Yangtze River

Flooding: Yangtze Vs. Ganges

Michael Animation, Data & Graphics, Photo August 24, 2016 Leave a reply
ganges_tmo_2015-2016

Ganges River near Patna on August 10, 2015 and August 21, 2016, via NASA

中印看来是两个难兄难弟,两个备受洪水肆虐的文明古国。不过,今年的洪水季,印度恒河的洪水看上去要来得更猛烈些,这场景才更叫看海模式吧!如下图2015年8月与2016年8月的对比动图【NASA原文点这里】:

In August 2016, heavy monsoon rains pushed the Ganges and other rivers in eastern and central India to the breaking point.These images use a combination of infrared and visible light to increase contrast between water and land. Water is blue. Vegetation is green. Notice that the water is a slightly lighter shade of blue in the lower image due to all the suspended sediment in the water.

 

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Floods along the Yangtze 2016, 2011

Michael Animation, Data & Graphics, Photo August 8, 2016 Leave a reply
March 27 vs July 28, 2016 along the Yangtze River

March 27 vs July 28, 2016 along the Yangtze River

以上是一组对比今年3月27日和7月28日长江中游沿岸以及洞庭、鄱阳两大湖水位变化的动图。如果两大湖春季的水位更接近正常的话,恐怕今年汛期的洪灾将更加惨烈。今年的洪灾已经造成了220亿美元的损失,也成为仅次于1998年洪灾的中国第二大最具破坏性的天气灾害事件,也是1980年有记录以来全球(美国以外)第五大最具破坏性的自然灾害事件(下图)。【NASA原文点这里

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GIF: Floods Seen From Space

Michael Photo May 9, 2016 Leave a reply

Floods can be devastating, and they can be surreal too, seen from space. This below, thanks to NASA Earth Observatory, shows a flood event in 2011 that looks like a giant bulldozer having widened the whole James River, meanwhile smoothing out all the twists and turns along the way.

A tributary of the Missouri River, the James River experienced significant flooding in the spring of 2011. In early June 2011, the river was high enough to fill the river valley near the town of Mitchell, South Dakota.

A tributary of the Missouri River, the James River experienced significant flooding in the spring of 2011. In early June 2011, the river was high enough to fill the river valley near the town of Mitchell, South Dakota.

And here is a scene on Missouri River, also seen from space:

By early June 2011, the Missouri River had risen enough to submerge normally dry land, including some agricultural land, west of Lewis and Clark Lake.

By early June 2011, the Missouri River had risen enough to submerge normally dry land, including some agricultural land, west of Lewis and Clark Lake.


Here are a bunch of floods in China over the years, and the river monsters were pretty horrific, visually:

Flood waters continue to rise on the Amur (Heilongjiang) River and its tributaries in northeast China and southeast Russia. The floods are affecting millions, forcing evacuations, closing ports, and claiming at least 85 lives. The floods are expected to peak in early September.

Flood waters continue to rise on the Amur (Heilongjiang) River and its tributaries in northeast China and southeast Russia. The floods are affecting millions, forcing evacuations, closing ports, and claiming at least 85 lives. The floods are expected to peak in early September.

Summer rains have swollen rivers throughout northeastern China, including the Songhua River. Water levels peaked in Harbin on August 27, 2013, and have remained high. The Songhua River is one of many tributaries of the Amur (Heilongjiang) River, which is experiencing its most severe floods in a century.

Summer rains have swollen rivers throughout northeastern China, including the Songhua River. Water levels peaked in Harbin on August 27, 2013, and have remained high. The Songhua River is one of many tributaries of the Amur (Heilongjiang) River, which is experiencing its most severe floods in a century.

The recent floods followed months of devastating drought, China Daily reported. Prior to the torrential rains, 3.5 million people endured water shortages. Although the rain brought much-needed moisture, it also brought deadly floods and landslides. As of June 28, nearly 100 people had died and about 27,000 homes had been destroyed.

The recent floods followed months of devastating drought, China Daily reported. Prior to the torrential rains, 3.5 million people endured water shortages. Although the rain brought much-needed moisture, it also brought deadly floods and landslides. As of June 28, nearly 100 people had died and about 27,000 homes had been destroyed.

GIF: Dams on Yangtze (Three Gorges) and Euphrates

NASA reminded me again of its satellite images of the Three Gorges Dam before and after the construction of the dam. Here below I dug up the before and after images and present in a simple GIF, watch for the tremendous expansion of the water surface on the Yangtze River and its numerous tributaries in this mountainous region:

Three Gorges Dam: 2000-2006 Views from Satellite (via NASA)

Three Gorges Dam: 2000-2006 Views from Satellite (via NASA)

Here below is another extreme case of changes, the human extraction of water largely contributing to the sudden shrinking of reservoir along the Euphrates River:

Shrinking of Qadisiyah Reservoir between 2006 and 2009 (via NASA)

Shrinking of Qadisiyah Reservoir between 2006 and 2009 (via NASA)

Scientists using the twin gravity-measuring satellites of the Gravity Recovery and Climate Experiment (GRACE)have found that a large portion of the Middle East lost freshwater reserves rapidly during the past decade. The research team observed the Tigris and Euphrates river basins—including parts of Turkey, Syria, Iraq, and Iran—and found that 117 million acre feet (144 cubic kilometers) of fresh water was lost from 2003 to 2009. That amount is roughly equivalent to the volume of the Dead Sea. About 60 percent of the loss was attributed to the pumping of groundwater from underground reservoirs.