آخرین محصولات
Sand Dredging in the Yangtze and Mekong Rivers
Population and industry growth has led to environmental and societal issues all by dredging sand in the Yangtze and Mekong Rivers.
of ICT usage and supply on SO emissions in China s …
China's Yangtze River Delta Umair Kashif1, Junguo Shi1, Sihan Li2, ... 2021). On the other hand, ICT usage has remarkably surged from 9.5 trillion yuan in 2011 to 45.5 trillion yuan in 2021 ...
ZHU, Qian. 2022. River-sand Mining: An Ethnography of …
China is a resource-rich country hosting a large variety of mineral resources, and the extractive industries play important roles in the local economy of many regions. But the environmental, economic, and particularly sociopolitical impacts of the extractive industries have received limited attention from scholarly circles. Against this backdrop, River-sand Mining: An Ethnography of …
The deep challenge of nitrate pollution in river water of China
Nitrate pollution in river water is the focus of global attention. The World Health Organization has set an upper NO 3 −-N concentration limit of 10 mg/L for drinking water (Briand et al., 2017; Macilwain, 1995; WHO, 2017).In recent decades, the discharge of point source pollution, such as industrial and domestic wastewater, and numerous chemical fertilizers in …
Influence on compressive strength of concrete by partial …
In comparison to concrete made with river sand, the compressive strength increases at 7 days and is par for 14 and 28 days when using 50% FAGS as the replacement of river sand. The gain in strength at 7 days is reducing with higher percentage of replacement which may be due to continuous geopolymerization process which is going in fly ash.
Sand Mining: A Silent Threat to the River Ecosystem
The actual query is why, given the quantity of different forms of sand, such as desert sand, marine or sea sand, etc., they are not more popular than other varieties of river sand. The features and development of sand (Damodhara Reddy et al., 2020 ; Kondolf, 1994 ; Okur & Erturaç, 2021 ; Tamura et al., 2020 ) provide the solution to this query.
Application of major ions and Sr isotopes to indicate the …
Qaidam Basin is a typical arid endorheic basin with numerous salt lakes that provide abundant mineral resources. River water and groundwater are important sources of salt lakes and play a crucial role in the development of salt lakes (Kong et al., 2014; Fan et al., 2018; Yang and Wang, 2024).Revealing the sources of river water and groundwater is the basis of sustainable …
The recent trends of runoff in China attributable to climate …
The 6th Intergovernmental Panel on Climate Change Assessment Report (IPCC AR6) assessed the increase in global surface temperature at 1.09 [0.95–1.20] °C in …
Anthropogenic perturbations on heavy metals transport in …
Sketch map of the South China (a), the Pearl River Delta region (b), and sampling sites of the Modaomen estuary in 2003 (c), 2015 (d), and 2021 (e), the black dots represent the surficial sediments. ... with the lowest sand fraction. In 2015 and 2021, the sand fraction component exceeded the clay fraction component. The clay fraction component ...
Land use/cover drive functional patterns of bacterial …
The Dongxi River is a rapidly flowing river that comprises its own watershed, which is characterized as a short source (Kaiqi et al., 2021). The Dongxi River watershed spans two administrative districts of Xiamen City, with 85 % and 15 % of its area located in Tong'an District and Xiang'an District, respectively.
China's Silica Sand Market Report 2024
The Chinese silica sand market was estimated at $1.6B in 2023, surging by 10% against the previous year. In general, the total consumption indicated noticeable growth from 2012 to 2023: its value increased at an average annual rate of +2.4% over the last eleven-year period. The trend pattern, however, indicated some noticeable fluctuations being recorded throughout …
Comprehensive maps of material stock dynamics reveal …
Sustainable urban development critically depends on effectively managing the interplay between material stock (MS) and economic growth. This study combined convolutional neural network model and nighttime lights data to map building MS of Yangtze River Delta (YRD) urban agglomeration in China from 2000 to 2020 across 1 km × 1 km pixel scale, then uncovered …
Stocks and flows of sand, gravel, and crushed stone in China …
Stocks and flows of sand, gravel, and crushed stone in China (1978–2018): Evidence of the peaking and structural transformation of supply and demand. ... 2021. CCTV: River sand reaches 340 yuan/square! Construction sites have to be shut down!... China Association of Circular Economy, 2020. Prospect of Construction waste resource utilization ...
