Potential place for gravel and sand exploitation in the circular economy

Riverbeds and coastal parts of major rivers in their lower parts have significant resources of gravel and sand which are of paramount importance for the construction industry. The exploitation of the mentioned resources has negative consequences on the river regime in the first place and on the environment as well. Taking into account that modern world and industry will need these mineral raw materials in the future, it is necessary to find ways to correct the negative consequences or minimize what can be achieved through the circular economy. Open pits remain abandoned after completion of exploitation. They pose a danger for the environment, become wild landfills, a habitat for mosquitoes, insects, and rodents, also they can lead to pollution of groundwater, etc. With a certain amount of investment, these sites can become fishponds, places for walking, swimming, cycling, and other touristic and sport activities.