Soil map of Lower Saxony 1: 50 000 — Local relocation potential (exchange frequency) 2021-2050 Climate protection scenario (RCP2.6)

The map shows the average local relocation potential for non-absorbable substances (including exchange frequency of soil water per year) for the 30-year period 2021-2050 under the “climate protection” scenario (RCP2.6). With the help of the exchange frequency (AH) of soil water, the local relocation potential for non- or weakly absorbable substances can be described. The AH indicates how often the soil solution is exchanged in the effective root zone in the course of leachate displacement. The lower the water storage and retention capacity of a soil, the greater its frequency of exchange of soil water. Statements on the concentration and cargo of non-sorbable substances cannot be mapped with the method. For nitrate, deposition, denitrification and mineralisation are not taken into account. Depending on the location, they can have a significant impact on nitrate availability and concentration in leachate. The climate models are driven by the “climate protection” scenario (RCP2.6). This is a scenario of the IPCC, which means significant efforts in climate protection and low emissions. The results of all climate models are equally likely. Therefore, in addition to the mean, which shows a tendency, the upper (maximum) and lower (minimum) edge of the result bandwidth can be retrieved via the maptip.本地图展示了"气候保护"情景（RCP2.6）下，2021-2050年这30年间，非可吸收性物质（含土壤水年交换频次）的局地迁移潜力平均值。 借助土壤水交换频次（AH），可表征非或弱可吸收性物质的局地迁移潜力。AH指标反映了渗流驱替过程中，有效根区内土壤溶液的交换频次。土壤的储水与持水能力越低，其土壤水交换频次越高。 该方法无法表征非可吸收性物质的浓度与载荷相关信息。针对硝酸盐而言，其沉积、反硝化与矿化过程均未被纳入考量；而在不同区位条件下，这些过程会对渗滤液中硝酸盐的有效性与浓度产生显著影响。 本研究所用的气候模式由"气候保护"情景（RCP2.6）驱动。该情景系政府间气候变化专门委员会（IPCC）提出的减排情景，意味着需在气候保护领域付出显著努力并实现低排放水平。 所有气候模式的模拟结果权重均等。因此，除可体现趋势的平均值外，用户还可通过地图提示（maptip）获取结果带宽的上限（最大值）与下限（最小值）边界。