Showing posts with label level. Show all posts
Showing posts with label level. Show all posts

Saturday, December 11, 2010

HCM City development stymied by chaotic waterway management

HCM CITY — Overlaps in authority and irrational regulations mean HCM City's inland waterways are badly managed, affecting the very development of the city, officials have said.

The city has nearly 1,000km of rivers and canals, most of which function as water transport routes and are classified as national-level and city-level routes.

There are 16 national-level routes measuring more than 250km managed by the Viet Nam Inland Waterway Administration.

The city Department of Transport manages 87 city-level routes with a total length of 570km.

The administration manages boat lanes and ports and wharves on the national routes.

However, the areas between the boat lanes and banks are not managed by any agency.

This causes administrative problems related to a clutch of other issues like underwater works, urban order and security, sanitation, urban architecture, housing, illegal encroachment of rivers and canals, and landslides.

Along the banks of rivers and canals managed by the administration, thousands of illegal houses have mushroomed.

For example, along the Kenh Te – Kenh Doi Canal, hundreds of houses have been illegally built in districts 4, 7 and 8, severely affecting the safety of waterway traffic and sanitation.

Ngo Dinh Quang, director of the City Inland Waterway Port Authority, said: "If there are violations, we can only issue warnings and cannot penalise offenders because we lack the authority to do so."

To better manage the national-level routes, the city People's Committee recommended to the Ministry of Transport in August to restructure their management by handing over the authority to the city.

This would help simultaneously manage several issues like waterway traffic safety, ports, wharves, water supply and drainage, sanitation, dredging, and building embankments along rivers and canals, it said. — VNS

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Saturday, November 20, 2010

Floods threaten central provinces, again

No sooner had they recovered after the floods earlier this month, the central provinces are coping with heavy rains, with floods already slamming into several areas, threatening Ha Tinh, Quang Binh, Quang Tri and Thua Thien - Hue.
In Ha Tinh, flash floods occured in Huong Son district, leaving one dead and more than 1,500 houses flooded. Heavy rains and steep hills have triggered floods, according to Nguyen Duy Trinh, chairman of Huong Son district.
The district currently has more than 410 ha of rice and 1,200 ha of maize, which were left after the recent floods, now submerged in flood waters.
In Quang Binh, heavy rains cause by a cold wave, appeared on Thursday and Friday. In Tan Hoa commune, the area which has experienced the recent history flooding, heavy rains have raised water levels in rivers and streams by 0.5 meters.
Nguyen Ngoc Giai, director of Quang Binh Bureau of Dyke and Flood Prevention, said it is forecast water may rise to alert levels, especially in big river as Kien Giang, Gianh and Nhat Le, from now until next Wednesday.
In Quang Tri, heavy rains accompanied by strong winds on Thursday raised water levels in many rivers in mountainous districts such as Dakrong and Huong Hoa. Heavy downpours also occurred in the lowlands.
Water level on the Ben Hai River in Gia Voong is 42 cm more then the normal level. Heavy rains have been non-stop as of Friday evening.
In Thua Thien - Hue, a tornado left one dead, four students and a teacher seriously injured, and dozens of houses damaged in Ha Long village, Phong My commune.
The village is now being isolated, and only boats can travel there. The village’s population is mainly ethnic minorities, with 83 households of about 300 people.
"The roof of my house was blown up, and dozens of kilograms of stored rice are now totally wet," Ho Thi Dao, a Pa Hy ethnic woman, said in tears.
The tornado killed Tran Ngoc Me, an 80-year-old resident whose house was completely collapsed.
In Quang Binh, the Ho Chi Minh City Road section that goes through the districts of Tuyen Hoa, Quang Ninh and Le Thuy was severely eroded.
The road that goes through Truong Son commune was half eroded, causing traffic jams. According to the 483 Limited Company, which is repairing damaged roads, there are more than 98 landslide-affected spots in the 45-km road section that goes through the two districts of Quang Ninh and Le Thuy.
Another section of the Ho Chi Minh Road is badly eroded in A Dot - A Tep, the area from A Luoi district of Thua Thien - Hue province to Tay Giang district of Quang Nam province.
A storm is approaching the East Sea
On Friday, international meteorological forecast centers warned that a powerful storm called Megi which formed on the northwestern part of the Pacific Ocean is approaching the East Sea.
Typhoon Megi was moving west-northwest at 17 kilometers per hour and is forecast to reach Luzon, the Philippines’ most populous island, within four days.
The storm’s maximum sustained winds were blowing at 167 kph and may strengthen to 250 kph as it approaches the northern part of Luzon, the centers said.
That would make it a Category 5 storm, the strongest, on the Saffir-Simpson Hurricane Wind scale and capable of “catastrophic damage,” according to the US National Hurricane Center.
Waves in the vicinity of the storm’s eye were 6.7 meters (22 feet) high.
Megi is the name of a catfish in South Korea and is related to the feeling of getting wet, according to the Hong Kong Observatory, which lists names assigned to storms in the northwest Pacific.
According to the Central Hydrometeorology Forecast Center, heavy rains occurred over the last two days in the central provinces from Nghe An to Quang Nam, with the average rainfall of 100-150mm, and 150-200mm in the provinces from Ha Tinh to Quang Nam.
Currently the waters in Kien Giang, Vu Gia, and Gianh rivers are on alarming levels.
It is forecast flood waters in Quang Binh and Thua Thien - Hue rivers may rise to alert level 3; in Ha Tinh, Quang Tri and Quang Nam alert level 2; and in Ca River in Nghe An alert level 1.

