Modeling the water demand on farms

Drastig, Katrin; Prochnow, Annette; Kraatz, Simone; Libra, Judy A.; Krauß, Michael; Döring, Karoline; Müller, Daniel; Hunstock, Uwe

doi:10.5194/adgeo-32-9-2012

Cited by 11 publications

(5 citation statements)

References 12 publications

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“…The rainfall interception calculation in the model is based on the study by von Hoyningen-Huene (1983) and Braden (1985). For a detailed description of the model, see Drastig et al (2012Drastig et al ( , 2013 and Prochnow et al (2012).…”

Section: Calculation Of Water Used For Feed Productionmentioning

confidence: 99%

Farm water productivity in broiler production: case studies in Brazil

Drastig

Palhares

Karbach

et al. 2016

Journal of Cleaner Production

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Section: Calculation Of Water Used For Feed Productionmentioning

confidence: 99%

Farm water productivity in broiler production: case studies in Brazil

Drastig

Palhares

Karbach

et al. 2016

Journal of Cleaner Production

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“…The modeling software AgroHyd Farmmodel [30] was used daily to calculate both the water flows and the water productivity over the entire vegetation period. Local weather data obtained from the DWD weather station (see Section 2.2.1), crop data, and crop water availability (crop water at field capacity (pF 2.0) minus crop water at permanent wilting point (pF 4.2)) in each plot were combined for detailed calculation of the local hydrologic processes in each plot, such as evaporation from soil (E), transpiration (T), evaporation of intercepted water (I), and percolation.…”

Section: Calculations 231 Hydrological Variablesmentioning

confidence: 99%

“…The rainfall interception calculation in the model is based on the studies by [32,33] taking the measured values of evaporation from interception [24]. A detailed description of the model is given in the work of [12,30].…”

Section: Calculations 231 Hydrological Variablesmentioning

confidence: 99%

Case Study of Effects of Mineral N Fertilization Amounts on Water Productivity in Rainfed Winter Rapeseed Cultivation on a Sandy Soil in Brandenburg (Germany) over Three Years

Drastig

Kreidenweis

Meyer‐Aurich

et al. 2021

Water

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Detailed knowledge about farm management practices and related hydrological processes on water productivity is required to substantially increase the productivity of precipitation water use in agriculture. With this in mind, the effect of the nitrogen (N) fertilization level on water productivity of winter oilseed rape (Brassica napus L.) was analyzed using a modeling approach and field measurements. In this first study of interception loss and water productivity in winter oilseed rape, the crop was cultivated in a field experiment on a sandy soil in Brandenburg (Germany) under five nitrogen fertilization treatments with 0, 60, 120, 180, and 240 kg mineral N ha−1 a−1. Based on data from three vegetation periods the water flows and the mass-based water productivity of seeds were calculated on a daily basis with the AgroHyd Farmmodel modeling software. As recommended from the recently developed guidelines of the FAO on water use in agriculture, the method water productivity was applied and uncertainties associated with the calculations were assessed. Economic profit-based water productivity (WPprofit) was calculated considering the costs of fertilization and the optimal level of N fertilization, which was determined based on a quadratic crop yield response function. Mean water productivity of seeds varied from 1.16 kg m−3 for the unfertilized control sample to 2.00 kg m−3 under the highest fertilization rate. N fertilization had a clearly positive effect on WPprofit. However, fertilizer application rates above 120 kg N ha−1 a−1 led to only marginal increases in yields. Water productivity of seeds under the highest fertilization rate was only insignificantly higher than under medium application rates. The optimum N level for the maximal WPprofit identified here was higher with 216 kg N ha−1 a−1. The conclusion is that further research is needed to investigate the interaction between fertilization and other farm management practices.

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“…Water consumed for animal feed production (Q indirect,Feed ) was calculated as actual evapotranspiration (ET) of the crops through the modeling software AgroHyd Farmmodel [20], which is based on the FAO's 56 dual crop coefficient method [44]. This method requires calculating (a) the reference evapotranspiration (ET0), (b) the potential crop transpiration (Tc), and (c) the actual transpiration (Tact) from the different datasets for climate, plants, and soil containing regional climate data, plant-specific parameters, and regional soil data.…”

Section: Calculation Of Water Productivitymentioning

confidence: 99%

The Effect of Best Crop Practices in the Pig and Poultry Production on Water Productivity in a Southern Brazilian Watershed

Carra

Palhares

Drastig

et al. 2020

Water

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This study analyzes the relation between Brazilian broiler and pig production and water productivity using recently developed reference guidelines on water footprinting for livestock production systems and supply chains. Different rainfed crop arrangements, in different scenarios and producer regions in Brazil, were assessed. Water productivity of broiler feed consumption ranged from 0.63 to 1.38 kg per m3 water input to rainfed summer maize (safra) and from 1.20 to 2.21 kg per m3 water input to winter maize (safrinha) while it ranged from 0.28 to 0.95 kg per m3 water input to rainfed soy. For pig feed consumption, rainfed maize ranged from 0.68 to 1.49 kg per m3 water input (safra) and from 1.30 to 2.38 kg per m3 water input (safrinha) while it ranged from 0.30 to 1.03 kg per m3 water input to rainfed soy. A potential amount of water saving of 0.0336 km3 year−1 and 0.0202 km3 year−1 could be attained for producing broiler and pig feed, respectively, depending on the crop rotation and producer region. The results showed that the evapotranspiration of animal feed production represents more than 99% of the total water consumption for broiler and pig production in the study area. The implementation of best crop practices resulted in higher water productivity values of chicken and pork meat and also improved the rainfall water-saving in comparison to conventional agriculture. Hence, the water productivity of the animal production chain in tropical regions demands a close relation to agriculture in order to attain a better understanding and improvement of rainfall water productivity for animal feed production.

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Modeling the water demand on farms

Cited by 11 publications

References 12 publications

Farm water productivity in broiler production: case studies in Brazil

Farm water productivity in broiler production: case studies in Brazil

Case Study of Effects of Mineral N Fertilization Amounts on Water Productivity in Rainfed Winter Rapeseed Cultivation on a Sandy Soil in Brandenburg (Germany) over Three Years

The Effect of Best Crop Practices in the Pig and Poultry Production on Water Productivity in a Southern Brazilian Watershed

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