River and Coastal Research Division, Korea Institute of Construction Technology, Goyang-Si, South Korea.
HDR|HydroQual, Mahwah, NJ, USA.
J Environ Manage. 2014 Apr 1;136:16-26. doi: 10.1016/j.jenvman.2014.01.033. Epub 2014 Feb 15.
A three-tiered approach was used to assess erosion risks within the Nakdong River Basin in South Korea and included: (1) a screening based on topography and land use; (2) a lumped parameter analysis using RUSLE; and (3) a detailed analysis using TREX, a fully distributed watershed model. These tiers span a range of spatial and temporal scales, with each tier providing increasing detail and resolution. The first two tiers were applied to the entire Nakdong River Basin and the Naesung Stream watershed was identified as having the highest soil erosion risk and potential for sedimentation problems. For the third tier, the TREX watershed model simulated runoff, channel flow, soil erosion, and stream sediment transport in the Naesung Stream watershed at very high resolution. TREX was calibrated for surface flows and sediment transport, and was used to simulate conditions for a large design storm. Highly erosive areas were identified along ridgelines in several headwater areas, with the northeast area of Songriwon having a particularly high erosion potential. Design storm simulations also indicated that sediment deposition of up to 55 cm could occur.
采用三层方法评估韩国南道那川流域的侵蚀风险，包括：（1）基于地形和土地利用的筛选；（2）使用 RUSLE 的集总参数分析；（3）使用 TREX（完全分布式流域模型）进行详细分析。这些层次跨越了不同的时空尺度，每个层次都提供了更详细和更高分辨率的信息。前两个层次应用于整个那川流域，并且 Naesung 溪流流域被确定为具有最高土壤侵蚀风险和潜在的泥沙淤积问题的地区。对于第三个层次，TREX 流域模型以非常高的分辨率模拟了 Naesung 溪流流域的径流量、河道流量、土壤侵蚀和河流泥沙输移。TREX 经过表面水流和泥沙输移的校准，并用于模拟大型设计暴雨的情况。在几个上游地区的山脊线上确定了高度侵蚀的区域，Songriwon 的东北区域具有特别高的侵蚀潜力。设计暴雨模拟还表明，可能会发生高达 55 厘米的泥沙沉积。
