Search results
Results from the WOW.Com Content Network
River engineering, a branch of civil engineering, deals with the process of planned human intervention to improve and restore rivers for human and environmental needs. With modern technologies, data collection and modelling, navigation can be improved, dredging reduced and new habitats can be created.
The effects of pollution often depend on the context and material, but can reduce ecosystem functioning, limit ecosystem services, reduce stream biodiversity, and impact human health. [ 75 ] Pollutant sources of lotic systems are hard to control because they can derive, often in small amounts, over a very wide area and enter the system at many ...
Human interference in the form of river engineering can redirect the flow of the water using dams or channelisation. [1] The increasing demand from irrigated agriculture, continued industrialisation, and residential use heavily impacts upon the health of river systems.
From climate change to species loss and pollution, humans have etched their impact on the Earth with such strength and permanence since the middle of the 20th century that a special team of ...
The ongoing pollution of the Ganges, the largest river in the Indian subcontinent, poses a significant threat to both human health and the environment. [1] The river supplies water to approximately 40% of India's population across 11 states [2] and serves an estimated 500 million people—more than any other river in the world. [3] [4]
The flushing flow method involves partially or completely emptying the reservoir behind a dam to erode the sediment stored on the bottom and transport it downstream. [7] [6] Flushing flows aim to restore natural water and sediment fluxes in the river downstream of the dam, however the flushing flow method is less costly compared to removing dams or constructing bypass tunnels.
The original plans included an Environmental Impact Statement that required a tailings dam be built. This would allow heavy metals and solid particles to settle, before releasing the less polluted ‘high-water’ into the river system where remaining contaminants would be diluted. In 1984 an earthquake caused the half-built dam to collapse.
Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.