Both above- and below-ground plant traits are known to modulate feedbacks between vegetation and river morphodynamic processes. However, how they collectively influence vegetation establishment on ...Web

China's military escalation and ban on natural sand export to Taiwan may impact semiconductor manufacture and trade. The island's supply to the world may dwindle as conflict and sanctions impact 64 per cent of the world's semiconductor source. In a series of retaliatory measures taken against Taiwan to apparently punish it for inviting US ...Web

This paper focuses on the streamwise migration of the erosion center along the ∼400-km-long Yichang to Chenglingji reach (YCR) downstream of the Three Gorges Dam (TGD), China. We analyzed channel morphological adjustment based on water, sediment and channel geometry data collected during 2002–2020.Web

Gravel mining in the upstream reach of the Yangtze River adversely affects the river geomorphology, environment, and navigation conditions. According to the analysis done using the field measurements, the total volume of gravel mining is 1.76 billion m 3, distributed among nine gravel-mined river sections in the upstream reach of the Yangtze ...Web

The Qianwei dike, located along Minjiang River in Sichuan Province, China, is to be built on a foundation composed of sand and gravel, with a length of 2.77 km and a maximum height of 14.1 m. Concrete-faced rockfill dams (CFRDs) have been practiced on similar foundations with poor results due to overtopping and leakage problems.Web

Gravel-sand mulch has been found to negatively affect the sustainability of soil organic matter and soil symbiotic microbes ... (China) (no. 2022BBF02033), the National Natural Science Foundation of China (no. 32101447), the Key Research and Development Program of Ningxia (China) (no. 2021BBF03011), and the Ningxia Academy of …Web

Soils containing gravel (particle size ≥2 mm) are widely distributed over the Qinghai–Tibet Plateau (QTP). Soil mixed with gravel has different thermal and hydrological properties compared with fine soil (particle size <2 mm) and thus has marked impacts on soil water and heat transfer. However, the most commonly used land models do not consider …Web

The meeting led to the birth in 1950 of two new national organizations — the All-China Federation of Natural Science Societies and the All-China Association for Science Popularization. In September 1958, the two organizations decided at their joint congress to merge into a unified single organization — the China Association for Science and ...Web

Gobi Desert, China Natural sand exports from all countries totaled US$1.81 billion in 2022. That dollar amount reflects an average 5.4% increase over the five-year period starting in 2019 when globally exported sand was worth $1.71 billion. Year over year, the value of exported natural sands rose 6.5% compared to $1.7 billion during 2021.Web

The China Bicycle Association predicts that China's bicycle and e-bike industries will grow by around 10 percent and 20 percent respectively in 2021. "Bicycles could be said to be China's second ...Web

China Association of Travel Services (CATS) is a national and industrial public organization established in 1997, and was voluntarily formed by domestic travel services, enterprises and institutions providing services for travel services, and social organizations related to travel services. It is a nation-wide industry association registered in ...Web

ROCKPAC works to support candidates who understand and appreciate the value of aggregates operation and are committed to promoting sensible, scientifically-based safety and environmental laws and regulations. The aggregates industry's voice is heard loud and clear in Washington, D.C., through the relationships that NSSGA members build with ...Web

At present, 118,000 ha of such fields are distributed in Gansu Province of northwest China. Some experimental work on gravel and sand mulches and/or stony soils has revealed some theoretical principles underlying the beneficial effects of a stone mulch, which indicated that stone or gravel mulch was effective in reducing evaporation and …Web

Gravel morphometric analysis based on digital images of different Gobi surfaces in Northwestern China. Journal of Desert Research, 34(3): 625–633. (in Chinese) Google Scholar Qin Y, Yi S H, Chen J J, et al. 2015. Effects of gravel on soil and vegetation properties of alpine grassland on the Qinghai-Tibetan Plateau.Web

In 2020, the crude steel output of the top 10 steel enterprises in China accounted for 39 percent of the total national output, an increase of 4.6 percentage points over 2015, according to the China Iron and Steel Association. A worker works at a factory of Ben Gang Group Corporation in Benxi, northeast China's Liaoning Province, Aug. 18, …Web

