A Modeling Approach to Determining the Relationship Between Erosion and Soil Productivity

Williams, J. R.; Jones, Christopher A.; Dyke, P. T.

doi:10.13031/2013.32748

Cited by 956 publications

(446 citation statements)

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“…Biogeochemical processes of the nitrogen cycle in each HRU are modeled by the ErosionProductivity Impact Calculator (EPIC) model (Williams et al 1984) by coupling hydrologic processes in SWAT. The coupled model monitors N biogeochemical processes (nitrification, denitrification, mineralization) as inputs or outputs to five soil N pools (NH 4 + , NO 3 − , active organic N, stable organic N, and fresh organic N by plant residue), as well as plant uptake and anthropogenic fertilizer.…”

Section: Soil and Water Assessment Tool (Swat)mentioning

confidence: 99%

Modelling potential impacts of climate change on water and nitrate export from a mid-sized, semiarid watershed in the US Southwest

Grimm

2013

Climatic Change

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The impacts of climate change on water and nitrogen cycles in arid central Arizona (USA) were investigated by integrating the Second Generation Coupled Global Climate Model (CGCM2) and a widely used, physical process-based model, Soil and Water Assessment Tool (SWAT). With statistically downscaled daily climate data from the CGCM2 as model input, SWAT predicted increased potential evapotranspiration and decreased surface runoff, lateral flow, soil water, and groundwater recharge, which suggests serious consequences for the water cycle in this desert catchment in the future. Specifically, stream discharge is projected to decrease by 31 % in the 2020s, 47 % in the 2050s, and 56 % in the 2080s compared to the mean discharge for the base period (0.73 m 3 /s). A flowduration analysis reveals that the projected reduction of stream discharge in the future is attributable to significant decreases in mid-range and low-flow conditions; however, flood peaks would show a slight increase in the future. The drier and hotter future also will decrease the rate of nitrogen mineralization in the catchment and ultimately, nitrate export from the stream. Since mean mineralization rate would decrease by 15 % in the 2020s, 28 % in the 2050s, and 35 % in the 2080s compared to the based period (9.3 g N ha −1 d −1 ), the combined impact of reduced catchment mineralization and reduced streamflow would predict declining nitrate export: from today's mean value of 30 kg N/d, to 20, 15 and 12 kg N/d by the 2020s, 2050s, and 2080s, respectively.

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Section: Soil and Water Assessment Tool (Swat)mentioning

confidence: 99%

Modelling potential impacts of climate change on water and nitrate export from a mid-sized, semiarid watershed in the US Southwest

Grimm

2013

Climatic Change

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“…2) was developed on the basis of the EPIC model (Williams et al, 1984). The EPIC model is a field scale model made up of several sub-routines dealing respectively with climate, hydrology, crop growth, tillage, erosion, nutrients cycles, pesticide movement, soil temperature, crop management and economical aspects.…”

Section: Epicgrid Hydrological Modelmentioning

confidence: 99%

Hydrological response to climate change in the Lesse and the Vesdre catchments: contribution of a physically based model (Wallonia, Belgium)

Bauwens

Sohier

Degré³

2011

Hydrol. Earth Syst. Sci.

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Abstract. The Meuse is an important rain-fed river in NorthWestern Europe. Nine million people live in its catchment, split over five countries. Projected changes in precipitation and temperature characteristics due to climate change would have a significant impact on the Meuse River and its tributaries. In this study, we focused on the impacts of climate change on the hydrology of two sub-catchments of the Meuse in Belgium, the Lesse and the Vesdre, placing the emphasis on the water-soil-plant continuum in order to highlight the effects of climate change on plant growth, and water uptake on the hydrology of two sub-catchments. These effects were studied using two climate scenarios and a physically based distributed model, which reflects the water-soil-plant continuum. Our results show that the vegetation will evapotranspirate between 10 and 17 % less at the end of the century because of water scarcity in summer, even if the root development is better under climate change conditions. In the low scenario, the mean minimal 7 days discharge value could decrease between 19 and 24 % for a two year return period, and between 20 and 35 % for a fifty year return period. It will lead to rare but severe drought in rivers, with potentially huge consequences on water quality.

