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A comparison of two GIS-based watershed models in upstate New York

机译：南北纽约两种基于GIS的流域模型的比较

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Hydrological Simulation Program-Fortran (HSPF), a semi-distributed conceptual model, and the Soil Moisture Routing (SMR) model, a spatially distributed model, were applied to the Irondequoit Creek Watershed above Railroad Mills in central New York State over a seven-year simulation period. Besides differences in landscape representation, these models vary conceptually for surface runoff generation. HSPF-uses an infiltration excess mechanism, while SMR employs a saturation excess mechanism. There are also significant differences between the models for snowmelt and baseflow simulation. Fourteen evaluation periods representing a variety ofhydrologic conditions were used to compare model results. Surprisingly, both models predict streamflow almost equally well. HSPF predicted streamflow better for winter months due to its superior snowmelt routine, while SMR was more accurate during summer months as a result of its runoff and baseflow processes. The main difference between the models was in predicting spatially distributed moisture content. While HSPF aggregates this spatial information, SMR predictions of moisture content followed field observations reasonably well.
机译：水文仿真程序 - 福特兰（HSPF），半分布式概念模型和土壤湿度路由（SMR）模型，空间分布式模型应用于纽约市中心的铁路厂上方的Irondequoit Creek流域，超过七个年模拟期。除了景观表示的差异之外，这些模型概念性地变化了表面径流生成。 HSPF - 使用渗透过量机制，而SMR采用过量的多余机制。雪花和基础流模型之间也存在显着差异。代表多种水溶性条件的十四个评估期用于比较模型结果。令人惊讶的是，这两个模型都几乎同样地预测了流流。 HSPF由于其优越的雪花常规，冬季预测了STREEF流程，而SMR在夏季的径流和基础流程期间的夏季更准确。模型之间的主要区别在预测空间分布的水分含量。虽然HSPF聚集了这种空间信息，但水分含量的SMR预测是合理观察的。

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