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首页> 外文期刊>Transactions of the ASABE >Validating soil phosphorus routines in the SWAT model. (Special Issue: Soil and water assessment tool (SWAT) modeling technology: current status.)
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Validating soil phosphorus routines in the SWAT model. (Special Issue: Soil and water assessment tool (SWAT) modeling technology: current status.)

机译：在SWAT模型中验证土壤磷常规。 （特刊：水土评估工具（SWAT）建模技术：当前状态。）

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Phosphorus transfer from agricultural soils to surface waters is an important environmental issue. Commonly used models like SWAT have not always been updated to reflect current understanding of soil P transformations and transfer to runoff. The objective of this study was to validate the ability of routines in both SWAT2000 and SWAT2005 to initialize the quantity of P in different soil P pools (and thus soil total P) and simulate changes in the simulated solution P pool. Based on data from 40 published studies, results show that currently published equations to estimate the soil PSP parameter and SWAT's method of summing four soil P pools underpredict soil total P. An underprediction of soil total could result in underprediction of P loss in runoff with eroded sediment. Conversely, the proposed alternative for estimating soil total P, which includes a new equation to estimate the soil PSP parameter and includes the solution P pool when summing soil P pools, resulted in accurate predictions of soil total P for 484 topsoil samples from 35 published studies. Results also show that both the SWAT routines and the routines proposed by a previous study for simulating changes in soil P were able to accurately predict long-term changes in soil solution P. However, routines in both SWAT2000 and SWAT2005 may underpredict solution P for several weeks after P is added to soils. This could result in underprediction of dissolved inorganic P loss in runoff soon after a P application to soils. The routines proposed by the previous study would not result in similar underpredictions.
机译：磷从农业土壤转移到地表水是一个重要的环境问题。诸如SWAT之类的常用模型并未总是得到更新，以反映当前对土壤P转化和转化为径流的理解。这项研究的目的是验证SWAT2000和SWAT2005中的例程能够初始化不同土壤P池中P的数量（以及土壤总P）并模拟模拟溶液P池中的变化的能力。根据来自40项已发表研究的数据，结果表明，目前发表的估算土壤PSP参数的方程式和SWAT对四个土壤P池求和的方法低估了土壤总P。土壤总量的低估可能会导致径流过程中P损失的低估沉淀。相反，用于估算土壤总磷的建议替代方案包括一个新的方程式，用于估算土壤PSP参数，并且在对土壤P池求和时包括溶液P池，从而可以从35个已发表的研究中准确预测484个表层土的土壤总P。 。结果还表明，SWAT例程和先前研究中提出的用于模拟土壤P变化的例程都能够准确预测土壤溶液P的长期变化。但是，SWAT2000和SWAT2005中的例程可能会低估几个将磷添加到土壤中几周后。在土壤中施用磷后不久，可能会导致径流中溶解的无机磷损失的低估。先前研究提出的程序不会导致类似的预测不足。

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