The continued loss of habitat via river damming, water pollution, sand mining, urbanization, land use changes, agricultural practices, and overfishing has led to rapid decreases in the species ...
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For example, in 2000, Chinese authorities banned sand mining in the Yangtze River after extraction had caused the collapse of bridges and riverbanks. 12 However, this led to the massive expansion of sand mining in Poyang lake, which is 300 miles up the Yangtze river from Shanghai. Poyang is China's largest freshwater lake and an important ...
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The Chinese natural sand market totaled $3.1B in 2023, remaining relatively unchanged against the previous year. The market value increased at an average annual rate of +3.4% from 2012 to 2023; however, the trend pattern indicated some noticeable fluctuations being recorded in certain years. As a result, consumption attained the peak level of $3.1B; …
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Here we present a material flow analysis of sand from 1995 to 2020 that shows China's overall sand supply surged by approximately 400% over the study period, yet the proportion of natural sand...
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Natural Sand Imports in China. In 2022, supplies from abroad of natural sands decreased by -88.6% to 575K tons for the first time since 2018, thus ending a three-year rising trend.
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In 2020, the proportion of natural sand compared with total sand supply stood at only around 21 per cent – down from around 80 per cent in 1995. It represents a landmark in the history of human civil engineering, especially considering that China's sand consumption is an outstandingly high percentage of global use.
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Substituted observations refer to observed sediment runoff data for hydrologic stations in eight major river basins in China from 2010 to 2019 (Fig. 1i) 66, which were compared with modelled soil ...
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Approximately 85% existing buildings consume natural sand. Every year over 10.5 billion tons of river sand are used in concrete and mortar all over the world [3, 4]. After decades of rapid development of the construction industry, the total amount of construction industry in China has gradually stabilized.
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In 2019, coal consumption accounted for 57.7 percent of total energy consumption, but this was already a decrease of 10.8 percentage points from 2012; the consumption of so-called clean energy (natural gas, hydropower, nuclear power, and wind power) accounted for 23.4 percent of total energy consumption, an increase of 8.9 …
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For example, sand mining on the Pearl River (Zhujiang) in China has lowered water tables, made it harder to extract drinking water and hastened river-bed scour, damaging bridges and embankments 7 ...
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the supply and demand of construction sand in China from 1995 to 2020. They found that China's sand demand surged with economic growth and urbanization, increasing from 1.4 Gt per year in 1995 ...
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The distribution, composition, sources, and potential ecological risks of polycyclic aromatic hydrocarbons (PAHs) in the sediments of the Lanzhou Reach of the Yellow River, China were investigated. The total concentration of the 18 individual PAHs (∑18PAHs) in the sediments ranged from 638 to 1620 ng/g, with a mean value of 901 ng/g. The pollution …
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The evolution of the Pearl River Estuary (PRE), China in recent decades has been dominated by human activities. Historical admiralty charts and remote sensing images indicated that from 1936 to ...
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Geneva, 07 May 2019 – With the global demand for sand and gravel standing at 40 to 50 billion tonnes per year, a new report by UN Environment reveals that aggregate extraction in rivers has led to pollution, flooding, lowering of water …
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The report Sand and sustainability: Finding new solutions for environmental governance of global sand resources presents how shifting consumption patterns, growing populations, increasing urbanization and infrastructure development have increased demand for sand three-fold over the last two decades. Further to this, damming and extraction have reduced sediment delivery …
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Sand consumption has increased worldwide, ... . Impact of sand minig on the carbon sequestration and nitrogen removal ability of soil in the riparian area of Lijiang River, China. Environ. Pollut. 2020, 261, 114220. ...
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DOI: 10.15244/pjoes/174482 Corpus ID: 266796624; Analysis of Water-Sand Changes and Influencing Factors in the Ganjiang River Basin from 1958-2019 @article{Zheng2024AnalysisOW, title={Analysis of Water-Sand Changes and Influencing Factors in the Ganjiang River Basin from 1958-2019}, author={Siyu Zheng and Jiawei Chen and …
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According to the China Aggregates Association (Ministry of Industry and Information Technology of China, 2019), the annual consumption of aggregates in the country has reached nearly 20 billion tons in recent years, occupying over half of China's material footprint (Jiang et al., 2019).
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To reflect the trend of electricity consumption (EC) in China's Pearl River Delta (PRD) under a balanced environment and economy, this paper proposes an EC forecasting framework from the perspective of optimal economic growth. ... Liu et al. [23] estimated the housing vacancy rate in the PRD from 2013 to 2019 using NPP-VIIRS data, and achieved ...
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China now accounts for around 32% of the world's consumption of nitrogen ... This input can be conceptualised as China's share of the total planetary safe nitrogen boundary. ... (2019). https ...
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China alone has likely used more sand this decade than the United States did in the entire 20th Century. There is so much demand for certain types of construction sand that Dubai, which sits on ...
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The global demand for sand and gravel is at 50 billion tons per year, far exceeding global resource capacities. It reached 7.6 billion tons in 2021 in the Yangtze River Basin (YRB), China. However, production is severely …
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In comparison, annual peak electricity use increases by as much as 36.1% per +1 °C in annual GMST. Although most accurate for Shanghai, our findings could be most credibly extended to the urban areas in the Yangtze River Delta, covering roughly one-fifth of China's urban population and one-fourth of the gross domestic product.
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Here we present a material flow analysis of sand from 1995 to 2020 that shows China's overall sand supply surged by approximately 400% over the study period, yet the proportion of natural sand...
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Assuming that in one year, the Saddang River sand mining operations last for 350 days, the annual production volume can be estimated at 890736 m³/year.
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Second, the social–ecological coupling trajectory of China's Pearl River Delta (PRD) is quantitatively identified in the period between 1980s and 2019, and the impacts of its rapid prosperity ...
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Underground infrastructure projects pose significant environmental risks due to resource consumption, ground stability issues, and potential ecological damage. This review explores sustainable practices for mitigating these impacts throughout the lifecycle of underground construction projects, focusing on recycling and reusing excavated tunnel …
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In China, the Yangtze River is a typical case with decreased sediment load and stable streamflow (Guo et al., 2019). Due to the intensified construction of large hydropower dams, the sediment reaching its delta continued to decrease (Dai and Lu, 2014), and the same changes also were observed in the Pearl River (Liu et al., 2014; Wu et al., 2020).
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The ESs of a river basin mainly include water yield (WY), carbon storage (CS), and soil conservation (SC) (Gao et al., 2019; Souliotis & Voulvoulis, 2021).These services are closely related to human survival, life, and happiness (Gong et al., 2019).Government officials and decision-makers typically aim to enhance one or multiple ecosystem services through the …
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China has over 1320 freshwater fish species, 877 of which are endemic. In recent decades, over-exploitation and landscape pressures have threatened them and led to a severe aquatic biodiversity crisis. In response, large-scale fishing bans have been promulgated to protect freshwater biodiversity in major Chinese rivers since the early 1980s. Here, we present the …
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