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Youen Grusson
Dept. of Soil and Environment, Swedish University of Agricultural Sciences (SLU), PO Box 7014, SE-750 07 Uppsala, Sweden

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Journal article
Published: 21 March 2021 in Agricultural Water Management
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Over 90% of Swedish agriculture is rainfed, and thus future climate change can pose a risk to agricultural production in coming decades. An overall increase in annual precipitation is predicted for northern Europe, but Sweden could still face an increasing need for irrigation, as shown by the drought summer of 2018. Adaptation of Swedish agriculture to include irrigated agriculture should thus be considered. To evaluate the theoretical need for irrigation, calculations were performed for different locations in Sweden, and for different soil-crop pairs at each location. In-situ weather data from a projected climate dataset created by the Swedish Meteorological and Hydrological Institute were used to evaluate changes in irrigation need over the period 1981–2050. The results showed an increasing need for irrigation of cereal crops during the early season (May–June), for two main reasons: i) A shift to an earlier start of the cropping period, leading to an earlier need for irrigation; and ii) a higher probability of dry spring weather, substantially increasing the irrigation requirement in dry years. Crops for which the growing season starts later (e.g., potatoes) showed an increasing need for irrigation during July. Crop development stages were predicted to occur earlier, leading to earlier harvesting, reducing the irrigation requirement in August. However, the calculation approach developed for this study may have underestimated the need for irrigation, which could be higher than reported here.

ACS Style

Youen Grusson; Ingrid Wesström; Abraham Joel. Impact of climate change on Swedish agriculture: Growing season rain deficit and irrigation need. Agricultural Water Management 2021, 251, 106858 .

AMA Style

Youen Grusson, Ingrid Wesström, Abraham Joel. Impact of climate change on Swedish agriculture: Growing season rain deficit and irrigation need. Agricultural Water Management. 2021; 251 ():106858.

Chicago/Turabian Style

Youen Grusson; Ingrid Wesström; Abraham Joel. 2021. "Impact of climate change on Swedish agriculture: Growing season rain deficit and irrigation need." Agricultural Water Management 251, no. : 106858.

Journal article
Published: 16 February 2021 in Agricultural Water Management
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Future climate change is predicted to increase precipitation volume in Sweden, and also to modify precipitation patterns and produce more intense rainfall events. This study examined the impact of such changes in three small Swedish watersheds dominated by agricultural land. The Soil and Water Assessment Tool (SWAT) was used to investigate the relationship between changes in precipitation (monthly and daily) and monthly water partitioning between runoff, soil water content, and evapotranspiration. A climate ensemble produced from Representative Concentration Pathway (RCP) scenarios 4.5 and 8.5 and five different global climate models, regionalized by the Swedish regional climate model RCA4, was used to feed the SWAT model. The results showed similar outcomes for the three sites, with an increase in total monthly precipitation often associated with an increase in high daily rainfall events. Increased intensity of rainfall, particularly events > 15 mm/day, was associated with an increase in runoff, but not in soil water content. In the few cases where monthly precipitation decreased, soil water content also decreased. The main impact on all hydrological components of the system appeared to be more significant during the middle of the cropping season (May–August) than at the beginning (April) or end (September). These conclusions emerge despite the climate model ensemble underestimating the heaviest daily rainfall events. Overall, this study showed that the projected increasing trend in seasonal rainfall in southern Sweden would not result in more soil water being available for crop production.

ACS Style

Youen Grusson; Ingrid Wesström; Elina Svedberg; Abraham Joel. Influence of climate change on water partitioning in agricultural watersheds: Examples from Sweden. Agricultural Water Management 2021, 249, 106766 .

AMA Style

Youen Grusson, Ingrid Wesström, Elina Svedberg, Abraham Joel. Influence of climate change on water partitioning in agricultural watersheds: Examples from Sweden. Agricultural Water Management. 2021; 249 ():106766.

Chicago/Turabian Style

Youen Grusson; Ingrid Wesström; Elina Svedberg; Abraham Joel. 2021. "Influence of climate change on water partitioning in agricultural watersheds: Examples from Sweden." Agricultural Water Management 249, no. : 106766.

