نتایج جستجو برای: sand mining

تعداد نتایج: 114337  

Journal: :Sustainability 2023

The development of methodologies for analyzing the evolution and pressures exerted on river channel network is one main concerns researchers today. assessment natural or artificial changes channels beds plays an important role in environmental protection, but also implementation integrated water resource management plans. Given episodic dynamic nature bank bed erosion, along with difficulty rea...

Journal: :Water 2021

Sand mining is one of the major sustainability challenges 21st century. Rates extraction are surpassing sand supply, and ensuing starvation adversely impacting channel-floodplains deltas. Therefore, quantifying mining’s location extent, through global monitoring detection, particularly in fluvial systems, becoming a priority. by dredges barges (extraction secondarily gravel) South East Asian ri...

1999
W. Charles Kerfoot John A. Robbins Lawrence J. Weider Scot Hagerthey

Here we introduce a combined experimental and descriptive approach (termed resurrection ecology) to reconstructing historical perturbations, pointing out how direct tests with sediments and hatched resting eggs complement the traditional descriptive calculation of microfossil fluxes. In the Keweenaw Waterway, a freshwater estuary off Lake Superior, turn-of-the-century copper mining impacted the...

Journal: :Archives of Mining Sciences 2023

Open pit mining of rock minerals and the affected areas requiring further development are a serious challenge for shaping positive image industry among public. The direction method post-mining land reclamation important this image, which should take into account various factors describing area, including social preferences. article presents an example solution – fuzzy system (FSDR) supports sel...

Journal: :Water 2021

Shallow-buried high-intensity mining (SHM) activities commonly in China’s western area will lead to the decrease of groundwater level and soil water content (SWC), which aggravate further deterioration local fragile ecological environment. In this study, applicability limitations six typical dielectric models were comprehensively evaluated based on ground penetrating radar (GPR) technology shal...

2006
Jennifer J. Hinton Marcello M. Veiga Christian Beinhoff

A hot, dry wind envelopes a statuesque woman as she kneels over wind-sifted trays of tinbearing pulverized ore in Uis, Namibia. In Bolivia, a nine-year old girl scrambles down a steep pit wall yet again to refill her bucket of metal-rich sand. And yet another woman stokes the fire in her wood burning stove in the Philippines, releasing the mercury from doré in a poorly ventilated kitchen; the t...

Journal: :Zootaxa 2013
Andreas Kroh Rich Mooi Claudia Del Río Christian Neumann

A new species of abertellid sand dollar, Abertella miskellyi n. sp., is described from the Miocene Camarones Formation of Patagonia, southern Argentina. The new taxon corroborates the existence of the genus in South America, given that Abertella is most common in the southeastern USA and the eastern coast of Central America. It is characterized by a unique basicoronal circle, in which the inter...

Journal: :Water 2023

There have been frequent occurrences of water–sand inrushes in underground mines due to irregular mining activities under thick loose gravel layers. The morphological development characteristics the caving zone and changes geological conditionsin working face a sedimentlayerof Pingan Coal Mine studied. empirical formula numerical simulations are carried out explore effect different thicknesses ...

Journal: :Unifikasi : Jurnal Ilmu Hukum 2022

The facts on the ground show that most mining in Indonesia is carried out using an open pit so it has impact environmental damage. This study aims to determine factors cause iron sand conflicts and develop a concept of conflict resolution Kulonprogo Regency, Yogyakarta Special Region Province. research method used juridical-empirical law research, with juridical case approach, which then analyz...

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