Agricultural practices regulate the seasonality of groundwater-river nitrogen exchanges

Pinardi, Monica; Soana, Elisa; Severini, Edoardo; Racchetti, Erica; Celico, Fulvio; Bartoli, Marco

doi:10.1016/j.agwat.2022.107904

Cited by 9 publications

(2 citation statements)

References 70 publications

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“…Together with the measurement of the wet riverine surfaces where biogeochemical transformations can occur, the seasonal analysis of the land cover or of the distribution and activity of terrestrial primary producers, including cultivated plants, may help our understanding of the seasonal nutrient budget at the whole watershed level. Nutrient budgets are generally performed over an annual period and there is large uncertainty in the mechanisms linking seasonal nutrient genesis, transport, and transformations from the land to the water (Pinardi et al, 2022). As in modern agriculture, the vegetative period of crops is shorter and shorter, maps reporting the seasonal distribution of active vegetation and plowed soil can help understand the mechanisms leading to soil erosion and sediment transport to rivers, identifying therefore vulnerable areas to both diffuse dissolved and diffuse particulate river pollution.…”

Section: Soil System Budgets Crops and Riparian Buffersmentioning

confidence: 99%

Mapping Apennines river paths along different hydrological conditions from satellite images: A description of the method and potential applications

Giacomelli

Chelli

Bresciani

et al. 2023

River Research & Apps

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Climate change is producing large impacts on rivers, amplifying hydrological extremes. Prolonged drought periods result in dramatic stress for river biota and associated processes due to low discharge, reducing the interactions between rivers and their lateral environments or leading to hydrological intermittency. New quantitative methods are needed, to correlate discharge with the available riverine habitats. In this work we have mapped the wet surface and paths of two stretches of the Taro and Trebbia Apennine rivers, analyzing satellite images from periods with contrasting discharge. The considered stretches are critical due to different human pressures (large water withdrawals for agriculture and industrial use) and are particularly vulnerable to further, climate‐driven discharge reductions. The produced images offer multiple possibilities to extract qualitative and quantitative information at the whole stretch scales, including habitat reduction along with decreasing discharge, threshold discharge limiting lateral interactions, or the evaluation of longitudinal river continuity. We discuss the limitation and the potentialities of the method and the maps produced in terms of possible application in the field of river geomorphology, ecology, the definition of ecological river flow, risk assessment, and river management.

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Section: Soil System Budgets Crops and Riparian Buffersmentioning

confidence: 99%

Mapping Apennines river paths along different hydrological conditions from satellite images: A description of the method and potential applications

Giacomelli

Chelli

Bresciani

et al. 2023

River Research & Apps

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“…For the development of human, agriculture, and industry, rivers are vital sources of fresh water [10][11][12]. However, they are facing multiple threats including natural factors (precipitation, erosion, and weathering) and anthropogenic activities (agriculture, industry, and urban activities) [13][14][15][16][17][18][19]. Over the last century, river water quality has gradually changed as a result of human activities, especially for riverine nitrogen [14,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variation and Driving Factors of Nitrate in Rivers of Miyun Reservoir Watershed, North China

Qing-suo

Sun

et al. 2022

Water

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In order to identify the seasonal variations and dominant driving factors of NO3-N in rivers, investigations of five consecutive years were conducted in seven rivers of the Miyun Reservoir Watershed. Significant seasonal variation of NO3-N in rivers was separately found in the dormant season (non-growing season) and the growing season. Furtherly, the V-shaped, W-shaped, and indistinct seasonal patterns of NO3-N accounted for 53.0%, 38.7%, and 8.3%, respectively. They were remarkably affected by stream flow, and their significant quadratic function was discovered. The annual maxima and minima of NO3-N corresponded to medium flow in the dormant season and low flow or flood in the growing season, respectively. On one hand, flood mainly played a role in the diluent for the Chao River with high NO3-N, and on the other hand, it acted as a nitrogen source for the Bai River with low NO3-N. The NO3-N was closely correlated with human activities, and this correlation had obvious seasonal change trend. In the dormant season, significant and mostly extremely significant high correlation coefficient (R) values were determined, while partly non-significant with low R values were found in July, August, September, and October. Increasing seasonal variation index of NO3-N from upstream to downstream was found that was gentle for large rivers and sharp for small tributaries. The seasonality of NO3-N was more affected by natural factors, especially flood, than human factors.

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Irrigation practices affect relationship between reduced nitrogen fertilizer use and improvement of river and groundwater chemistry

Severini,

Magri,

Soana

et al. 2023

Agricultural Water Management

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Agricultural practices regulate the seasonality of groundwater-river nitrogen exchanges

Cited by 9 publications

References 70 publications

Mapping Apennines river paths along different hydrological conditions from satellite images: A description of the method and potential applications

Mapping Apennines river paths along different hydrological conditions from satellite images: A description of the method and potential applications

Seasonal Variation and Driving Factors of Nitrate in Rivers of Miyun Reservoir Watershed, North China

Irrigation practices affect relationship between reduced nitrogen fertilizer use and improvement of river and groundwater chemistry

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