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The Minister of Natural Resources and Environment, Tran Hong Ha, explained and clarified a series of issues that interest the members of the National Assembly – Photo: Quochoi.vn
On the morning of November 5, Minister of Natural Resources and Environment (TN-MT) Tran Hong Ha delivered a speech explaining some issues that concerned delegates about the protection of natural forests, as well as assessing the causes of these cases. the heartbreaking of recent landslides, floods and floods in the central provinces.
Speaking with some comments that the cause of the landslides is due to small hydroelectric plants, Minister Tran Hong Ha said: “It is not due to small hydroelectric plants.”
According to Mr. Ha, the flaw in the development of small hydropower plants lies in the fact that benefits, design features, efficiency and technology have not been calculated. If we can design these works to be in harmony with nature, we will be able to maintain the source of energy and not make too natural changes.
“Of course there must be forest conversion assessments. We cannot stop changing our purpose if the current population increases by more than 100 million people, we do not have space for urban development, public space. intellectual property, “said Mr. Ha.
However, according to the Minister of Natural Resources and Environment, v.Forest conversion must take into account the benefits, that is, the need for functionally zoned areas that need to be conserved and protected. These are natural forests, for special use and protection.
Speaking in depth on landslides and floods, Minister Ha said of the year 2009, the Party and the State have directed the implementation of two research programs: the flood forecast program, flash floods in the mountainous provinces, the Central Highlands and the Central region and the geological hazards research program, warning of landslides. land in mountainous areas, as well as in the Central Highlands, Northwest and Central regions.
From the results of the research, a review of recent floods shows that landslides are caused by a combination of many types of natural disasters: Four storms, including Storm No. 9, the strongest in 20 years, landed very dangerous.
Along with this, the area of low pressures maintained for a long time in the central region generated rains that exceeded all historical indicators. There are days in Quang Nam with rainfall of up to 500mm / day and there are places during heavy rains where rainfall above 2,000-4,000mm is measured.
According to Mr. Ha, the target study data showed landslide areas such as Ranger Station 67 (Thua Thien Hue), Binh Doan 337 (Quang Binh), Tra Leng, Tra Van (South Tra My, Quang Nam) . … located at an altitude of 300-900m above sea level, concluding that the landslide caused by hydroelectricity is unfounded.
“We must not speculate, we must rely on science,” emphasized Mr. Ha and indicates that these areas are in the geological fault zone. These faults have friction to produce a 9-16 m weathering fracture, the level of weathering creating soil, sand, clay and gravel is very low.
These areas are also located on steep and mountainous terrain, the gravitational landslide and slope of rivers and streams are V-shaped, resulting in crushed rock. The addition of heavy rains increases the sliding gravity of the soil, causing landslides.
“It is also necessary to evaluate the forest and the natural vegetation related to the planted forest. In fact, the area where the legions are 100% covered, in the areas where people have long lived forest cover. the industry also reaches 60-80%, ”said Mr. Ha.
Reservoirs play an important role in regulating floods.
Speaking more about the role of the reservoir, Minister Tran Hong Ha said that with the recent operation of the regulating reservoirs in the central provinces, the role of flood reduction in downstream has been done well by 30-70%.
On the other hand, the Ministry of Natural Resources and Environment has issued 11 processes to regulate lakes in 11 hydrographic basins. In addition to the goal of power generation, these regulating lakes function to supply water during the dry season.
In particular, in extreme climatic conditions, the amount of water in rivers decreases by 80-90% in the dry season, these lakes have supplied 30-50% of the water. This role of the regulatory pond is irreplaceable.
Not because of the flood, but to pour it all into hydroelectricity
