Frequent question: What has been a problem caused by the creation of dams for hydroelectric power along the Mekong River?

Hydropower dams have had a dramatic effect on the Mekong river over the last two decades, resulting in unseasonable flooding and droughts, low water levels in the dry season, and drops in the amounts of sediment carried by the river, with drastic consequences for biodiversity and fisheries.

What is the main problem with the building of dams on the Mekong River?

Dams disrupt the migration of fish, preventing them from reaching their spawning grounds upstream and hampering their natural life cycles. This, in turn, could significantly affect fish production in the Mekong, home to the world’s largest inland fishery.

What are some of the problems associated with development along the Mekong River?

The Mekong River ecosystem is on the verge of irreversible collapse due to the accumulative effects of climate change and increased numbers of upstream dams as well as other human-made activities such as deforestation, sand mining, extensive irrigation for agriculture and wetland conversion.

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What effect could building a dam along the Mekong River in Southeast Asia have on different groups who live along the river?

These dams “could cause irreversible and long-term ecological damage to a river that feeds millions of people,” Olson explained. In addition, new dams could push endangered aquatic species such as the Mekong giant catfish further to the brink of extinction.

Why do dam buildings on the Mekong cause international tensions?

The Mekong basin is witnessing an enormous expansion of dam-building for hydropower generation, especially in China and Laos. This has led to diplomatic tensions as countries downstream of the dams fear the negative impacts they may bring about, from greater flooding to seasonal lack of water.

How does the construction of dams on rivers lead to an increase in water pollution?

the water which dams stores is stagnant. this causes diseases as stagnant water give rise to mosquitoes. during the time of heavy rain the gates of dams are opened which causes floods in nearby areas. … so the whole water is contaminated by human, household wastes.

What are the environmental problems in Laos?

Environmental problems in Laos include deforestation, the effects of dam construction, the use of explosives to catch fish, and poaching of wild animals. Efforts to tackle these problems have been disrupted by corruption, lack cooperation and a lack of will.

How has climate change affected the Mekong River?

Warmer and wetter. Across the Greater Mekong region, temperatures have risen by 0.5 to 1.5 ºC in the past 50 years and continue to rise. More frequent and severe droughts and floods are already causing extensive damage to property and loss of life.

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How did the Mekong river get polluted?

The pollution is due in part to the expansion of rice fields from 3.2 million hectares in 1995 to 3.9 million hectares this year and the increased use of fertilizers and pesticides. Another reason is pond expansion to grow pangasius (basa and tra).

How does the Mekong River affect people’s daily lives?

Water from the Mekong River sustains a rich array of wildlife. Its fisheries provide a livelihood for 60 million people. As a source of water and food, it touches the lives of more than 300 million people from over 100 ethnic groups.

Who does the Mekong River affect?

The Mekong River connects China, Laos, Thailand, Cambodia and Vietnam physically and economically. The river is a lifeline for the entire basin, sustaining economies and livelihoods across the entire region.

How does damming of the Mekong River affect the livelihoods of the people and the river’s ecosystem?

River experts say that if the dam-building boom proceeds as planned, it could diminish essential flood pulses and decimate fisheries and riverside gardens that are dependent on variable flows and sediment. That, in turn, would affect the diets and livelihoods of 40 million people dependent on the Mekong.

How many dams does China own?

The tallest dams in China are some of the tallest dams in the world. Nearly 22,000 dams over 15 metres (49 ft) in height – about half the world’s total – have been constructed in China since the 1950s.

Why is the Mekong River so important?

From its source in the Tibetan Plateau to its end in Vietnam, the Mekong River is a critical source of drinking water for the millions of people who live in its watershed.

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