China remains the largest gravel and crushed stone producing country worldwide, comprising approx. 24% of total volume. Moreover, gravel and crushed stone …Web

Distribution of Scaly-sided Merganser flocks and gravel bar patches in the 36 km river section of the lower Yuanjiang River. The red dots indicate 127 Scaly-sided Merganser flocks recorded over ...Web

Sedimentology, geochronology, and provenance of the late Cenozoic "Yangtze Gravel": Implications for Lower Yangtze River reorganization and tectonic evolution in southeast ChinaWeb

A large number of landslides were triggered by the Mw7.9 Wenchuan earthquake which occurred on 12th May 2008. Landslides impacted extensive areas along the Mingjiang River and its tributaries. In the landslide deposits, soil and gravel fragments generally co-exist and their proportions may influence …Web

The Michigan House of Representatives is considering legislation that would take local government control away when it comes to rock, sand, and gravel mine permits. Supporters of the change say too many townships are denying permits. The people who build roads are pushing the package of bills. This is not the first time this legislation has ...Web

Marc Goichot. February 11, 2021. The world's largest extractive industry gets little attention. Each year up to 50 billion tonnes of sand and gravel – known collectively as aggregate – are mined from …Web

The National Mining Association 2023 Mining Facts. If ever there were doubts around the necessity of mining, ... China is the #1 supplier of ... gravel, soda ash, stone, tripoli, wollastonite, zirconium 12 13. CA ID MT WY AZ NM UT AK HI CO ND SD OK TX NE KS LA AR MO IA MN MI WIWeb

In north-west China, extensive areas of gravel desert exist, whose surface properties have an important effect on the wind-erosion threshold friction velocity $$ u_{*t} $$ u ∗ t . In this study, we use four models and field observations of gravel mass fraction, soil physical crust, and soil clay content to assess the effect of gravel-surface properties …Web

This research was supported by the Shandong Provincial Natural Science Foundation, China (No. ZR2020QE265), the National Natural Science Foundation of China (Grant No. 42172310), and Shandong Provincial Key Research and Development Program (No. 2019JZZY010428).Web

In 2009, sand and gravel accounted for 43% of global material extraction of which 87% was mined from terrestrial sources, such as quarries and pits . Lake Poyang in China is the largest known area of sand mining activity globally, where extraction rates were estimated, using remote sensing techniques, at 488 Mt during 2005–2006 .Web

In this paper, high-resolution (1.5 m resolution) remote sensing images are combined with data-processing software, such as ENVI, ArcGIS, and Fragstats, to evaluate ecosystem service quality and compute the landscape pattern in the Haidian District (Beijing, China), so that the relationship between the ecosystem service quality and landscape ...Web

This article provides an overview of the use of sand and gravel in China, including current supply and demand conflicts and the impacts of mining, transportation, …Web

Gravel mining companies say townships are too frequently denying the permits. Doug Needham, head of the Michigan Aggregates Association, said that increases travel distance for trucks hauling aggregate, as well as emissions and costs. "When aggregate mining is permitted closer to major projects, trucking costs are reduced.Web

Aggregates prices remain high in China. Chinese aggregates prices are remaining at a generally high level in most parts of the country, according to the China …Web

Cumulatively, dams are thought to trap 77-99% of the natural sediment flows of China's large rivers, based on research on the Yangtze. What still gets through the barriers is mainly fine sediments like silt and clays, not sand or gravel. As a result, riverbeds and banks are not replenished, making sand mining downstream even more ...Web

Gravel mulch is an agricultural water conservation practice that has been widely used in the semi-arid region of northwest China, but its effectiveness is now lessening due to soil degradation caused by long-term gravel mulching. In this study, we report on a 6-year-long gravel mulch experiment conducted in the northwestern Loess …Web

Gravel bars can be critical for biodiversity conservation: a case study on scaly-sided Merganser in South china. ... The findings provide a quantitative association between wintering habitat of Scaly-sided Merganser and geomorphic features, as well as human disturbance, an association that previous research has documented in only …Web