نتایج جستجو برای: dam impoundment

تعداد نتایج: 13224  

2012
Fan Xiao

After the May 12, 2008 earthquake in Wenchuan, Sichuan, suspicion grew among Earth scientists that the Zipingpu Dam reservoir had triggered the devastating earthquake, which killed more than 80,000 Chinese citizens. Since then, some 50 to 60 articles and studies have investigated this massive seismic event and its relationship to the Zipingpu reservoir. This paper reviews the literature and con...

Journal: :Revista de biologia tropical 2011
Theodore Quarcoopome Francis Amevenku Patrick Ofori-Danson

The Kpong Headpond was the second created on the Volta River after Akosombo Dam, primarily as a source of hydroelectric power generation and potable water supply, and additionally, it has supported some fish production in Ghana since impoundment. The changes in fish community of the Kpong Headpond were studied to provide baseline information for strategies formulation to support the socio-econo...

Journal: :Journal Of Geophysical Research: Solid Earth 2021

Four large hydropower stations have recently been built downstream the Jinsha River in Southwestern China with a strong regional tectonic activity background. There is widely felt seismicity since impoundment of Xiluodu and Xiangjiaba reservoirs, increasing public concern this region. We begin criticality analysis faults near these reservoirs to quantify their susceptibility triggered seismicit...

Journal: :Remote Sensing 2021

Dongting Lake plays an important role in water regulation and biodiversity protection, but it is vulnerable to climate change human activities. To quantify surface changes factors driving them, long-term variation was investigated using the multiple spectral indices method based on a decision tree classification for full time-series Landsat MODIS datasets. Factors influencing were explored by c...

2008
John G Williams Richard W Zabel Robin S Waples Jeffrey A Hutchings William P Connor

Although evolutionary change within most species is thought to occur slowly, recent studies have identified cases where evolutionary change has apparently occurred over a few generations. Anthropogenically altered environments appear particularly open to rapid evolutionary change over comparatively short time scales. Here, we consider a Pacific salmon population that may have experienced life-h...

2010
Desiree Tullos Philip H. Brown Kelly Kibler Darrin Magee Aaron T. Wolf

Following the principles and priorities outlined by the World Commission on Dams, managers are increasingly considering a greater variety of impacts in their decision making regarding dams. However, many challenges remain in evaluating the biophysical, socioeconomic and geopolitical impacts of dams, including the potential diversity of stakeholder perspectives on dam impacts. In this analysis, ...

Journal: :ISPRS Int. J. Geo-Information 2017
Jian Mao Shandong Wang Jianhua Ni Changbai Xi Jiechen Wang

Flood disasters from dam breaks cause serious loss of human life and immense damage to infrastructure and economic stability. The application of Geographic Information System technology integrated with hydrological modeling for mapping flood-inundated areas and depth can play a momentous role in further minimizing the risk and possible damage. In the present study, base terrain data, hydrologic...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1998
G B Dalrymple W K Hamblin

At least 13 times during the Pleistocene Epoch lava flowed into the inner gorge of the Grand Canyon and formed lava dams, as high as 600 m, that temporarily blocked the flow of the Colorado River. K-Ar ages on these lava dams indicate that the seven youngest formed within a short period of time between about 0.6 and 0.4 mega-annum (Ma). The physiography of the lava dam remnants within the canyo...

2014
Zhijun Dai James T. Liu Wen Wei Jiyu Chen

While most large river-deltas in the world are facing the risk of subsidence and erosion in the Anthropocene, it is suspected that the Changjiang submerged delta (CSD) could be subjected to the impacts of the world's largest dam, the Three Gorges Dam (TGD). Here we firstly indicate that the CSD went through high accumulation (1958-1978); slight accumulation (1978-1997), slight erosion (1997-200...

2010
WENDELL R. HAAG

1. Patterns of mussel diversity and assemblage structure in the Sipsey River, Alabama, are described. Qualitative data were used to describe river-wide patterns of diversity. Quantitative data were used to describe the structure of mussel assemblages at several sites based on whole-substrate sampling that ensured all size classes were detected. 2. Major human impacts to the stream are limited t...

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