Impacts of sand mining on rivers may be direct or indirect (Figure 1). Direct impacts are those in which the extraction of material is directly responsible for the …
Mining of sand from the layer representing the channel sand in floodplain areas is referred to as floodplain mining (Fig. 3.1). 3.2.3 Terrace Mining. In this book, …
WWF is a solution-oriented advocate of clean flowing rivers that believes that by better understanding and communicating the impacts of sand mining – aggregate extraction encompasses sand, gravel, pebbles or cobbles, but is collectively referred to as sand mining – on rivers, the organisation can influence key decision-makers to ensure that ...
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.
An analysis of the Kangsabati River in India, for example, found that mining activity is changing how the river flows. Mining of Suriname's beaches has shrunk Braamspunt beach, an important habitat for nesting sea turtles. And sand removal from the coasts of Mozambique led to unprecedented flash flooding.
Digging your own grave': Illegal sand mining devastates an Indian river. Large-scale industrial mining, on the other hand, involves the excavation of substantial mineral and metal reserves often found in river basins.This type of mining can cause significant disturbances, leading to the displacement of vast amounts of soil and rock, …
Reviewing existing scientific papers, the WWF's research highlighted numerous physical impacts attributable to sand mining from changes in the shape of …
River sand mining is also contributing to the slow-motion disappearance of Vietnam's Mekong Delta. The area is home to 20 million people and source of half of all the country's food and much ...
Vietnam is a prime example of a little-known global threat: the mining of river sand to build the world's booming cities. In An Giang Province, Vietnam, a half-mile stretch of riverfront along ...
Rivers are one of the main sources to supply sand and gravel for construction projects. Depending on river morphology and hydraulic characteristics, its sediment transport capacity, and mining operation method, the extraction of river bed materials may affect its ecosystem through bank and bed erosion. To advance the …
The sand acted as an aquifer, regulating the river's flow. But sand is also a crucial ingredient in concrete, and India is urbanizing at a speed and scale virtually unmatched by any country in ...
Here we report the environmental effects of river sand mining from the small rivers (catchment area < 10,000 km 2; Milliman and Syvitski 1992) debouching into the largest marginal lagoon, in the southwest coast of India, the Vembanad lake. These rivers are being subjected to indiscriminate sand extraction over the past 3–4 decades …
Sand mining has led to deepening and widening of the Lake Poyang channel, the largest freshwater lake in China and a biodiversity reserve of exceptional importance, and to an increase in water discharge into the Yangtze River. This may have influenced the lowering of the lake's water levels, which reached a historically low level in 2008.
There are plenty of engineering methods to diminish environmental issues related to sand and gravel mining in rivers, floodplains, and terraces (Ministry of Natural Resources, 2009). The method used must consider the characteristics of specific hydrologic system. The primary root of environmental issues on in-stream excavation is the …
Although sand mining is sometimes said to have positive impacts, which reduces river flooding by deepening and widening channel courses that provides more lateral space to a channel and also ...
7.5.1 Impact Assessment Using Matrix Method. Sand extraction from river channels could cause local disruptions in the river environment. After recording various environmental problems of river sand mining in different physiographic zones, an EIA was carried out to suggest appropriate Environmental Management Plan (EMP) for …
A river channel is evolved into different bed form units depending on the changes in flow energy and sediment discharge through the system. Indiscriminate sand mining is one of the most destructive anthropogenic activities (Plate 4.1) hindering the natural stream bed evolution.A better understanding of the general distribution, sources, …
"Unsustainable sand mining is a concrete threat to rivers, deltas and coastal areas across the world and the people and nature that rely on them," comments Lee. "Largely unregulated and ungoverned, sand mining leads to significant social and environmental impacts, from shrinking deltas to the loss of biodiversity.
We break down everything you need to know about sand mining. Sand is the most mined substance in the world, with a significant amount of illegal mining activity from "sand mafias". Image credit: Wikimedia Commons. Sand is the single most mined commodity, eclipsing minerals and metals by a colossal margin. Around 85% of the …
The 2020 guidelines for sand mining stress on protecting rivers and habitats of species including turtles and calls for such sensitive areas to be declared as no-mining zones. It also called for using the …
Sand mining has become a lifeline to many unemployed youths in Sierra Leone. The price of a tonne of sand in the country rose from US$25 in 2012 to $200 in 2021. Most of what is mined goes to a booming local construction sector, and growing demand to feed neighbouring Guinea's glass manufacturing industry is also driving up …
Sand mining is the process of extracting sand from an open pit, sea beaches, rivers and ocean beds, river banks, deltas, or inland dunes. The extracted sand can be used for various types of manufacturing, such as concrete used in the construction of buildings and other structures.
Impacts of sand mining on rivers may be direct or indirect (Figure 1). Direct impacts are those in which the extraction of material is directly responsible for the ecosystem impact, such as due to the removal of floodplains habitat. Indirect impacts are related to ecosystem changes that are propagated through the system due to physical changes ...
At a global scale, current rates of sand mining from both coasts and rivers (~40,000 Mt yr −1) 4 significantly outstrip estimates of total global fluvial sediment discharge ...
3.4 Manual and Mechanical Mining River sand mining is carried out both manually and mechanically. Manual mining is more environment-friendly and the quantity of mining is practically low. This method is practiced in many developing and underdeveloped countries having small rivers with limited river bed resources (Plate 3.2). Usually country ...
Sand and gravel mining may be allowed to maintain the natural flow capacity based on surveyed cross-section history. Alternatively, off-channel or floodplain extraction (see …
The impact of sand mining on the river's ecology is exacerbated by many mega-dam developments upriver that obstruct sand replenishment downstream (B. Hu et al. Hydrol. Earth Syst. Sci. 13, 2253 ...
Sand mining activities in the river can also affect the amount of sand transported by the river [28, 29]. After 2000, illegal sand mining was banned in the Yangtze River mainstream, and in ...
Illegal sand mining, also known as sand theft or sand poaching, refers to the unlawful extraction of sand from rivers, beaches, or other natural environments. It is a widespread environmental problem with significant ecological, social, and economic consequences. Illegal sand extraction can have severe environmental consequences.
But sand mining in rivers and on beaches continues to expand in many developing countries. It is often a lawless business, beset by corruption and violence. In …
