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首页> 外文期刊>Allgemeine Forst und Jagdzeitung >Water balance dynamics of a mature beech and pine stand in the northeastern German lowlands (Brandenburg).
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Water balance dynamics of a mature beech and pine stand in the northeastern German lowlands (Brandenburg).

机译：德国东北低地（勃兰登堡）成熟的山毛榉和松树的水平衡动态。

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摘要

The water balance of a mature beech and pine stand was evaluated over a 6-yr period (1998-2003) at the intensive monitoring site at Neuglobsow located in the northeastern German lowlands. The water model Expert-N was used to predict water fluxes, i.e. transpiration, evaporation, soil water storage and groundwater recharge by two different model approaches based on the Richards equation and the capacity approach. Additionally, the results of the chloride balance could be compared with the modeled evapotranspiration and groundwater recharge. Annual observed throughfall amounted to 406 mm and was almost similar to predicted evapotranspiration of 396 and 406 mm a-1. The mean groundwater recharge was low and varied annually between 19 and 26 mm, whereas the chloride balance results in a groundwater recharge of 57 mm a-1 which was twice as high as model predictions. The results show the variance of water balance components, which is closely related to different model applications. On the other hand small differences of the two approaches, e.g. transpiration or evaporation, are confirming the modelled values. As a consequence, due to a recent climate change with decreased precipitations during vegetation time, trees with a lower water demand should be more considered in future silvicultural practice, especially at sites with deeper groundwater levels and low soil water capacities..
机译：在德国东北低地的Neuglobsow的密集监测点，对为期6年（1998-2003年）的成熟山毛榉和松树林的水平衡进行了评估。通过基于理查兹方程和容量法的两种不同的模型方法，使用水模型Expert-N预测水通量，即蒸腾量，蒸发量，土壤蓄水量和地下水补给量。此外，可以将氯平衡的结果与模拟的蒸散量和地下水补给量进行比较。年度观测到的穿透量总计为406毫米，几乎与预计的396和406毫米a-1的蒸散量相似。地下水的平均补给量很低，每年在19至26毫米之间变化，而氯化物的平衡导致地下水的补给量为57毫米a-1，是模型预测值的两倍。结果表明水平衡成分的变化，这与不同的模型应用密切相关。另一方面，两种方法的细微差异，例如蒸腾或蒸发，正在确认模型值。结果，由于最近的气候变化以及植被期间降水减少，因此，在未来的造林实践中，尤其是在地下水位较高且土壤水容量较低的地方，应更多考虑需水量较低的树木。

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