Nghiên cứu ảnh hưởng của việc chuyển đổi rừng trồng sang rừng tự nhiên đến dòng chảy về các lưu vực sông, áp dụng cho lưu vực sông Cu Đê của thành phố Đà Nẵn

Abstract

In recent years, there is a growing situation in over-exploiting natural forests timber then reforesting with acacia, which is quite gaining popularity in the localities. This has negatively weakened the buffer surface at the river basins, in fact, it has been proven that this trend has increased the peak flow discharge as well as decreased the flow in the dry season. Consequently, floods and droughts are becoming severe. Therefore, it is necessary to conduct a study and scientific evaluation in terms of the influence of buffer surface factor (including area and quality of forests) on the flow, which is a crucial foundation for adjustment from authorities pertains to planning for effective and sustainable forest planting, exploitation, and management. This article will present mentioned above issues in detail, based on the application of the US model - WEAP to simulate the inflow process for the river basins of the city of Da Nang. The results show that the dry season flow has increased from 10.68% to 12.53% on average when converting 30% of artificial forest area to natural forest