Estimating the demand for irrigation water in a humid climate: A case study from the southeastern United States

Mullen, John D.; Yu, Yanyan; Hoogenboom, Gerrit

doi:10.1016/j.agwat.2009.04.003

Cited by 36 publications

(28 citation statements)

References 11 publications

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“…The negative effects of decreased river flow on DOC flux are likely to be exacerbated by increasing human water demand [ Vörösmarty et al ., ]. For example, the southeastern U.S. has experienced dramatic widespread increases in farm pond construction [ De Steven and Lowrance , ] and center pivot irrigation [ Mullen et al ., ] over the past few decades. While farm ponds are not likely to have an impact during periods of adequate rainfall, impoundment of water and withdrawal for irrigation during the growing season likely contribute to low flows [ Lowrance et al ., ], thereby lengthening dry periods and indirectly affecting carbon cycling.…”

Section: Discussionmentioning

confidence: 99%

Interannual drought length governs dissolved organic carbon dynamics in blackwater rivers of the western upper Suwannee River basin

et al. 2013

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[1] The Little River (LR) in southern Georgia, U.S., has experienced lengthening droughts since monitoring began in 1972. We evaluated the impacts of drought on riverine carbon cycling using a 9 year data set of dissolved organic carbon (DOC) coupled with laboratory experiments in the LR, as well as long-term data sets in three additional rivers within the Suwannee River basin. Longer drought periods reduced downstream DOC export but also led to higher DOC concentrations in the following hydroperiod. Within a hydroperiod, DOC concentration was positively correlated with temperature and negatively correlated with river discharge but also negatively correlated with total discharge during the previous hydroperiod. Among hydroperiods, DOC concentration was more strongly correlated with antecedent hydrological conditions than with current hydrological conditions across broad spatial scales: in three additional rivers within the Suwannee River basin (Alapaha, Withlacoochee, and Okapilco) and in headwater and downstream reaches of the LR. Microbial DOC consumption and CO 2 production were elevated when DOC concentration was high. Despite dramatic hydrologic changes, DOC composition appeared stable, with optical analyses suggesting that LR DOC is primarily composed of three terrestrial humic-like fluorescence groups. If the current climatic trend of intensifying droughts, elevated temperatures and decreased discharge continue, our results suggest the net effect may be for a more localized riverine carbon cycle with reduced downstream transport of DOC, but higher local mineralization rates due to elevated DOC concentrations.

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Section: Discussionmentioning

confidence: 99%

Interannual drought length governs dissolved organic carbon dynamics in blackwater rivers of the western upper Suwannee River basin

et al. 2013

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“…Numerous studies focused on agricultural water needs based on irrigation water (e.g. Rosenzweig et al, 2004;Thomas, 2008;Schaldach et al, 2012;Mullen et al, 2009;Minacapilli et al, 2008;Wu and Chen, 2013). This is probably because in many regions irrigation is the main water use and the development of irrigated areas is often considered as a strategic way to maintain agricultural activity.…”

Section: Scientific and Technical Challenges In The Assessment Of Watmentioning

confidence: 99%

“…Fischer et al, 2007;Mullen et al, 2009;Breyer et al, 2012), a key contribution of the present study was separating the assessment of the components of water demand and their main drivers, and computing them in normalized time series (time step, time depth). This study shows that distinguishing between the components of water demand is absolutely necessary to understand the drivers of changes in water demand and to identify separate trends.…”

Section: Outcomementioning

confidence: 99%

Historical reconstruction and 2050 projections of water demand under anthropogenic and climate changes in two contrasted Mediterranean catchments

Grouillet

Fabre

Ruelland

et al. 2015

Journal of Hydrology

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“…The software has also been applied to controlled tile drainage-subsurface irrigation systems (Liu et al, 2011). Hence, DSSAT is particularly useful for predicting the short-, medium-, and long-term impacts of specific land management practices on crop yield, soil water storage, and nitrate-N leaching losses (Boote et al, 2010;Gheysari et al, 2009;Mullen et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Coupling DSSAT and HYDRUS-1D for simulations of soil water dynamics in the soil-plant-atmosphere system

Shelia

Šimůnek

Boote

et al. 2018

Journal of Hydrology and Hydromechanics

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Accurate estimation of the soil water balance of the soil-plant-atmosphere system is key to determining the availability of water resources and their optimal management. Evapotranspiration and leaching are the main sinks of water from the system affecting soil water status and hence crop yield. The accuracy of soil water content and evapotranspiration simulations affects crop yield simulations as well. DSSAT is a suite of field-scale, process-based crop models to simulate crop growth and development. A "tipping bucket" water balance approach is currently used in DSSAT for soil hydrologic and water redistribution processes. By comparison, HYDRUS-1D is a hydrological model to simulate water flow in soils using numerical solutions of the Richards equation, but its approach to crop-related process modeling is rather limited. Both DSSAT and HYDRUS-1D have been widely used and tested in their separate areas of use. The objectives of our study were: (1) to couple HYDRUS-1D with DSSAT to simulate soil water dynamics, crop growth and yield, (2) to evaluate the coupled model using field experimental datasets distributed with DSSAT for different environments, and (3) to compare HYDRUS-1D simulations with those of the tipping bucket approach using the same datasets. Modularity in the software design of both DSSAT and HYDRUS-1D made it easy to couple the two models. The pairing provided the DSSAT interface an ability to use both the tipping bucket and HYDRUS-1D simulation approaches. The two approaches were evaluated in terms of their ability to estimate the soil water balance, especially soil water contents and evapotranspiration rates. Values of the d index for volumetric water contents were 0.9 and 0.8 for the original and coupled models, respectively. Comparisons of simulations for the pod mass for four soybean and four peanut treatments showed relatively high d index values for both models (0.94-0.99).

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Estimating the demand for irrigation water in a humid climate: A case study from the southeastern United States

Cited by 36 publications

References 11 publications

Interannual drought length governs dissolved organic carbon dynamics in blackwater rivers of the western upper Suwannee River basin

Interannual drought length governs dissolved organic carbon dynamics in blackwater rivers of the western upper Suwannee River basin

Historical reconstruction and 2050 projections of water demand under anthropogenic and climate changes in two contrasted Mediterranean catchments

Coupling DSSAT and HYDRUS-1D for simulations of soil water dynamics in the soil-plant-atmosphere system

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