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We have altered the world in ways that benefit us greatly. They prevent species such as eels from migrating – isolating previously connected populations. When the first Earth Day was held in 1970, pesticides were killing bald eagles, and soot was darkening the sky. Impact of Human Use Rivers for Water Two -thirds of water used in Britain comes from river and lakes, a third from the groundwater. One of the biggest problems today is eutrophication i.e. These organisms can affect native species. Reducing stocks of a particular species can have an effect on other species such as birds that feed off river fish. This is to keep a check on perhaps the most dangerous of all of our effects on rivers... Pollution! The clearing of forests to produce farmland has led to on-going erosion, with large quantities of sediment deposited into rivers. They can easily migrate to many areas affecting native species. This is due to many of the human activities like travel, power. The larger boats still need the deeper channels and smaller craft require the removal of water plants, thus reducing habitat for wildlife. One of the main ways is through pollution. Pollution can lower the pH of the water, affecting all organisms from algae to vertebrates. While dams can benefit society, they also cause considerable harm to rivers. The longest river in Britain is the River Severn, which is 354km long. Strict bye-laws now control the discharge of effluent (waste discharged from a particular process) by riverside industry but modern development still presents problems. Humans have increasingly modified the natural environment by shaping it to its needs. Every year, up to 11,000 tonnes of rubbish are collected from the Thames! How Humans Have Impacted the Nile River Introduction of the Nile Perch Pollution The fishing industry has heavily impacted the Nile River including the introduction of the Nile perch to both the river and Lake Victoria. Rivers are connected systems, and dams disconnect one area from another. Urban areas add to this pollution when contaminants (PAHs and heavy metals) are washed off hard surfaces such as roads and drain into water systems. We interrupt water pathways in two ways: 1. The Young People's Trust for the Environment is a charity which aims to encourage young people's understanding of the environment and the need for sustainability. Changes in water temperature due to flow modification can affect insect development by not allowing them to complete their life cycle. The activity Monitoring stream health and interactive Stream health monitoring and assessment provide step-by-step instructions, protocols, recording sheets and how-to videos for monitoring stream health. Impacts on a species or a non-living element may have long-term consequences for a river ecosystem. The Paterson and Williams Rivers rise in the Barrington Tops and drain the higher rainfall area, north-east of the catchment, with both rivers flowing south into the Hunter estuary. Sulfur dioxide and nitrous oxide emitted from factories and power stations enter river systems through acid rain. Favorite Answer . The following things can be the source of types of river pollution; The Environment Agency (EA) keeps an eye on the rivers and tries to prevent people causing pollution. Humans pollute the land, water and air with unwanted refuse. Once established, these species can be difficult to control or eradicate, particularly because of the connectivity of the flowing river. Our larger rivers, such as the Thames and the Severn, were used by large industrial boats and, as a result, stretches of the rivers had to be dredged deeply to maintain a deep channel.

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