Non-point source pollution caused by soil erosion during rainfall is an important hydrological and environmental safety issue, which has been widely concerned by scholars in the field of global ecological hydrology and environmental security protection. Recently, Hou Guirong, a postdoctoral fellow in the College of Forestry of Sichuan Agricultural University, published a research paper entitled “Suitable vegetation coverage and planting slope determined by soil and water conservation function-oriented determination can effectively prevent the spread of non-point source pollution- taking grassland as an example” in the top journal of environmental science and ecology, Ecotoxicology and Environmental Safety.
Taking high fescue grassland as an example, the transport rules of sediment, surface runoff and solute (TN, TP, COD, SS) during rainfall erosion are analyzed under the conditions of different rainfall intensity, vegetation coverage and planting slope, and the suitable vegetation coverage (≥84%) and planting slope (≤ 10°) can effectively prevent the spread of non-point source pollution guided by soil and water conservation function. The results of this study can provide a theoretical basis for the development of runoff purification system and the safety management of ecological environment.
Courtesy of Sichuan Agricultural University
The first unit to complete the paper was Sichuan Agricultural University, and the research was funded by the China Postdoctoral Science Foundation. (Source: China Science Daily, Zhang Qingdan, Han Qinglong)
Related paper information:https://doi.org/10.1016/j.ecoenv.2022.113804