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“…It was developed by the USDA-ARS Grassland, Soil and Water Research Laboratory, in Temple, Texas, USA (Arnold et al, 1998). SWAT was assembled by the combination of other models, like Simulator for Water in Rural Basins (SWRRB) (Arnold et al, 1990), Routing Outputs to Outlet (ROTO) (Arnold;Williams;Maidment, 1995), Chemicals, Runoff and Erosion from Agricultural Management Systems (CREAMS) (Knisel, 1980), Groundwater Loading Effects on Agricultural Management Systems (GLEAMS) (Leonard et al, 1987) and Erosion-Productivity Impact Calculator (EPIC) (Williams;Jones;Dyke, 1984).…”

Section: Soil and Water Assessment Tool (Swat)mentioning

confidence: 99%

Agricultural watershed modeling: a review for hydrology and soil erosion processes

et al. 2016

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Models have been used by man for thousands of years to control his environment in a favorable way to better human living conditions. The use of hydrologic models has been a widely effective tool in order to support decision makers dealing with watersheds related to several economic and social activities, like public water supply, energy generation, and water availability for agriculture, among others. The purpose of this review is to briefly discuss some models on soil and water movement on landscapes (RUSLE, WEPP, GeoWEPP, LASH, DHSVM and AnnAGNPS) to provide information about them to help and serve in a proper manner in order to discuss particular problems related to hydrology and soil erosion processes. Models have been changed and evaluated significantly in recent years, highlighting the use of remote sense, GIS and automatic calibration process, allowing them capable of simulating watersheds under a given land-use and climate change effects. However, hydrology models have almost the same physical structure, which is not enough for simulating problems related to the long-term effects of different land-uses. That has been our challenge for next future: to understand entirely the hydrology cycle, having as reference the critical zone, in which the hydrological processes act together from canopy to the bottom of aquifers.Index terms: RUSLE; WEPP; GeoWEPP; LASH; DHSVM; AnnAGNPS. RESUMOModelos têm sido usados pelo homem há milhares de anos para controlar seu ambiente de uma maneira favorável para melhores condições de vida para os humanos. O uso de modelos hidrológicos tem sido uma ferramenta muito eficaz para apoiar os decisores que lidam com as bacias hidrográficas para subsidiar diversas atividades econômicas e sociais, como o abastecimento público de água, geração de energia, e a disponibilidade de água para a agricultura, entre outros. Objetivou-se, nesta revisão, discutir brevemente alguns modelos muito aplicados ao estudo do movimento da água e solos em paisagens (RUSLE, WEPP, GeoWEPP, LASH, DHSVM and AnnAGNPS), para fornecer informações sobre os mesmos, para auxiliar no entendimento adequado de problemas específicos relacionados com os processos de hidrologia e erosão do solo. Modelos têm sido alterados e avaliados de forma significativa nos últimos anos, com destaque para o uso de sensoriamento remoto, GIS e processo de calibração automática, permitindo aos mesmos que sejam capazes de simular bacias hidrográficas nas suas condições atuais de uso do solo e mudanças climáticas. No entanto, os modelos hidrológicos têm quase a mesma estrutura física, o que não é suficiente para simular problemas relacionados com os efeitos a longo prazo de diferentes usos do solo. Esse tem sido um dos principais desafios para o futuro: compreender inteiramente o ciclo hidrológico, tendo como referência a zona crítica, na qual os processos hidrológicos agem em conjunto a partir do dossel até a base dos aquíferos.

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A Modeling Approach to Determining the Relationship Between Erosion and Soil Productivity

Cited by 956 publications

References 0 publications

Modelling potential impacts of climate change on water and nitrate export from a mid-sized, semiarid watershed in the US Southwest

Modelling potential impacts of climate change on water and nitrate export from a mid-sized, semiarid watershed in the US Southwest

Hydrological response to climate change in the Lesse and the Vesdre catchments: contribution of a physically based model (Wallonia, Belgium)

Agricultural watershed modeling: a review for hydrology and soil erosion processes

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