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首页> 外文期刊>Journal of Hydrology: Regional Studies >Determination of spatially differentiated water balance components including groundwater recharge on the Federal State level – A case study using the mGROWA model in North Rhine-Westphalia (Germany)
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Determination of spatially differentiated water balance components including groundwater recharge on the Federal State level – A case study using the mGROWA model in North Rhine-Westphalia (Germany)

机译：确定空间差异化的水平衡成分，包括联邦州一级的地下水补给量–以北莱茵-威斯特法伦州的mGROWA模型为例（德国）

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Highlights ? We introduce a model for highly resolved simulations of water balance quantities. ? Soil moisture dynamics is simulated using a multi-layer soil water balance module. ? The model has been successfully applied on the Federal State level in Germany. ? The groundwater recharge map is used in regional water resources management. ? Groundwater withdrawals in NRW do not exceed groundwater recharge in large areas. Abstract Study region: The Federal State of North Rhine-Westphalia (NRW), Germany. Study focus: On behalf of the Federal State Agency for Nature, Environment and Consumer Protection of North Rhine-Westphalia, Germany (LANUV) the mGROWA model is applied, in order to simulate the water balance components actual evapotranspiration, total runoff, direct runoff and groundwater recharge at Federal State level. mGROWA-simulations were performed in daily time steps for the hydrological reference period 1971–2000 and in a spatial resolution of 100 by 100 m. mGROWA results for groundwater recharge and State-wide recorded groundwater withdrawal rates have been used to assess the extent of groundwater exploitation in NRW. New hydrological insights: Simulated groundwater recharge levels are presented as long-term annual averages and as long-term monthly values in order to indicate the seasonal fluctuation of groundwater recharge rates. Quantitative statistics indicate that mGROWA enables the simulation of total runoff and groundwater recharge without significant tendency of over- or underestimation. Against this background mGROWA simulation results are used by LANUV to support regional water resources management, e.g. for determining the status of groundwater exploitation in NRW. The majority of groundwater bodies in NRW are at present not at risk of unsustainable groundwater usage. A small number of groundwater bodies along the river Rhine, however, have been assessed as being close to unsustainable groundwater exploitation.
机译：强调 ？我们介绍了用于高度平衡的水平衡模拟的模型。 ？使用多层土壤水分平衡模块模拟土壤水分动力学。 ？该模型已成功应用于德国联邦州一级。 ？地下水补给图用于区域水资源管理。 ？北威州的地下水抽取量不超过大面积的地下水补给量。摘要研究地区：德国北莱茵-威斯特法伦州（NRW）。研究重点：代表德国北莱茵-威斯特法伦州联邦自然，环境与消费者保护局（LANUV），应用mGROWA模型，以模拟水平衡组成部分的实际蒸散量，总径流量，直接径流量和联邦州一级的地下水补给。 mGROWA模拟是在1971-2000年水文参考期的每日时间步长中进行的，其空间分辨率为100 x 100 m。 mGROWA的地下水补给结果和全州记录的地下水取水率已用于评估北威州的地下水开采程度。新的水文见解：模拟的地下水补给量以长期年平均值和长期每月值的形式给出，以表明地下水补给率的季节性波动。定量统计表明，mGROWA能够模拟总径流量和地下水补给，而没有明显的高估或低估趋势。在这种背景下，LANUV使用mGROWA模拟结果来支持区域水资源管理，例如：确定北威州的地下水开采状况。目前，北威州的大多数地下水体都没有不可持续使用地下水的风险。然而，莱茵河沿岸的少量地下水体已被评估为接近不可持续的地下水开采。

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