| 刊名 | Journal of Landscape Research |
| 作者 | WANG Hao, XIAO Shizhen |
| 作者单位 | School of Karst Science, Guizhou Normal University/State Engineering Technology Institute for Karst Desertification Control, Guiyang, Guizhou 550001, China |
| DOI | DOI:10.16785/j.issn 1943-989x.2024.2.016 |
| 年份 | 2024 |
| 刊期 | 2 |
| 页码 | 72-76 |
| 关键词 | Source-sink landscape theory, Non-point source pollution, Ecological restoration, Rocky desertification control, Karst basin |
| 摘要 | The growth of society and population has led to a range of water pollution issues. Among these, non-point source pollution assessment and treatment pose a particular challenge due to its formation mechanism. This has become a focal point and challenge in water pollution treatment research. The study area for this research was the Huanghou basin in Guizhou Province, southwest China. The land use type of the basin was analyzed using remote sensing technology, and water quality data was collected by distributing points throughout the basin, based on source-sink landscape theory. The distribution map of the basin’s source-sink landscape and the results of water quality data accurately and efficiently identified the areas with high risk of non-point source pollution in the western and southwestern residential and agricultural areas of the upper basin. Hence, a strategy of “increasing sinks and decreasing sources” was proposed. The strategy was implemented at both macro and micro levels to address non-point source pollution in the basin using ecological remediation techniques. The work to control karst rocky desertification should continue at a macro level. The rocky desertification area in the basin should gradually transform into grassland and forested land, while increasing the overall area of the sink landscape. Ecological restoration techniques, such as slope planting, riparian zone vegetation restoration, increasing plant abundance, and restoring aquatic plants, can effectively control non-point source pollution at the micro level. Compared to traditional control methods, this remediation strategy focuses on source and process control. It is more effective and does not require large-scale water pollution control projects, which can save a lot of environmental control funds and management costs. Therefore, it has greater research significance and application value. |
