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2012-08-07 00:00
Water Shortage
The
Yellow River only accounts for 2% of the total water volume in China.
However, it feeds 12% of the population and irrigates 15% of lands in
China. Moreover, it has the responsibility to dispatch water to the
outer-basin area, such as Qingdao, Tianjing, Hebei Province, etc.
Currently, the exploitation rate of the Yellow River exceeds 50% and is
beyond the internationally agreed limitation which is 40%.
Since
1970s, river dry-up occurred from time to time in the lower reaches of
the Yellow River. Since 1985, the lower reaches of the Yellow River have
almost dried up annually. Due to the Yellow River’s dry-up, from 1992
to 1996, the direct economic loss in the Yellow River basin was 26.8
billion Yuan; Due to the Yellow River’s dry-up, there were 7.042 million
mu of drought-affected farmland in Shandong and Henan provinces and
caused 10 billion kg crop failure; Due to the Yellow River’s dry-up, in
1996, the Shengli oil field had to use the sea water to replace the
industry water use and suffered the serious erosion of the oil
equipment. Due to the Yellow River’s dry-up,millions of people in the
city and rural area along the Yellow River faced the serious drinking
water crisis. In 1992, the Yellow River dried up for two months. In
Dongying city, the estuary of the Yellow River, the drinking water could
only sustain for 7 days even though the water supply to the industry
was cut off. In Binzhou city, in case of cutting off all the industrial
and agricultural water supply, a total population of 500 thousand people
and 270 thousand livestock still had difficult access to the drinking
water; Due to the Yellow River’s dry-up, the wetland environment was
imbalanced in the Yellow River delta wetland. In the Yellow River delta
wetland reserve, more than 8000 aquatic organisms, hundreds of wild
plants and 180 kinds of birds’ life and breeding were seriously
threatened by the water shortage. In 1997, the zero flow lasted for 226
days in the lower reaches of the Yellow River. The dry-up section went
upstream to somewhere near Kaifeng, Henan province and broke the new
record of the dry-up history. The life of the Yellow River faced the
crucial water crisis.
The Yellow River has played an essential
role in the development of Chinese civilization. She is called "the
cradle of Chinese civilization"and the mother river of the Chinese
nation.As early as 1.1 million years ago, Lantian man had multiplied in
the Yellow River basin. The prosperous ancient Chinese civilization such
as famous Yangshao Culture, Longshan Culture, Dawenkou Culture,
Majiayao Culture, etc boomed in this vast cradle….Xia, Shang, Zhou, Qin,
Han, Tang and Song and other dynasties had set up their capitals in
this prosperous region. Undoubtedly, without the Yellow River, there is
no Chinese nation.
“The Yellow River water comes from the heaven
and enters into the sea without returning”. The overwhelming Yellow
River is the symbol of Chinese nation. No other rivers like the Yellow
River could capture the soul of the Chinese nation. The Yellow River has
the same relationship with China as the relationship between the Nile
and Egypt. Without the Yellow River, the consequences would be far
beyond the disaster of feeding 150 million people, it would be China’s
sorrow and the pain in the heart of all the Chinese people forever. Save
the Yellow River, protect the Yellow River, and keep our root.
Water Pollution
Traditionally,
the Yellow River basin is mainly the agricultural production area. In
the past 20 years, with the industrial and urban development in the
Yellow River Basin and the urban population explosion, the industrial
pollution, urban living pollution and agricultural non-point source
pollution is being aggravated continually. The water pollution crisis
presents gradually. At present the total amount of the wastewater
discharged into the Yellow River has reached 4.2 billion m3 each year,
which doubles the amount in the 1980s, the pollutants entering into the
Yellow River has exceeded the carrying capacity of the Yellow River.
Based
on the recent water quality monitoring data, only 1,750 km of the river
channel, or 13.9 percent of the river, where the water quality is
classified as type IandII with good quality; 2,160 km of the river
channel, or 17.2 percent of the river, where thewater quality is
classified as type Ⅲ, suitable for drinking; 4,280 km of the river
channel, or 34.1 percent of the river, where the water quality is
classified as type IV, only suitable for industry; 2,010 km of the river
channel, or 16.0 percent of the river, where the water quality is
classified as type V, only suitable for farming; 2,350 km of the river
channel, or 18.7 percent of the river, where the water quality is
classified lower than type V, the water body function basically lost.
In general, the length of the river with sufficient multi-function is
less than 1/3 of the total river length evaluated.
The discharge
of a large amount of sewage has caused the Yellow River being
overwhelmed. The sewage caused the extinction of one third of the wild
fish in the Yellow River and the long polluted section is even not
suitable for irrigation. The waterway is full of harmful toxins, about
50 percent of the Yellow River section can cause the death of organisms,
and have brought harm to the health of residents in the region. The
cases of cancer, birth defect and aquatic infectious diseases along the
river are increasing rapidly.
