20/7/2025–|Last update: 12:03 (Mecca time)
Detect study Hadith that the removal of forests seriously affects flood patterns and leads to troublesome and long -term consequences, as the rare flood that was happening once every 70 years is now repeated every 9 years.
The study, conducted by researchers at the University of British Columbia, confirmed that the removal of forests not only raises the rates of floods, but rather changes their entire behavior, so that rare events become frequent and unexpectedly peak.
The researchers studied two adjacent basins in North Carolina. Both were fully cut in the 1950s, but their response was completely different.
One of them kept, and its facing to the north was moisture and exposed to the sunlight to a lesser extent, while the other was facing the south, it dried more quickly.
“This study challenges this research traditional thinking about the influence of forest management on floods,” said lead author Dr. Younis Alila, the water scientist at the Faculty of Forestry at the University of Columbia.
“We hope that the industry and policy makers sector will take into account the results, which show that the issue is not only related to the amount of forests removed, but also to a place and how to remove them and the circumstances surrounding that,” he added.
For his part, Henry Fam, the first author of the study, said: “We found that the landscape factors that seem simple – such as the direction of the slope – can determine the success or failure of the response of (water ponds).”
According to the study, the frequency of floods in the northern basin (the subject of the study) increased between 4 times and 18 times, and the size of some floods exceeded weakness. On the other hand, no change in the southern basin was noticed. The researchers emphasized that the treatment itself resulted in radically various results, highlighting the role of trend and local climate in the flexibility of water basins.
The traditional models estimated the flow of water with a simple equation, cutting a certain percentage of trees resulting in an expected increase in water by a certain percentage, but the research team challenged this thinking, using a possibility based on data collected over 70 years of the hydrological kita laboratory.
The models revealed that the removal of forests not only raises the rates of floods, but rather changes their entire behavior, so that rare events become frequent and their peak is unexpectedly. Although water flows occur naturally, their size and frequency can change as a result of the use and management of lands (forests), or climate change.
The team follows the behavior of floods for decades after the removal of the forests, and revealed that the changes in the northern pelvis – the subject of the study – remained sharp for many years. It was not just a passing shock, but rather a deep and long -term shift in the hydrological response, even after 40 years of cutting trees, the floods remained more severe and longer.
Scientists believe that the reason is due to a permanent change in the way the soil maintains water, the water evaporated through the plants, and the extent of saturation of the earth after the rain.
Dr. Alila indicated that the results can apply to current and future flood disasters. British Columbia, for example, includes similar lands, including the areas invaded by floods in several European countries in 2021.
The researchers concluded that the large floods that also struck Texas in the United States of America between 2015 and 2023 intensified due to the changes of land and heavy rains resulting from climate change, and may have long been aggravated by forests.
The study stressed the need to review the forest policy that is not just water tanks, but rather systems that are complicated that are formed according to the patterns of slopes, soil and rain.
The results confirm that the understanding of the dynamics of these systems has become more important with climate change, and by dealing with water basins as live systems with unique characteristics, policy makers can make more intelligent and more observance decisions of the long -term consequences associated with climate change.