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Modeling dissolved organic carbon mass balances for lakes of the Muskoka River Watershed

机译：穆斯科卡河流域湖泊溶解有机碳质量平衡模型

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摘要

Changes in the flux of dissolved organic carbon (DOC) into and out of lakes are important to the biogeochemistry of aquatic environments. The ability to estimate or model DOC fluxes and concentrations in lakes and other surface waters is of great benefit for investigations of aquatic systems. Spatial attributes of catchments were derived using GIS techniques and combined with published DOC mass balance models from 20 small study catchments and seven lakes to estimate DOC concentrations for hydrologically connected lakes (i.e. connected by surface or ground waters) of the Muskoka River Watershed, a large tertiary watershed (904 lakes) in southern Ontario. Predicted DOC concentrations were very dependent on the method used to estimate wetland area. When a Rapid Assessment Technique (RAT) was used to estimate wetland area, predicted and observed DOC concentrations were linearly related. Most of the DOC residuals were< 1 mgL~(-1). Inclusion of riparian wetlands or small lakes in the contributing catchments resulted in a slight improvement of model predictions, but not beyond the variability of the model. Model predictions of DOC were reasonable (according to model fit and residuals), especially considering it was a regional-scale study, but substantial variability was still unaccounted for. Applying the model to other regions with similar landscapes (i.e. other watersheds on the Precambrian Shield in North America and Nordic countries) is feasible.
机译：溶解有机碳（DOC）流入和流出湖泊的通量的变化对于水生环境的生物地球化学很重要。估计或模拟湖泊和其他地表水中的DOC通量和浓度的能力对于研究水生系统非常有用。流域的空间属性是使用GIS技术得出的，并与20个小型研究流域和7个湖泊的已发布DOC质量平衡模型相结合，以估算大口Muskoka河流域的水文连通湖泊（即通过地表水或地下水连接的湖泊）的DOC浓度。安大略南部的第三流域（904个湖泊）。 DOC的预测浓度非常依赖于估算湿地面积的方法。当使用快速评估技术（RAT）估算湿地面积时，预测和观察到的DOC浓度呈线性相关。大部分DOC残留<1 mgL〜（-1）。在贡献集水区包括河岸湿地或小湖导致模型预测略有改善，但并未超出模型的可变性。 DOC的模型预测是合理的（根据模型的拟合度和残差），特别是考虑到它是区域规模的研究，但仍然无法确定实质性的可变性。将模型应用于景观相似的其他区域（即北美和北欧国家的前寒武纪盾构上的其他分水岭）是可行的。

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  • 来源
    《Hydrology research》 |2009年第3期|273-290|共18页
  • 作者

    E. M. OConnor; P. J. Dillon; L. A. Molot; I. F. Creed;

  • 作者单位

    Environmental and Resource Studies Program, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada K9J 7B8;

    Environmental and Resource Studies Program, Trent University, 1600 West Bank Drive, Peterborough, ON, Canada K9J 7B8;

    Faculty of Environmental Studies, York University, 4700 Keele Street, Toronto, ON, Canada M3J 1P3;

    Department of Biology, University of Western Ontario, London, ON, Canada N6A 5B7;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    dissolved organic carbon; fluxes; mass balance model; precambrian shield; wetland;

    机译：溶解有机碳助焊剂质量平衡模型;前寒武纪盾湿地;

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