ABSTRACT

This study presents a comparison of several interception modelling approaches and their impact on the simulation of discharge, soil moisture content and groundwater level using the Hydrologiska Byråns Vattenbalansavdelning (HBV)-light model. The study was based on 10-year measurements of interception loss in a mature Norway spruce forest. The interception modelled by the subtraction of the constant value from each individual rainfall event was proved to be the most efficient. The root mean square error (RMSE) between observed and simulated discharge increased by 5–6% compared to the reference model run, no differences in the soil moisture were observed and an increase in RMSE of 11% was observed concerning the groundwater level. The transpiration rate was overestimated by 3–5% on average. The study proved that even simple interception models can serve efficiently for hydrological modelling tasks focused on the simulation of particular water fluxes in forested catchments.

摘要

本研究比较了几种拦截建模方法及其对使用 Hydrologiska Byråns Vattenbalansavdelning (HBV)-light 模型的排放、土壤水分含量和地下水位模拟的影响。该研究基于对成熟的挪威云杉林中截获损失的 10 年测量结果。通过从每个单独的降雨事件中减去常数值来建模的拦截被证明是最有效的。与参考模型运行相比，观察到的和模拟的排放之间的均方根误差 (RMSE) 增加了 5-6%，没有观察到土壤水分的差异，并且观察到地下水位的 RMSE 增加了 11%。蒸腾速率平均高估了 3-5%。