Preprint content
Published: 10 March 2020
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Catchments of European mountains are essential because of their role to provide water to human society. Mountainous area regulate water flux through a complex system of storage and release, playing the role of water tower. Better understand the dynamic functioning of this system at the scale of each compartment and the relationships between the storage and releasing processes are important to understand the impact induced by climate change. In particular, the disappearance of snow during the winter will potentially modify the low flow water level and ecological flow in late spring and early summer, impacting the ecological services provided by e.g. ponds, peat or wetland. The presented study aims to identify the keys factors and their current role in this hydrological system of the Pyrenean Mountains, and identify critical hydrological conditions that will potentially impact the socio-ecological services related to water resources. This goal has been achieved by a development of a high resolution hydrological modeling framework at the scale of the entire Pyrenean massif, together with the study of lower scale representative systems (peatland) and the development of specific future climate scenarios, in order to suggest mitigation actions and adaptability action through water management.

ACS Style

Youen Grusson; Manon Dalibard; Mélanie Raimonet; Sabine Sauvage; Gaël Leroux; Santiago Begueria; Leticia Palazon; José Miguel Sánchez Pérez. Better understand mountain hydrology to enhance climate change impact assessment. 2020, 1 .

AMA Style

Youen Grusson, Manon Dalibard, Mélanie Raimonet, Sabine Sauvage, Gaël Leroux, Santiago Begueria, Leticia Palazon, José Miguel Sánchez Pérez. Better understand mountain hydrology to enhance climate change impact assessment. . 2020; ():1.

Chicago/Turabian Style

Youen Grusson; Manon Dalibard; Mélanie Raimonet; Sabine Sauvage; Gaël Leroux; Santiago Begueria; Leticia Palazon; José Miguel Sánchez Pérez. 2020. "Better understand mountain hydrology to enhance climate change impact assessment." , no. : 1.

Journal article
Published: 30 December 2019 in Water
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Modeling is a useful way to understand human and climate change impacts on the water resources of agricultural watersheds. Calibration and validation methodologies are crucial in forecasting assessments. This study explores the best calibration methodology depending on the level of hydrological alteration due to human-derived stressors. The Soil and Water Assessment Tool (SWAT) model is used to evaluate hydrology in South-West Europe in a context of intensive agriculture and water scarcity. The Index of Hydrological Alteration (IHA) is calculated using discharge observation data. A comparison of two SWAT calibration methodologies are done; a conventional calibration (CC) based on recorded in-stream water quality and quantity and an additional calibration (AC) adding crop managements practices. Even if the water quality and quantity trends are similar between CC and AC, water balance, irrigation and crop yields are different. In the context of rainfall decrease, water yield decreases in both CC and AC, while crop productions present opposite trends (+33% in CC and −31% in AC). Hydrological performance between CC and AC is correlated to IHA: When the level of IHA is under 80%, AC methodology is necessary. The combination of both calibrations appears essential to better constrain the model and to forecast the impact of climate change or anthropogenic influences on water resources.

ACS Style

Roxelane Cakir; Mélanie Raimonet; Sabine Sauvage; Javier Paredes-Arquiola; Youen Grusson; Laure Roset; Maite Meaurio; Enrique Navarro; Miguel Sevilla Callejo; Juan Luis Lechuga-Crespo; Juan Jesús Gomiz Pascual; Jose María Bodoque; José Miguel Sánchez-Pérez. Hydrological Alteration Index as an Indicator of the Calibration Complexity of Water Quantity and Quality Modeling in the Context of Global Change. Water 2019, 12, 115 .

AMA Style

Roxelane Cakir, Mélanie Raimonet, Sabine Sauvage, Javier Paredes-Arquiola, Youen Grusson, Laure Roset, Maite Meaurio, Enrique Navarro, Miguel Sevilla Callejo, Juan Luis Lechuga-Crespo, Juan Jesús Gomiz Pascual, Jose María Bodoque, José Miguel Sánchez-Pérez. Hydrological Alteration Index as an Indicator of the Calibration Complexity of Water Quantity and Quality Modeling in the Context of Global Change. Water. 2019; 12 (1):115.

Chicago/Turabian Style

Roxelane Cakir; Mélanie Raimonet; Sabine Sauvage; Javier Paredes-Arquiola; Youen Grusson; Laure Roset; Maite Meaurio; Enrique Navarro; Miguel Sevilla Callejo; Juan Luis Lechuga-Crespo; Juan Jesús Gomiz Pascual; Jose María Bodoque; José Miguel Sánchez-Pérez. 2019. "Hydrological Alteration Index as an Indicator of the Calibration Complexity of Water Quantity and Quality Modeling in the Context of Global Change." Water 12, no. 1: 115.

