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Modelling soil erosion and sediment transport under different land management options in a southern Italy watershed

机译:意大利南部流域不同土地管理方案下的土壤侵蚀和泥沙输送模型

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The aim of the study is to investigate the influence of different land management options on the sediment load at the watershed scale. To reach this aim the Annualized AGricultural Non Point Source (AnnAGNPS) model was used in the Candelaro basin (2300 km2). The watershed is located in a semi-arid area of southern Italy (Puglia region) and is affected by extensive erosion processes on the hillslopes. The sediment transport simulations have been compared with 15 years (1970-1984) data coming from measures taken in two sub-watersheds (Vulgano and Salsola). Afterwards the model has been applied for a period of 24 years (1985-2008) to evaluate the effects of different land management options on the sediment yield: traditional best management practices (BMPs), environmentally-targeted agricultural practices and water and soil conservation works. The results obtained in the first part of the work show that AnnAGNPS model performs well in simulating runoff and sediment yields at the watershed scale. Furthermore the analysis carried out shows that the model is an efficient tool to assess the influence of different management options in the long term and in different weather conditions.
机译:该研究的目的是调查流域尺度上不同土地管理方案对泥沙负荷的影响。为了实现这一目标,在坎德拉罗盆地(2300平方公里)使用了年度农业面源(AnnAGNPS)模型。该分水岭位于意大利南部(普利亚大区)的半干旱地区,受到山坡上广泛的侵蚀过程的影响。沉积物迁移模拟已经与15年(1970-1984年)的数据进行了比较,这些数据来自两个子流域(Vulgano和Salsola)的测量结果。之后,该模型已应用了24年(1985-2008年),以评估不同土地管理方案对沉积物产量的影响:传统的最佳管理实践(BMP),针对环境的农业实践以及水土保持工作。在工作的第一部分中获得的结果表明,AnnAGNPS模型在模拟流域尺度的径流和沉积物产量方面表现良好。此外,进行的分析表明,该模型是评估长期和不同天气条件下不同管理方案的影响的有效工具。

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