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首页> 外文期刊>Environmental Science & Technology >Assessing Regional Hydrology and Water Quality Implications of Large-Scale Biofuel Feedstock Production in the Upper Mississippi River Basin
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Assessing Regional Hydrology and Water Quality Implications of Large-Scale Biofuel Feedstock Production in the Upper Mississippi River Basin

机译：评估密西西比河上游流域大规模生物燃料原料生产的区域水文和水质影响

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摘要

A recent U.S. Department of Energy study estimated that more than one billion tons of biofuel feedstock could be produced by 2030 in the United States from increased corn yield, and changes in agricultural and forest residue management and land uses. To understand the implications of such increased production on water resources and stream quality at regional and local scales, we have applied a watershed model for the Upper Mississippi River Basin, where most of the current and future crop/residue-based biofuel production is expected. The model simulates changes in water quality (soil erosion, nitrogen and phosphorus loadings in streams) and resources (soil-water content, evapotranspiration, and runoff) under projected biofuel production versus the 2006 baseline year and a business-as-usual scenario. The basin average results suggest that the projected feedstock production could change the rate of evapotranspiration in the UMRB by approximately +2%, soil-water content by about -2%, and discharge to streams by -5% from the baseline scenario. However, unlike the impacts on regional water availability, the projected feedstock production has a mixed effect on water quality, resulting in 12% and 45% increases in annual suspended sediment and total phosphorus loadings, respectively, but a 3% decrease in total nitrogen loading. These differences in water quantity and quality are statistically significant (p < 0.05). The basin responses are further analyzed at monthly time steps and finer spatial scales to evaluate underlying physical processes, which would be essential for future optimization of environmentally sustainable biofuel productions.
机译：美国能源部最近的一项研究估计，到2030年，由于玉米产量增加，农业和森林残留物管理以及土地利用的变化，美国将生产超过10亿吨的生物燃料原料。为了了解这种增加的产量对区域和地方规模的水资源和溪流质量的影响，我们对密西西比河上游流域应用了分水岭模型，该流域模型预计将以当前和未来的作物/残留物为基础的生物燃料的大部分生产。该模型模拟了在预计的生物燃料产量与2006年基准年和常规情况下的水质变化（水蚀，溪流中的氮和磷含量）和资源（土壤水含量，蒸散量和径流量）的变化。流域平均结果表明，与基准情景相比，预计的原料产量可能使UMRB的蒸散速率变化约+ 2％，土壤水含量变化约-2％，流向河流的排放量变化-5％。但是，与对区域水资源供应量的影响不同，预计的原料生产对水质的影响喜忧参半，分别导致年度悬浮沉积物和总磷负荷分别增加12％和45％，但总氮负荷减少3％ 。这些水量和水质的差异具有统计学意义（p <0.05）。流域响应将在每月的时间步长和更精细的空间尺度上进行进一步分析，以评估潜在的物理过程，这对于将来优化环境可持续的生物燃料生产至关重要。

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  • 来源
    《Environmental Science & Technology》 |2012年第16期|p.9174-9182|共9页
  • 作者

    Yonas Demissie; Eugene Yan; May Wu;

  • 作者单位

    Environmental Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States;

    Environmental Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States;

    Energy Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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