川北紫色土区典型小流域径流特征分析

针对日益加剧的四川紫色土地区水土流失情况,选取四川省南部县鹤鸣观小流域为研究区,对其径流特征进行探讨分析。结果表明,该流域径流季节变化与年际变化都较大,降雨量与径流量、土壤侵蚀模数与径流之间相关性与流域水土保持措施的实施与否关系密切,水保措施起到了很好的减水减沙效果。本研究为该区水资源合理利用与川北紫色土区流域水土流失机理分析以及区域水土保持治理提供了一定的科学依据。

Analysis of the Characteristics of Runoff in Typical Watershed of the Purple Soil Region in North Sichuan

According to the aggravation status of water loss and soil erosion in the purple soil region,the authors took Hemingguan watershed of Nanbu county in Sichuan province as study region and investigated the watershed runoff characteristic of the watershed.The result showed that the seasonal and annual variation of the runoff was lavge.The correlation between the runoff volume and the rainfall or the soil erosion module and the runoff volume was effected by the implementation of the water and soil conservation measures.The water and soil conservation measures played an important role in reducing water and sediment.The research can offer the evaluation for rational using water resources,analyzing the mechanics of soil and water loss and regional soil and water conservation.