气候变化领域集成服务门户(CCPortal): High-resolution drought modeling in the case study of the Cuxhaven district in the North German Lowlands

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DOI	10.5675/HyWa_2024.2_2
	High-resolution drought modeling in the case study of the Cuxhaven district in the North German Lowlands
	Strom, Alexander; Kroecher, Jenny; Hannappel, Stephan; Wolke, Philipp; Fokuhl, Christian
发表日期	2024
ISSN	1439-1783
起始页码	68
结束页码	2
卷号	68 期号:2
英文摘要	More frequent and intense drought events underscore the necessity of tools for the public and for practitioners to describe the condition of the environmental compartments soil and water in the context of progressing climate change. Existing tools provide information at a mesoscale resolution of several kilometers, which does not allow for conclusions at the parcel level. In addition, no capillary rise from the groundwater into the effective root zone is taken into account at the mesoscale, further limiting the interpretability of soil moisture conditions in the groundwater -influenced areas of Northern Germany. In the present study, droughts were modelled separately for soils with and without groundwater connection in a spatially high resolution of 100 x 100 m2, incorporating the depth to groundwater in the Cuxhaven district. Within the district area, 41 % exhibit a connection of the effective root zone to the groundwater surface at average groundwater levels. During low groundwater levels, a decoupling from the groundwater surface occurs on 4 % of these areas, predominantly localized in depressions or at the margins of the geest areas. For soils without groundwater connection, modeling of the soil moisture and the drought condition was conducted from 1991 to June 2023 on a daily basis. The results illustrate the course of drought events at the parcel level and their implications on soil moisture conditions. Using the example of the drought in 2018, it was revealed that in peat soils with a high water storage capacity the drought condition sets in later, but lasts longer (9 to 10 months) compared to sandy soils on the geest areas with a low water storage capacity (4 to 6 months). On this basis, possible hazard parameters were derived with the aim of an area- and landuse-specific drought risk management. The maximum drought duration and the decoupling of the groundwater surface from the effective root zone at low groundwater levels have proven to be suitable parameters. The insights gained stimulate the discussion about new approaches in drought modeling. This includes incorporating the depth to groundwater into existing hydrological models for calculating soil water balance and establishing hazard and risk parameters with regard to future drought risk management at the scale of 100 x 100 m2 for the spatial resolution of parcels.
英文关键词	climate change; climate adaptation; drought; drought hazard; drought risk; German Drought Monitor; North German Lowlands; Lower Saxony; Cuxhaven
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:001207143200003
来源期刊	HYDROLOGIE UND WASSERBEWIRTSCHAFTUNG
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291629
作者单位	Leibniz Zentrum fur Agrarlandschaftsforschung (ZALF)
推荐引用方式 GB/T 7714	Strom, Alexander,Kroecher, Jenny,Hannappel, Stephan,et al. High-resolution drought modeling in the case study of the Cuxhaven district in the North German Lowlands[J],2024,68(2).
APA	Strom, Alexander,Kroecher, Jenny,Hannappel, Stephan,Wolke, Philipp,&Fokuhl, Christian.(2024).High-resolution drought modeling in the case study of the Cuxhaven district in the North German Lowlands.HYDROLOGIE UND WASSERBEWIRTSCHAFTUNG,68(2).
MLA	Strom, Alexander,et al."High-resolution drought modeling in the case study of the Cuxhaven district in the North German Lowlands".HYDROLOGIE UND WASSERBEWIRTSCHAFTUNG 68.2(2024).