The impact of global change on the water balance of large wetlands in the Elbe Lowland

Dietrich, Ottfried; Steidl, Jörg; Pavlik, Dirk

doi:10.1007/s10113-012-0286-5

Cited by 19 publications

(15 citation statements)

References 17 publications

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“…Within the lowland of the Elbe catchment, [11] identified 35 wetlands with respective areas between 1200 and 40,000 ha and mutual water regulation systems. It is conceivable that certain areas totaling 3840 km 2 are suitable for the intended application, or even more since small catchments (<1000 ha) were not included.…”

Section: Discussionmentioning

confidence: 99%

“…Costs are lower and stakeholder acceptance is higher during implementation compared to the introduction of new measures. In wetlands and the vicinity of streams, ditches have been constructed at many places in lowland catchments in order to improve soil water conditions for the agricultural use of these areas [10][11][12]. It seems worthwhile investigating whether ditch water management can be optimized in order to increase runoff in a stream during low flow in the mid-latitudes.…”

Section: Introductionmentioning

confidence: 99%

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Modeling the Impact of Ditch Water Level Management on Stream–Aquifer Interactions

Gliege

Thomas

Steidl

et al. 2016

Water

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Decreasing groundwater levels in many parts of Germany and decreasing low flows in Central Europe have created a need for adaptation measures to stabilize the water balance and to increase low flows. The objective of our study was to estimate the impact of ditch water level management on stream-aquifer interactions in small lowland catchments of the mid-latitudes. The water balance of a ditch-irrigated area and fluxes between the subsurface and the adjacent stream were modeled for three runoff recession periods using the Hydrus-2D software package. The results showed that the subsurface flow to the stream was closely related to the difference between the water level in the ditch system and the stream. Evapotranspiration during the growing season additionally reduced base flow. It was crucial to stop irrigation during a recession period to decrease water withdrawal from the stream and enhance the base flow by draining the irrigated area. Mean fluxes to the stream were between 0.04 and 0.64 ls´1 for the first 20 days of the low-flow periods. This only slightly increased the flow in the stream, whose mean was 57 ls´1 during the period with the lowest flows. Larger areas would be necessary to effectively increase flows in mesoscale catchments.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling the Impact of Ditch Water Level Management on Stream–Aquifer Interactions

Gliege

Thomas

Steidl

et al. 2016

Water

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“…This is a main reason different modules have been developed to use WBalMo in special applications. Dietrich et al [25] developed a module for the calculation of water demand in shallow water table sites in relation to actual site conditions; Koch and Voegele [33] estimate the demand for cooling water in power plants in relation to power plant technology. In the existing applications of WBalMo agricultural irrigation has only been examined using the actual permits farms received from water authorities in the past.…”

Section: The Wbalmo Water Management Modelmentioning

confidence: 99%

“…The deterministic simulation of the water use processes described above for large number stochastic simulated realisations and the registration of all relevant parameters enables a statistical evaluation of the results [34]. Such information can include hydrological parameters, yields or costs [25][26][27]33]. Figure 1.…”

Section: The Wbalmo Water Management Modelmentioning

confidence: 99%

“…They applied this module to investigate the effects of water scarcity at shallow water table sites in use for agriculture. Dietrich et al [25] investigated the impact of climate change on the Spreewald wetland water budget in scenario analyses; Grossmann and Dietrich [26,27] expanded and applied the WBalMo model to investigate the social and economic issues of a climate change scenario.…”

Section: Introductionmentioning

confidence: 99%

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Expansion of an Existing Water Management Model for the Analysis of Opportunities and Impacts of Agricultural Irrigation under Climate Change Conditions

Steidl

Schuler

Schubert

et al. 2015

Water

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Abstract:The impact of climate change and increased irrigation area on future hydrologic and agro-economic conditions was analysed for a representative basin in northeastern Germany using an expanded version of the WBalMO (water balance model) for water management. The model expansion represents various temporally and spatially differentiated irrigation water use processes, including agricultural irrigation, as part of a river basin's water management. We show that climate changes lead to increased irrigation water demands in the future, which will not always be able to be met. The resulting water deficits were shown for different crops depending on their irrigation priority and the water available. With an increased irrigation area, water deficits will rise. This may limit the profitability of agricultural irrigation. The impacts of climate change on low-flow conditions in the river are much higher than those of the increase in irrigated area alone. Therefore, any additional increases of irrigation will require careful monitoring of water availability to avoid critical impacts on river flows. The expanded model was able to replicate the processes of agricultural irrigation water use and can thus be used to test the impact of policies such as the certification of new irrigation permits. OPEN ACCESSWater 2015, 7 6352

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Impact of groundwater regimes on water balance components of a site with a shallow water table

Dietrich

Kaiser

2017

Ecohydrology

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The management of shallow water table sites is often the subject of discussion between different interest groups, the most controversial topic being the different target groundwater levels. A good level of knowledge about the effects of the different water levels on the water budget components is a precondition for the development of compromises in well‐balanced water resource management. We used groundwater lysimeters to investigate the impact of different water level regimes on the water balance. The lysimeters were installed directly within a typical shallow water table site and had a specially designed system to control the lower boundary condition. This enabled us to simulate different management options in a realistic way. Our results show increasing evapotranspiration with higher water levels but only if the vegetation is adapted to these conditions. Adaptation may take place within a few years of higher water levels. High water levels in spring are linked to increased water storage. This can help to compensate for the higher evapotranspiration for some weeks but not for the entire season. The meteorological conditions have a large short‐term impact on the water budget, which is difficult to compensate for using long‐term water management strategies or slow‐responding vegetation development. Our results underline the complex ecohydrological dependencies in such site conditions and could be an important basis for the development or improvement of ecohydrological models.

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The impact of global change on the water balance of large wetlands in the Elbe Lowland

Cited by 19 publications

References 17 publications

Modeling the Impact of Ditch Water Level Management on Stream–Aquifer Interactions

Modeling the Impact of Ditch Water Level Management on Stream–Aquifer Interactions

Expansion of an Existing Water Management Model for the Analysis of Opportunities and Impacts of Agricultural Irrigation under Climate Change Conditions

Impact of groundwater regimes on water balance components of a site with a shallow water table

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