Resulted in sedimentation, increased runoff, flash floods, and uncontrolled water logging . The effects of deforestation in synergy with seasonally variable flow of river increase frequency and intensity of floods affecting profoundly and drastically human population and freshwater ecosystem . Of that, only about 1.2 percent can be used as drinking water; the rest is locked up in glaciers, ice caps, and permafrost, or buried deep in the ground. From each river’s source, the water meanders through the landscape meeting up with other streams and shaping civilization as we know it. Teach your students about the Earth’s rivers and streams with the resources in this collection. Physical disturbance owing to spates can have a significant influence on the structure and dynamics of periphyton assemblages in streams.

Discover the differences between an environment and an ecosystem and understand the levels of organization in an ecosystem. A current is the steady, predictable movement of a fluid within a larger body of that fluid. tinkers construct more materials Fluids are materials capable of flowing and easily changing shape. He is also involved in the Riverfly Partnership, a group which monitors the water quality of rivers to protect the habitat of a range of flies.

Some suggestions are worth mentioning to achieve sustainability in the park ecosystem (Direc­torate, Kaziranga National Park, 2002). There is a correlation between the magnitude of flood and the quantity of biodiversity of the area. Flood causes animal as well as floral morality in the national park. Moreover, the stated relation between flood and quantity of biodiversity can be emphasized with the comparison of the percentage increase/decrease in some selected animal population and flood level taken in different areas of the park in different years . It also corre­lates with the percentage area submerged by flood in different years.

Long blamed on dams and irrigation, researchers have found that its water loss also comes from fluctuating temperatures which have negatively impacted its second most important river, the Komadugu Yobe. Intensive fishing in the river is performed using bottom trawls; its consequences are complete removal of aquatic living resources on the bottom and in the near bottom water layer. At the same time, despite its high productivity, the Mekong River system is poorly studied in many aspects of its resources and ecology, including fish and invertebrates . Studies of fish resources have been local and mainly † Deceased. Focused on biological assessment of the richness and diversity of fish resource extraction per fishing effort .

‘Stagnant water can lead to the formation of blue green cyanobacteria blooms,’ Anne says. ‘As well as contributing to eutrophication, they also produce toxins that are toxic not only to fish, but also to any humans or dogs that drink the water. Slower moving rivers, or those which have become blocked, can promote the growth of toxic algae which prefer these conditions. While some releases may be partially treated, those from storm overflows are raw and diluted only by rainwater.