Flooding – soil storage WH2050

Description

This map shows the available storage in the soil (mm) in climate scenario WH2050 and at an average high groundwater level (GHG). Precipitation intensity is expected to increase further until 2050. This applies to both summers and winters. In areas with high water levels and groundwater levels and a low infiltration capacity (mm/hour), a rain shower generally causes first flooding in these areas. In areas with lower water levels and groundwater levels and a high infiltration capacity, water nuisance will generally be less likely due to the rapid infiltration of water into the soil and the availability of more soil storage. Soil storage on the map can be used even better in times of (extreme) rainfall, so that flooding can be avoided elsewhere. This map provides an initial insight into the spatial distribution of the available soil storage, based on the calculated highest groundwater level with the National Water Model (NWM) in climate scenario WH2050. The highest groundwater level is usually reached in the winter months. (See also the map GHG WH2050 in the Climate Atlas). Because the average groundwater level is calculated, it is the ‘worst-case’ available soil storage, where the groundwater levels are high. This map aims to get a first picture of vulnerable and promising areas for soil storage, as input for integrated climate sessions. In order to quantify the severity and extent of the bottlenecks and to develop opportunities, further detail is needed. This is particularly true for urban areas. Construction The map shows per grid cell of 0.5 by 0.5 meters what the available soil storage is in millimetres. The map was created by combining a height map, the Average High groundwater map (GHG WH2050) and soil type. Accountability GHG WH2050: Average highest groundwater level for climate scenario WH2050 of the National Water Model (www.helpdeskwater.nl). Height map AHN3 with a resolution of 0.5x0.5m (www.ahn.nl). CAPSIM table. The CAPSIM table shows how many millimetres of water (vertical) can be recovered per soil type, depending on a given soil type. Bottom-type map BOFEK2012. This map shows the spatial distribution of soil physical units developed by Wageningen University. Soil types in the urban area are missing from this rural map. To get a flat-cover image, the urban area has been closely interpolated with the nearest soil species. (https://www.wur.nl/nl/show/Bodemfysische-Eenhedenkaart-BOFEK2012.htm) Disclaimer In this map, additional information is generated based on refined visualised results of the National Water Model, soil types and infiltration capacities. This provides a refined image with a resolution of 0.5 by 0.5 meters. However, the calculation result is still based on the NWM with resolution of 250 by 250 meters. For urban areas, the soil type map has been interpolated because there are no urban area data in the BOFEK2012 map. The consequence of this is that the map in particular for the urban area is less reliable and is advised to look in more detail.

Resources

Name Format Description Link
0 https://geodata.zuid-holland.nl/geoserver/klimaat/wms?service=WMS&version=1.3.0&request=GetCapabilities

Tags

  • klimaatatlas
  • wateroverlast
  • bodemberging

Topics

  • ENVI

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