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- Title
植被恢复改变黄土高原产流模式问题初探.
- Authors
穆兴民; 顾朝军; 孙文义; 赵广举; 高 鹏; 王双银
- Abstract
Effective vegetation restoration has strongly altered the soil hydrological properties on the Loess Plateau and then affected the surface runoff generation pattern. This has become a new issue related to the attribution analysis of the change of runoff and sediment load in the Yellow River. Given a short period, the geology and geomorphology of the catchment are relatively stable, and the surface runoff generation pattern can be expressed as a function of rainfall and underlying surface. Vegetation restoration can increase canopy interception and surface roughness. With the increase of vegetation restoration time, soil bulk density decreases, soil porosity and water stability aggregate content, soil water holding capacity and infiltration capacity can be increased and may alter runoff generation greatly. It was found that the runoff generation regime had changed from Horton model(excessive infiltration) to mixed or Dunne model(saturated runoff) in some re-vegetated catchments. The main reasons for the changes in runoff generation regime were the increase of soil infiltration capacity, water storage capacity and regulation capacity caused by vegetation restoration. We proposed that the research about effects of vegetation restoration on soil micro-structure, soil hydrological properties and runoff generation pattern should be strengthened in the future.
- Publication
Yellow River, 2019, Vol 41, Issue 10, p33
- ISSN
1000-1379
- Publication type
Article
- DOI
10.3969/j.issn.1000-1379.2019.10.007