Chinese Constructor Fails to Repair Damage to Protected River …
Damaged done to the Tara river by the Chinese motorway construction. Photo: BIRN/Ivan Ivanovic. CRBC is building the Montenegrin leg and 85 per cent of the first section is being covered by a $944 ...
River Research and Applications
The results showed that the Caowei River has generally been scoured since 2006 due to sediment depletion and that the dramatic riverbed downcutting (15.47 m in the deepest cut of thalweg elevation) in the Xiangshuikan reach was likely caused by illegal sand mining which extracted the fine sand underlying the clay overburden in this segment and ...
Sand mining in BRICS economies: Tragedy of the commons …
The study by Nwobodo and Ogbuene (2021) found a significant correlation between sand mining, land use change, and river morphology, with an 8% increase in mining area from 2007 to 2019. Unsustainable extraction of sand results in alterations to land utilisation in the vicinity of the mining area, as indicated by Peckenham et al. (2008) and ...
The Unsustainable Use of Sand: Reporting on a Global …
Sustainability 2021, 13, 3356. https: ... Lijiang River China Illegal Use in China only Operational 2012 Open. ... sand use, monitoring systems, and clean technologies that reduce environmental ...
Microplastic pollution in Yellow River, China: Current status …
Besides the marine environment, river systems also have a higher concentration of microplastics (He BB et al., 2021; Harpah N et al., 2021).Numerous pollution sources of microplastics have influenced the river environment, which may include tail water discharged from sewage treatment plants, the weathering and degradation of plastic wastes in water …
Sandy riverbed shoal under anthropogenic activities: The …
This study examined the sandy reaches downstream of the China Three Gorges Project along the Yangtze River for river erosion and siltation, riverbed morphology, beach evolution, and other physical processes over the past 40 years, to explain the evolution of river geomorphology under human activities, such as reservoirs, improvement projects ...
The effect of land use and land cover on soil carbon storage …
The "Toward Zero Carbon" program was initiated by the United Nations to encourage global efforts to collectively attain a 50.% reduction in carbon emissions by the year 2030 (Bui et al., 2022; Shen and Balezentis, 2023).China, being at the forefront of environmental efforts, has made a firm commitment to halt the growth of carbon dioxide emissions by the …
Poor-quality Chinese concrete could lead to skyscrapers …
A sand scandal is brewing in China, with concerns that low-quality concrete has been used in the construction of many of the country's largest buildings -- putting them at risk of collapse.. The ...
Aeolian sand dunes alongside the Yarlung River in southern …
Analyses of >4,600 sand dune orientations using Google Earth imagery show that the dunes located at the southern and northern sides of the Yarlung River demonstrate opposite sand transportation directions that generally point against the river. This suggests that the sand grains probably originated from the river.
The Unsustainable Use of Sand: Reporting on a Global …
Sand is considered one of the most consumed natural resource, being essential to many industries, including building construction, electronics, plastics, and water filtration. This …
Sediment Routing and Anthropogenic Impact in the Huanghe River …
This study investigates the sediment source-to-sink routing regime of the Huanghe River using Nd isotope finger. Four major source terranes, namely the Songpan-Ganzi (SG) Block, Ordos Desert (OD), Chinese Loess Plateau (CLP) and North China Craton (NCC) are recognized according to their distinct Nd isotopes.
(PDF) RESEARCH THE POSSIBILITY OF USING SEA SAND IN …
Currently, the river sand is becoming depletion leading to a rise in the price of construction material and issues related to the environment such as the depth of the river bed, lowering of the ...
RIVER in Simplified Chinese
RIVER translate: ;;;, （,）. Learn more in the Cambridge English-Chinese simplified Dictionary.
River Sand Pumping Machine
China River Sand Pumping Machine wholesale - Select 2024 high quality River Sand Pumping Machine products in best price from certified Chinese Machine For Plastic manufacturers, Machine For Metal suppliers, wholesalers and factory on Made-in-China
Impact assessment of river sand resource shortage …
More than half of the annual global concrete materials were produced in China due to the rapid developing construction industry, which partly led to the shortage of river sand. However,...
The environmental impacts of river sand mining
Lekomo et al. (2021) performed a physio-chemical analysis on water samples taken from the Toutsang river in West-Cameroon and found that sand mining practices …
Approval for sand export will be on case-by …
LOS ANGELES, Dec 9 — The government has allowed export of river sand on a case-by-case basis based on applications submitted by companies, the Dewan Rakyat was told... Our Facebook page link. Our Twitter page link. Our …
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