1 HYDROLOGY OF TIBET,CHINA 合作 求实 质量 创 新 Hydrology of Tibet, China Hydrology...
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Hydrology of Tibet, China
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Since 1952, the first of hydrologic station of Tibet was built in
Chamdo prefecture to now a perfect hydrologic station network has
been gradually established.
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discharge, water level, precipitation, evaporation, sedimentation,
water quality, groundwater, water temperature and ice run,
etc.
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Water environment monitoring:
From 1955, hydrology agency has carried out river water chemical
supervision basing on hydrological network, there are 32 water
quality monitor spots, 5000km of rivers under monitor, 300,000
square kilometers drainage area under control, 11 types of monitor
items and 73 parameters in Tibet.
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The real-time hydrological information processing is performed on
VAX or network system.
For key flood control area, such as Lhasa, Shigatse and Lhuntse,
various forecasting programs have been established to make on-line
flood forecasting. At present, there are two methods of flood
forecasting are often used in BHT as fellow:
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At 8 p.m of April 9th 2000,the highest peak of the Layonggabu Mount
collapsed suddenly .Millions of cubic meters of landslide materials
fell with quantities of energy and scared mountains on both sides
of the Gully. In several minutes, the materials passed 8km with a
drop of 3300 meters.
The huge accumulation body of about 300 million cubic meters
blocked up Yigong Tsangpo River. Seven kilometers of the river
course and road were stuffed and covered.
In the process of disaster-relief and rescue, Tibet Hydrology
Bureau sent 26 persons headed by Gong Tongliang to go to the
disaster areas. When they arrived, they established six survey
stations and a hydro-info network centered by Tongmai. In the
period of their stay, they provided many valuable analysis reports
to the headquarters. At midnight of June 10th , the water smashed
the embankment of Yigong Lake and the discharge of the flood
reached to 124,000 cubic meters per second. And the water level of
Palung Tsangpo rose for 50 meters.
Yigong disaster-relief and rescue