نتایج جستجو برای: dam impoundment

تعداد نتایج: 13224  

Journal: :Remote Sensing 2023

Lakes are an important part of the Earth’s surface. Poyang Lake is China’s largest freshwater lake with complex hydrological relationships and unique rhythmic changes. There no systematic understanding relationship between watershed area river–lake connectivity. In this study, using remote sensing imagery, data, meteorological land use surveys, we investigated changes in water from 1977–2021. a...

Journal: :Aquatic Conservation-marine and Freshwater Ecosystems 2023

This study examined whether protected land in a tropical reservoir's catchment can promote the survival of native aquatic plants (macrophytes) and limit spread invasive alien plant species (macrophyte IAS), which threaten wildlife require expensive remediation. As number river dams is expected to increase coming decades meet societal demands, it crucial explore solutions for preserving biodiver...

2002
T. E. Martin M. P. Davies

Tailings impoundments frequently represent the most significant environmental liability associated with mining projects, both during the operational and decommissioning phases of a project. A spate of recent and well-publicized incidents involving tailings impoundments has placed the mining industry in general, and those responsible for tailings impoundment design and safety in particular, unde...

2014
Jesica Murray Alicia Kirschbaum Bernhard Dold Elisa Pannunzio

Secondary jarosite and water-soluble iron-sulfate minerals control the composition of acid mine waters formed by the oxidation of sulfide in tailings impoundments at the (Zn-Pb-Ag) Pan de Azúcar mine located in the Pozuelos Lagoon Basin (semi-arid climate) in Northwest (NW) Argentina. In the primary zone of the tailings (9.5 wt % pyrite-marcasite) precipitation of anglesite (PbSO4), wupatkite (...

2000
Jimmie Pigg Mark S. Coleman Jay Wright

Between 1976 and 1996 the fish of the Deep Fork River were sampled at three sites. A total of 163,358 specimens from 36 species was taken. To determine if changes had occurred since 1976 as a result of modifications in the aquatic environment, the fish communities at each of the three sampling stations were compared. Three periods during which well defined environmental changes that resulted in...

Journal: :Remote Sensing 2015
Zhubin Zheng Yunmei Li Yulong Guo Yifan Xu Ge Liu Chenggong Du

Assessing the impacts of environmental change and anthropogenic activities on the historical and current total suspended matter (TSM) pattern in Dongting Lake, China, is a large challenge. We addressed this challenge by using more than three decades of Landsat data. Based on in situ measurements, we developed an algorithm based on the near-infrared (NIR) band to estimate TSM in Dongting Lake. T...

Journal: :Water 2021

Deposits in dam areas of large reservoirs, which are commonly composed fine-grained sediment, important for reservoir operation. Since the impoundment Three Gorges Reservoir (TGR), sedimentation pattern area has been unexpected. An integrated dynamic model consists both sediment transport with water flow and gravity-driven fluid mud at bottom, was proposed. The incipient motion driven by gravit...

Journal: :Water 2023

The Baihetan Reservoir was impounded on 6 April 2021, after which the water level rose significantly. Notably, one week of impoundment, microseismic activities were prominent around reservoir area, highly associated with change. From 2021 to 31 December over 7000 microearthquakes recorded by seismic stations in vicinity reservoir, including 12 ML > 3 events. maximum 21 ML3.9 earthquake Qiluo...

Journal: :Fluids 2022

This companion paper presents the results of a series numerical experiments examining effects mitigation canal on hydrodynamics tsunami-like turbulent bore proceeding over horizontal bed. The hydraulic bores were generated by dam-break setup which employed impoundment depths do = 0.20 m, 0.30 and 0.40 m. propagated downstream impoundments in flume interacted with varying geometry located downst...

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