Cooling Laos wind

Using short-term summer rice varieties, building reservoirs in the direction of Laos wind . according to scientists is a good method to cool the heat in the Central.

This is the result of many years of rigorous research of the Center for harsh materials and environments (HIMTECH - Institute of Mechanics). Associate Prof. Dr. Nguyen Viet Cuong, Director of the Center said, the study also proposed many specific measures to take advantage of the energy of Laos wind, develop tourist spots in Nghe An and Laos.

Reduce heat by short-term rice

Opening the road to Muong Luong tourist site.Photo: Character provided.

The study of Laos wind cooling has been carried out by HIMTECH scientists since 1992. Talking about the nature of the hot and dry of Laos wind, Assoc. Prof. Dr. Cuong said, Laos wind is actually Southwest wind. When encountering an obstacle with high altitude, the Southwest wind will pour out all humidity in Laos, when going to Vietnam, it will increase the temperature due to going through bare hills and rocky mountains. Lao wind usually occurs from April to September, peak in July. The temperature is usually 37 to 38 degrees Celsius, sometimes up to 42 degrees C. These winds make the summer climate in the North Central Vietnam becomes harsh.

According to Assoc.Prof.Dr. Cuong, measures to build lakes and measures to plant trees are necessary but if only individual measures are not effective. On the basis of world studies on the efficiency of heat absorption through three-leaf layers and especially the effect of summer-autumn rice (with a growth period coinciding with the Lao wind period from April to September), the Center scientists have chosen breakthrough measures to strongly develop the area of ​​short-term summer-autumn rice cultivation (from 90 to 105 days) while increasing humidity, absorbing heat during the Lao wind days.

The effect will be highest when mature summer-autumn rice has three layers of leaves, capable of absorbing over 90% of solar energy in the days of Laos wind. Increasing humidity also means that the climate is less hot and harsh. With the development of nearly 56,000 hectares of rice, the number of days of Lao wind has decreased by 2/3 (from 30 days to 10 days).

Create vacation spots on 'desert'

Along with the method of planting summer-autumn rice, Assoc. Prof. Dr. Cuong and the research team also proposed measures to increase the area of ​​water, forest and solar cells to absorb heat.

Also from HIMTECH's proposal, from 2005 to now, Nghe An province has surveyed and built nearly 40 water reservoirs of all kinds. At the same time, it approved two projects to apply Lao wind mitigation technology at Thanh Thuy border gate (Thanh Chuong district) and Muong Tong (Ky Son district).

According to Assoc. Prof. Cuong, Thanh Thuy has a height of nearly 1,000m, a moderate climate. When constructing about five reservoirs along the Ro River in the direction of Laos wind, the wind passing through this territory will bring steam through Thanh Chuong, Nam Dan, Hung Nguyen, Nghi Loc and TP districts. Vinh. Besides, lakes made from high to low should be used for hydroelectricity and reservoirs for agriculture.

Muong Cage also has a height of more than 1,700m with good air and water source, very suitable for a tourist area. Currently, the province has completed nearly 200km of road to tourist areas.

'Tourism project in Thanh Thuy, Muong Cage not only helps to develop the economy of these localities but also changes the climate of Nghe An province' , Assoc. Dr. Cuong emphasized.

In the coming time, HIMTEC will coordinate with Nghe An authorities and the government of Blykhhamxay (Laos) to build about 10 reservoirs, increase forest area, create tourist destinations for neighboring areas of Laos. This is a measure to minimize Lao wind right above Laos and help Laos to develop tourism.