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One highly variable component to river ecosystems is food supply (biomass of primary producers). [39] Food supply or type of producers is ever changing with the seasons and differing habitats within the river ecosystem. [39] Another highly variable component to river ecosystems is nutrient input from wetland and terrestrial detritus. [39]
Environmental threats to rivers include loss of water, dams, chemical pollution and introduced species. [14] A dam produces negative effects that continue down the watershed. The most important negative effects are the reduction of spring flooding, which damages wetlands, and the retention of sediment, which leads to the loss of deltaic ...
Since the flow of a river is rarely static, the exact location of a river border may be called into question by countries. [19] The Rio Grande between the United States and Mexico is regulated by the International Boundary and Water Commission to manage the right to fresh water from the river, as well as mark the exact location of the border. [19]
Rivers such as the Congo, Africa’s second largest river, the Yangtze, which weaves through China, and South America’s Plata saw significant declines, said Dongmei Feng, the study’s lead ...
List of drainage basins by area (including rivers, lakes, and endorheic basins); List of largest unfragmented rivers; List of longest undammed rivers; List of river name etymologies
The headwater of a river or stream is the point on each of its tributaries upstream from its mouth/estuary into a lake/sea or its confluence with another river. Each headwater is considered one of the river's sources, as it is the place where surface runoffs from rainwater, meltwater and/or spring water begin accumulating into a more ...
2]: Length: 290 km (180 mi) [3] 4,876 km (3,030 mi) including the Paraná: Basin size: 3,170,000 km 2 (1,220,000 sq mi) [4] 3,182,064 km 2 (1,228,602 sq mi) [5]: Discharge: : • location: Río de la Plata, Atlantic Ocean: • average: (Period 1971-2010) . 27,225 m 3 /s (961,400 cu ft/s) [5] 22,000 m 3 /s (780,000 cu ft/s) [3]. 884 km 3 /a (28,000 m 3 /s) [6]: • minimum: 12,000 m 3 /s ...
A probable location for Brower's Spring in Montana. Brower's Spring is a spring in the Centennial Mountains of Beaverhead County, Montana that was identified by surveyor Jacob V. Brower in 1888 as the ultimate headwaters of the Missouri River and thus of the fourth-longest river system in the world, the 3,902-mile-long (6,280 km) Mississippi–Missouri River.