Runoff Generation and Soil Erosion at Different Age of Acacia Plantation in Hoa Binh Province, Vietnam

• Main Authors: Kolyan, Chin, Bui, Xuan Dung, Nguyen, Thi My Linh, Ravor, Seng
• Format: Article
• Language: English
• Published: H. : ĐHQGHN 2019
• Subjects: Acacia plantation forest; Runoff generation; Soil erosion; Vegetation cover
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/67559; https://doi.org/10.25073/2588-1094/vnuees.4353
• Institution: Vietnam National University, Hanoi

To determine the characteristics of runoff generation and soil erosion at the different ages of Acacia plantation in Luong Son headwater of Vietnam, four plots (15m2 plot-1) were set up. Of those, two plots were at up-hill and down-hill in 1-year-old and two plots in 5-years-old Acacia plantation. Soil erosion and runoff were monitored during rainy season from April to September 2018. The main finding includes: (1) Runoff coefficient at Acacia 1-year-old down and up was ranged from 0.36% - 0.46% with the average 0.41%. Acacia 5-years-old, down and up was 0.35% - 0.39%, averaged 0.37%. It shows the slightly different between the locations of two years due to the different ground cover but not statistical significant different; (2). Soil erosion in Acacia-1 and Acacia-5 year old were 21.84 and 14.20 ton/ha/6months, respectively. The data for soil erosion was statistical significant different between two ages of Acacia plantation. Soil erosion at the study site was very high within strong erosion base on TCVN5299: 2009; (3) Both runoff and soil erosion had strong relationship with precipitation (R2 range from 0.52-0.85, with P-value = 0.00). This result suggests that more concerning and applying suitable management for reducing the negative impact of Acacia plantation at the headwater of Vietnam is necessary