GroMoPo Metadata for Dusseldorf SPRING model

The application of the groundwater flow model SPRING to the city of Dusseldorf, Germany (217 km(2)) as part of a larger hydrological catchment area (708 km(2)) required developing a new, robust calculation scheme (RUBINFLUX) for groundwater recharge with a high spatial and temporal resolution. RUBINFLUX combines a novel approach for drainage from the unsaturated zone with proven hydrological components. The drainage is calculated as a natural exponential function using the difference between the actual storage and the water storage at field capacity without making use of the Richards equation. The simulated groundwater recharge values at each element of the groundwater mesh were used as the upper boundary condition. After transient calibration of the groundwater flow model against 871 observation wells, the transient variations of the groundwater levels at locations not influenced by river levels were accurately simulated. The integration of RUBINFLUX into SPRING has proved suitable for complex hydrological systems.

将地下水流模型SPRING应用于德国杜塞尔多夫市（面积217 km²），该区域作为总面积708 km²的更大水文流域的组成部分，需开发一套全新且鲁棒性强的高时空分辨率地下水补给计算方案RUBINFLUX。RUBINFLUX将非饱和带排水的创新方法与经实践验证的水文组分相结合，其排水过程通过自然指数函数计算，以实际储水量与田间持水量下的储水量之差作为计算依据，无需借助理查兹方程（Richards equation）。地下水流网格各单元的模拟地下水补给量被用作该模型的上边界条件。基于871口观测井的实测数据对地下水流模型开展瞬态校准后，未受河流水位影响区域的地下水位瞬态变化得到了精准模拟。将RUBINFLUX集成至SPRING模型的方案，已被证明适用于复杂水文系统。