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首页> 外文期刊>Journal of the American Water Resources Association >MODELING NUTRIENT EXPORT FROM COASTAL CALIFORNIA WATERSHEDS
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MODELING NUTRIENT EXPORT FROM COASTAL CALIFORNIA WATERSHEDS

机译：沿海加州流域养分出口模型

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摘要

Nitrate and phosphate export coefficient models were developed for coastal watersheds along the Santa Barbara Channel in central California. One approach was based on measurements of nutrient fluxes in streams from specific land use classes and included a watershed response function that scaled export up or down depending on antecedent moisture conditions. The second approach for nutrient export coefficient modeling used anthropogenic nutrient loading for land use classes and atmospheric nutrient deposition to model export. In an application of the first approach to one watershed, the nitrate and phosphate models were within 20% of measured values for most storms. When applied to another year, both nitrate and phosphate models generally performed adequately with annual, storm-flow, and base-flow values within 20% of measured nutrient loadings. Less satisfactory results were found when applied to neighboring watersheds with difference percentages of land use and hydrologic conditions. Application of the second approach was less successful than the first approach.
机译：为加州中部圣塔芭芭拉海峡沿岸的流域开发了硝酸盐和磷酸盐出口系数模型。一种方法是基于对特定土地利用类别中溪流中养分通量的测量，并包括分水岭响应函数，该函数根据先前的湿度条件向上或向下缩放出口。养分出口系数建模的第二种方法是使用人为养分的土地用途类别和大气养分沉积来模拟出口。在第一个方法对一个流域的应用中，大多数风暴的硝酸盐和磷酸盐模型都在测量值的20％以内。当应用到另一年时，硝酸盐和磷酸盐模型通常在年营养值，暴雨流量和基本流量值均不超过所测养分含量的20％之内，即可正常运行。当应用于土地使用和水文状况百分比不同的邻近流域时，发现的结果不太令人满意。第二种方法的应用没有第一种方法成功。

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