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Saturday, October 16, 2010

Power cuts loom as water levels at reservoirs decrease sharply

Water levels in many reservoirs have declined sharply compared to previous years, leading to possible electricity shortages.

Hoa Binh Reservoir, the biggest in the north, was at its lowest level for two decades.

The current water level stands at 99m, much lower than the reservoir's 117m capacity.

About 24.5 billion cubic meters of water flowed into the reservoir this year, 18.3 cubic meters less than the same period in previous years.

The National Hydro-meteorological Forecast Center warned that the total amount of water flowing into the reservoir during the remaining quarter of this year would reach 9.4 billion cubic meters.

The reservoir's water level is estimated to decrease by 22.5 billion cubic meters by the year's end.

This year's severe drought was to blame for the problem, said Hoa Binh hydroelectric plant director Nguyen Van Thanh.

There has been one small downpour this year. In the past, there were between five and eight, he said.

"Over the past 23 years of operation, this is the first time the plant hasn't had to open the sluice gate," Thanh said.

Other reservoirs also face the same problem, with many of their water levels reaching ‘death level' where turbines cease to safely function.

Son La Reservoir water level stands at 162m, 13m lower than the death level.

The water levels of Dai Ninh Reservoir in central Quang Nam Province, Ham Thuan Reservoir in central Binh Thuan Province and Tri An Reservoir in southern Dong Nai Province stand at just 0.2 m, 0.1m and 0.13m higher than death level, respectively.

Meanwhile, the monsoon season was set to end, worsening the water shortage situation, said deputy director of the center Nguyen Lan Chau.

"Rains are forecast in the next few months, however the expected 20-30mm of rainfall will not be enough to make up for the water shortages," she said.

Low water levels may lead to electricity shortages.

CEO of the Electricity of Vietnam (EVN) Dao Van Hung said the company's electricity supply would be 5-10 per cent lower than demand as a result of the droughts.

The Hoa Binh hydropower plant annually generated more than 10 billion kWh and this year intended to generate 8.5 billion kWh but the target might be decreased due to water shortages, he said.

The plant generated 42 million kWh per day in 2009, but the figure had dropped to 32 million kWh a day this year.

The plant's director Thanh said electricity generation was limited due to water shortages while the Hoa Binh Reservoir had to start to reserve water for electricity generation during the approaching dry season.

The low water level at the Hoa Binh Reservoir would affect the construction of Turbine No 2 at the Son La hydropower plant, meaning that the power's electricity generation would slow, according to EVN deputy director general Vu Duc Thin.

The water level needed to measure 113m to be able to transport the equipment, but the present level was 99m, he said.

All 17 key EVN reservoirs faced water shortages while hydroelectricity accounted for 6,500MW of the company's total electricity generation capacity of 16,000-17,000MW, causing difficulties for electricity generation which would continue well into next year, CEO Hung said.

The company planned to propose the Ministry of Industry and Trade to map out plans to avoid rolling power cuts, he said.

"Cement and steel production plants, which consume large amounts of electricity, will be required to change their production plans to save electricity," he said.

Other power sources such as thermo-electricity would be maximized to help make up for the electricity shortages, he added.

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