Journal article
Published: 17 December 2018 in Water
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Climate change is suspected to impact water circulation within the hydrological cycle at catchment scale. A SWAT model approach to assess the evolution of the many hydrological components of the Garonne catchment (Southern France) is deployed in this study. Performance over the calibration period (2000–2010) are satisfactory, with Nash–Sutcliffe ranging from 0.55 to 0.94 or R2 from 0.86 to 0.98. Similar performance values are obtained in validation (1962–2000). Water cycle is first analyzed based on past observed climatic data (1962–2010) to understand its variations and geographical spread. Comparison is then conducted against the different trends obtained from a climate ensemble over 2010–2050. Results show a strong impact on green water, such as a reduction of the soil water content (SWC) and a substantial increase in evapotranspiration (ET) in winter. In summer, however, some part of the watershed faces lower ET fluxes because of a lack of SWC to answer the evapotranspiratory demand, highlighting possible future deficits of green water stocks. Blue water fluxes are found significantly decreasing during summer, when in winter, discharge in the higher part of the watershed is found increasing because of a lower snow stock associated to an increase of liquid precipitation, benefiting surface runoff.

ACS Style

Youen Grusson; François Anctil; Sabine Sauvage; José Miguel Sánchez Pérez. Coevolution of Hydrological Cycle Components under Climate Change: The Case of the Garonne River in France. Water 2018, 10, 1870 .

AMA Style

Youen Grusson, François Anctil, Sabine Sauvage, José Miguel Sánchez Pérez. Coevolution of Hydrological Cycle Components under Climate Change: The Case of the Garonne River in France. Water. 2018; 10 (12):1870.

Chicago/Turabian Style

Youen Grusson; François Anctil; Sabine Sauvage; José Miguel Sánchez Pérez. 2018. "Coevolution of Hydrological Cycle Components under Climate Change: The Case of the Garonne River in France." Water 10, no. 12: 1870.

Journal article
Published: 23 April 2018 in Water
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Numerous studies have pointed out the importance of groundwater and surface water interaction (SW–GW) in a river system. However; those functions have rarely been considered in large scale hydrological models. The SWAT-LUD model has been developed based on the Soil and Water Assessment Tool (SWAT) model; and it integrates a new type of subbasin; which is called subbasin-LU (SL); to represent the floodplain area. New modules representing SW–GW exchanges and shallow aquifer denitrification are developed in the SWAT-LUD model. In this study; the SWAT-LUD model was applied to the middle floodplain area of the Garonne catchment in France. The results showed that the SWAT-LUD model could represent the SW–GW exchange and shallow aquifer denitrification appropriately. An annual 44.1 × 107 m3 of water flowed into the river from the study area; but the annual exchanged water volume was 6.4 × 107 m3; which represented just 1% of the river discharge. A total of 384 tons of N-NO3− (0.023 t·ha−1) was consumed by denitrification in the floodplain shallow aquifer annually. The nitrate concentration (N-NO3−) decrease in the channel was 0.12 mg·L−1; but in the shallow aquifer it reached 11.40 mg·L−1; 8.05 mg·L−1; and 5.41 mg·L−1 in LU1; LU2; and LU3; respectively. Our study reveals that; in the Garonne floodplain; denitrification plays a significant role in the attenuation of nitrate associated with groundwater; but the impacts of denitrification on nitrate associated with river water is much less significant.

ACS Style

Xiaoling Sun; Léonard Bernard-Jannin; Youen Grusson; Sabine Sauvage; Jeffrey Arnold; Raghavan Srinivasan; José Miguel Sánchez Pérez. Using SWAT-LUD Model to Estimate the Influence of Water Exchange and Shallow Aquifer Denitrification on Water and Nitrate Flux. Water 2018, 10, 528 .

AMA Style

Xiaoling Sun, Léonard Bernard-Jannin, Youen Grusson, Sabine Sauvage, Jeffrey Arnold, Raghavan Srinivasan, José Miguel Sánchez Pérez. Using SWAT-LUD Model to Estimate the Influence of Water Exchange and Shallow Aquifer Denitrification on Water and Nitrate Flux. Water. 2018; 10 (4):528.

Chicago/Turabian Style

Xiaoling Sun; Léonard Bernard-Jannin; Youen Grusson; Sabine Sauvage; Jeffrey Arnold; Raghavan Srinivasan; José Miguel Sánchez Pérez. 2018. "Using SWAT-LUD Model to Estimate the Influence of Water Exchange and Shallow Aquifer Denitrification on Water and Nitrate Flux." Water 10, no. 4: 528.