If we do not control the discharge
of polluted water into the river, the Yellow River will lose its
ability to shield us. The water of the Yellow River will become the
deadly poisonous water, causing disastrous consequences for the future
generations. We will drink the poisonous water brewed by ourselves and
come to a chronic suicide.
Ecological Degradation
The
origin of the Yellow River’s embarrassment starts from the source area,
Qinghai-Tibetan Plateau. With abundant underground water and glacier,
Qinghai-Tibetan Plateau is known as the Chinese “water tower” and nearly
50% of the Yellow River water comes from this area. But now, warming
and arid climate are threatening seriously the ecosystem of the upper
reaches of the Yellow River and have caused the unbalance of the
biological chain. As a result of this unbalance, rat disasters on the
grassland of the Plateau have caused degeneration of grass and then the
decline of fertility of the soil and its ability to conserve water. More
and more lakes are drying up; the water flowing into the Yellow River
has been decreasing gradually. therefore, how long the Yellow River can
survive without the source?
“I
lived in the Loess Plateau, winds from the slope scratched……”, this
song of “the Loess Plateau” make the people feel the heroic features of
the Loess Plateau, however, due to the biting wind and the sand,
numerous people lost their home. Affected by man-made and natural
factors, the environment degeneration of the regions along the upper and
middle reaches of the Yellow River is being accelerated. A lot of land
has been "covered" by deserts and the expansion of deserts has been
forming a dust bowl area, which is the source of sandstorms.
With
an area of 640,000 km2, the Loess Plateau is from the Riyue Mountain in
the west to the Taihang Mountain in the east, the south border is the
Qinling Mountain and the north border is Yin Mountain. It is an area in
China or even in the world with the most extensive soil erosion and the
weakest environment. Especially, the section from Hekouzhen to Tongguan,
which is classified as coarse sediment laden area, it is the main
source of the Yellow River sediment (more than 90%of the Yellow River
sediment comes from this area). In recent years, with degeneration of
ecological environment, the circumstance of the fragile Loess Plateau
has been getting worse, for instance, lots of lakes and rivers, which
supply water to the Yellow River, have been drying up, mass farmlands
have been becoming desert and soil erosion has been intensified. The
Loess Plateau is losing its “blood”.
If the Yellow River lacks
water incessantly, the environment balance of the Yellow River Delta
will be destroyed. As a result, the survival and multiplication of over
8000 species of aquatic organisms, over 100 species of wild plants and
over 180 species of birds will be threatened badly. If the Yellow River
lacks water incessantly, more sediment will gradually silt in the river
channel and meanwhile the less sediment will be brought to the Delta, as
a result, the seawater will erode the land and the Delta will shrink.
If the Yellow River lacks water incessantly, severe losses to
agriculture and industry of the Delta will be incurred,moreover,
drinking water will suffer from shortage, and then the local inhabitants
have to leave their home, even turbulence might be unavoidable.
Flood Risk
The
Yellow River is regarded as the most difficult river to be managed in
the world due to its particular features: it is easy to be silted up,
breached and be wandering. The lower reaches of the Yellow River from
Zhengzhou is known as a “hanging river” as the riverbed is generally 3~5
meters higher than the land surface protected by the riverbanks. For
instance, the riverbed is 20 meters higher than the land surface in
Xinxiang City, 13 meters higher in Kaifeng City and 5 meters higher in
Jinan City. The downstream channel has been silting up with constant
sediments, which are gathering on the main river bed. As a result, the
“secondary hanging river” has become a serious trouble to the Chinese
nation. If the Yellow River breached the dike and caused river channel
diversion, more than 1/3 administrative districts in China would suffer
from the big flood and the consequences would be disastrous.
Could
you remember this tragic history? In wishful thinking of stopping the
pursuing Japanese invaders, in 1938, the Kuomintang government ordered
to blow off the Yellow River dike at Huayuankou. As result, 890,000
people died, 12,500,000 people were uprooted, 44 counties in 3 provinces
of Henan, Anhui and Jiangsu were submerged and leaving a shocking world
“flood area by Yellow River”.
Until now, we still can not get
rid of the threat of big floods, although there is 150 years after the
catastrophic flood (36,000 m3/s) occurred in 1843. In terms of 150-year
cycle of floods and droughts of the Yellow River now the Yellow River is
entering the high water period and the catastrophic Yellow River
flooding is impending.
When will the severe flood happen? Nobody could foretell. Thus, it is still hanging over our heads, like the sword of Damocles.