedent flow conditions, and atmospheric teleconnections. The Missouri River Basin (MRB) is used as a case study for the application of the framework. Floods are defined using the multivariate characteristics of annual peak, volume, duration, and...

موسوی, سیدفرهاد, جلالیان, احمد, صمدی بروجنی, حسین , محمدزاده, احمد ,

One of the most vital problems in the storage and utilization of surface waters for drinking, flood control, hydropower, and agricultural purposes is that of sedimentation in reservoirs and subsequent decline of dam lifetime. The useful lifetime of a dam is defined as the time necessary for approximately 80% of the volume of its initial capacity to be filled by sediments washed in by water. It ...

2002
N. LEROY POFF

D are structures designed by humans to capture water and modify the magnitude and timing of its movement downstream. The damming of streams and rivers has been integral to human population growth and technological innovation. Among other things, dams have reduced flood hazard and allowed humans to settle and farm productive alluvial soils on river floodplains; they have harnessed the power of m...

Journal: :Geosciences 2022

Flood risk in Italy is a key aspect for the administrative authorities, from national to local level. This especially true Northern Italy, where Po River, most important river of peninsula, and its basin are located. In North-Western Basin described by numerous sub-basins, among which Tanaro River basin: here, last decades, floods have produced significant damage, causing an increased concern r...

2015
Matthew W. Hughes

Airborne light detection and ranging (LiDAR) data were acquired over the coastal city of Christchurch, New Zealand, prior to and throughout the 2010 to 2011 Canterbury Earthquake Sequence. Differencing of preand post-earthquake LiDAR data reveals land surface and waterway deformation due to seismic shaking and tectonic displacements above blind faults. Shaking caused floodplain subsidence in ex...

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