Long-term simulation of effects of energy crop cultivation on nitrogen leaching and surface water quality in Saxony/Germany

Gebel, Michael; Halbfass, Stefan; Bürger, Stephan; Lorz, Carsten

doi:10.1007/s10113-012-0330-5

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…For setup of the hydrological model we applied the WebGIS based software STOFFBILANZ [49][50][51]. The hydrological model aimed at providing estimates of groundwater recharge and surface water runoff rates for the model area and the AOI catchment [51][52][53][54].…”

Section: Validation Of the Rmb Results Using Hydrogeological And Hydrmentioning

confidence: 99%

Improved Approach for the Investigation of Submarine Groundwater Discharge by Means of Radon Mapping and Radon Mass Balancing

Schubert

Petermann

Stollberg

et al. 2019

Water

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The paper presents an improved approach for investigating submarine groundwater discharge (SGD) based on radon mapping and radon mass balancing in the coastal sea. While the use of radon as an environmental tracer in SGD studies is well-established, we identified based on our longstanding experience six methodical shortcomings of the conventional approach and suggest corresponding developments. The shortcomings include: (1 and 2) inadequate consideration of both detection equipment response delay and influence of tidal stage; (3 and 4) incorrect quantification of radon losses, due to offshore mixing and degassing resulting in a potentially incorrect radon mass balance; (5) inaccurate determination of the terrestrial groundwater endmember, due to inhomogeneous radon distribution in the coastal aquifer; and (6) difficulties in distinguishing between discharged fresh groundwater and recirculated seawater. The improved approach is practically demonstrated in a step by step manner in a large-scale field study, which was carried out in False Bay (South Africa) and which consisted of two parts, namely (i) qualitative SGD localization along the entire False Bay coastline based on coastal radon distribution patterns and (ii) quantitative SGD investigation within a defined coastal area of interest (AOI) based on a radon mass balance (RMB). The plausibility of the AOI related results was evaluated by a hydrogeological model, used for qualitative SGD localization, and a hydrological model, applied for estimating groundwater recharge within the AOI catchment.

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Section: Validation Of the Rmb Results Using Hydrogeological And Hydrmentioning

confidence: 99%

Improved Approach for the Investigation of Submarine Groundwater Discharge by Means of Radon Mapping and Radon Mass Balancing

Schubert

Petermann

Stollberg

et al. 2019

Water

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“…The web GIS-based software STOFFBI-LANZ (Gebel et al 2010(Gebel et al , 2012a(Gebel et al , 2012b was used to calculate runoff, sediment and nutrient input in the whole catchment area (variable grid size from 125 × 125 m up to 500 × 500 m), as well as in the subcatchment Sheyuchuan (fixed grid size of 50 × 50 m). The approach is suitable for modeling on regional scale and requires a minimum of parameters to run the model.…”

Section: Methodology and Technologymentioning

confidence: 99%

Web GIS-based simulation of water fluxes in the Miyun catchment area

Gebel¹,

Meißner²,

Halbfass³

et al. 2014

iForest

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Change of land use and agricultural management, combined with severe droughts during the last two decades, are the main reasons for a strong decrease of water quality and quantity in the Miyun reservoir (China). Due to semi-arid monsoon climate, episodic water fluxes have to be considered adequately in an integrated water resources management in the total catchment area. To get insight into runoff generation processes, sediment and nutrient source areas and transfer dynamics, a monitoring approach was established in the Miyun catchment area spanning from plot measurements with weighable gravitation lysimeters and in situ measurements to a subcatchment scale of approx. 10 km 2 . One of these subcatchments (Sheyuchuan) was selected to adapt the methodologies to the regional runoff pattern using the web GIS-based modeling tool STOFFBILANZ. Calibration of the daily runoff modeling is based on the lysimeter observations from Shixia station and runoff observations in Sheyuchuan subcatchment for the reference year 2011. Despite the fact that the climatic water balance in the region is negative, the precipitation event on 24 July 2011 with a rainfall of 107 mm caused a significant leachate at the lysimeter. The daily modeling for the lysimeter core by the FAO-ETc-adj approach showed a similar deep percolation and a similar distribution of evapotranspiration for the year considered. In the next step, the calibrated model was applied to the subcatchment Sheyuchuan to compare the results of direct runoff and groundwater runoff (deep percolation) with the runoff observations at the weir. Deep percolation was extremely small (1.7 mm yr -1 ), and direct runoff was 26.9 mm yr -1 in 2011. In comparison to the monitoring results at the weir, a disagreement in the quantity of runoff was found between the observation on the one hand and the simulation on the other hand, which can be explained by water storage in reservoirs for irrigation purposes. Additionally, the water fluxes in the total catchment area were simulated at meso-scale, obtaining a good correlation with observed values.Keywords: Bottom-up, Direct Runoff, Lysimeter, Meso-Scale, Miyun, Model, Percolation a grid with variable cell size (125 × 125 m up to 500 × 500 m; approx. 366 000 grid cells) by using a QUADTREE procedure (Fig. 1). Cropland as well as residential areas got the highest resolution in order to optimize the indication of critical source areas.The major part of the Miyun catchment area is mountainous with steep inclinations with elevation ranging from 60 to 2200 m a.s.l. Annual average precipitation in the sub-humid continental monsoon climate is lower than 500 mm yr -1 and occurs mainly in summer, whereas winter and spring are extremely dry (Chen et al. 2010). Precipitation increases from east to west, annual average temperature increases from south-east to north-west, ranging from 6.3 to 10.9 °C. Land cover is dominated by rocky mountain forest (54.8%) with a smooth transition to shrubbery, heath and dry grassland (31.5%). Cropland (10.7%) can be foun...

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“…This has important socio-political consequences on the use of new techniques (i.e., Participatory GIS) as tools for planning. Participatory, "bottom-up" geo-information technologies have been concurrently developing (Koschke et al 2014), and are expected to strengthen participatory spatial planning; important among these has been the transformation of conventional mapping and GIS tools into Participatory GIS (PGIS -Jankowski & Nyerges 2001, Fürst et al 2010b, 2012, Gebel et al 2012, Lorz et al 2013, Koschke et al 2014.…”

Section: Participation and Informationmentioning

confidence: 99%

Spatial information and participation in socio-ecological systems: experiences, tools and lessons learned for land-use planning

Rosa¹,

Lorz²,

König³

et al. 2014

iForest

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Long-term simulation of effects of energy crop cultivation on nitrogen leaching and surface water quality in Saxony/Germany

Cited by 10 publications

References 35 publications

Improved Approach for the Investigation of Submarine Groundwater Discharge by Means of Radon Mapping and Radon Mass Balancing

Improved Approach for the Investigation of Submarine Groundwater Discharge by Means of Radon Mapping and Radon Mass Balancing

Web GIS-based simulation of water fluxes in the Miyun catchment area

Spatial information and participation in socio-ecological systems: experiences, tools and lessons learned for land-use planning

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