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首页> 外文期刊>Environmental research >Modelling soil erosion in a Mediterranean watershed: Comparison between SWAT and AnnAGNPS models
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Modelling soil erosion in a Mediterranean watershed: Comparison between SWAT and AnnAGNPS models

机译：模拟地中海流域的土壤侵蚀：SWAT模型与AnnAGNPS模型之间的比较

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摘要

In this study, the simulations generated by two of the most widely used hydrological basin-scale models, the Annualized Agricultural Non-Point Source (AnnAGNPS) and the Soil and Water Assessment Tool (SWAT), were compared in a Mediterranean watershed, the Carapelle (Apulia, Southern Italy). Input data requirements, time and efforts needed for input preparation, strength and weakness points of each model, ease of use and limitations were evaluated in order to give information to users. Models were calibrated and validated at monthly time scale for hydrology and sediment load using a four year period of observations (streamflow and suspended sediment concentrations). In the driest year, the specific sediment load measured at the outlet was 0.89 t ha(-1) yr(-1), while the simulated values were 0.83 t ha(-1) yr(-1) and 1.99 t ha(-1) yr(-1) for SWAT and AnnAGNPS, respectively. In the wettest year, the specific measured sediment load was 7.45 t ha(-1) yr(-1), and the simulated values were 8.27 t ha(-1) yr(-1) and 6.23 t ha(-1) yr(-1) for SWAT and AnnAGNPS, respectively. Both models showed from fair to a very good correlation between observed and simulated streamflow and satisfactory for sediment load. Results showed that most of the basin is under moderate (1.4-10 t ha(-1) yr(-1)) and high-risk erosion ( 10 t ha(-1) yr-1). The sediment yield predicted by the SWAT and AnnAGNPS models were compared with estimates of soil erosion simulated by models for Europe (PESERA and RUSLE2015). The average gross erosion estimated by the RUSLE2015 model (12.5 t ha(-1) yr(-1)) resulted comparable with the average specific sediment yield estimated by SWAT (8.8 t ha(-1) yr(-1)) and AnnAGNPS (5.6 t ha(-1) yr(-1)), while it was found that the average soil erosion estimated by PESERA is lower than the other estimates (1.2 t ha(-1) yr(-1)).
机译：在这项研究中，在地中海流域Carapelle中比较了两种最广泛使用的水文流域尺度模型，年度农业面源（AnnAGNPS）和土壤和水评估工具（SWAT）生成的模拟结果。 （意大利南部普利亚）。评估了输入数据的要求，输入准备所需的时间和精力，每种模型的优缺点，易用性和局限性，以便为用户提供信息。使用四年的观测值（水流和悬浮泥沙浓度），按月尺度对水文和泥沙负荷进行了校准和验证。在最干旱的年份，出口处测量的特定泥沙负荷为0.89 t ha（-1）yr（-1），而模拟值为0.83 t ha（-1）yr（-1）和1.99 t ha（- 1）分别为SWAT和AnnAGNPS的yr（-1）。在最湿的一年中，特定的测得泥沙负荷为7.45 t ha（-1）yr（-1），模拟值为8.27 t ha（-1）yr（-1）和6.23 t ha（-1）yr （-1）分别用于SWAT和AnnAGNPS。两种模型都显示了观测到的和模拟的流量之间的合理相关性和很好的相关性，并且对泥沙负荷令人满意。结果表明，大多数盆地处于中等（1.4-10 t ha（-1）yr-1）和高风险侵蚀（> 10 t ha（-1）yr-1）之下。将SWAT和AnnAGNPS模型预测的沉积物产量与欧洲模型（PESERA和RUSLE2015）模拟的土壤侵蚀估算值进行了比较。 RUSLE2015模型估计的平均总侵蚀量（12.5 t ha（-1）yr（-1））可与SWAT（8.8 t ha（-1）yr（-1））和AnnAGNPS估计的平均比泥沙产量相当（5.6 t ha（-1）yr（-1）），而发现PESERA估算的平均土壤侵蚀低于其他估算值（1.2 t ha（-1）yr（-1））。

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