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首页> 外文期刊>Fresenius Environmental Bulletin >RISK ASSESSMENT AND IDENTIFICATION OF CRITICAL SOURCE AREAS FOR DIFFUSE PHOSPHORUS LOSS IN SHUANGYANG RIVER WATERSHED, NORTHEAST CHINA
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RISK ASSESSMENT AND IDENTIFICATION OF CRITICAL SOURCE AREAS FOR DIFFUSE PHOSPHORUS LOSS IN SHUANGYANG RIVER WATERSHED, NORTHEAST CHINA

机译：东北双阳河流域弥漫性磷流失关键源区的风险评估与识别

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摘要

Phosphorus (P) index, a simple risk assessment tool for diffuse P loss, is widely applied because of its proven validity and practicability. In this study, the P index was modified and applied in Shuangyang River watershed, Northeast China, to assess P loss risk and identify critical source areas based on a field survey of diffuse P loss characteristics. The experiment added domestic waste as a specific source factor, taking into consideration its condition and converted gross content of fertilizer, manure, and domestic waste P into the net available P (P_2O_5). The modifications were made in order to reflect the direct influence of P loss to water quality. Qualitatively, results indicated that P loss risk is low and medium in most areas in the watershed, accounting for 70.28% of the total area, while very high-risk areas account for 6.93%. Moreover, vulnerable areas are distributed mainly along the Shuangyang River channel, which consists of areas subjected to high fertilizer and manure usage, as well as high P transfer risk. Sub-watershed results showed that P loss risk in the southern part of the watershed area covered in this study is higher than that in the northern part. The importance of the sources and of the transport factors for P loss are almost equivalent, estimated at 63% and 65% of the P index variation, respectively. Fertilizer usage, among the four source factors, is the most sensitive to P loss, having a significant correlation with the total source value (R~2 = 0.99). Soil erosion and surface runoff are the most important transport factors for P loss, except for contributing distance. The application of science-tested fertilizer and effective manure management in areas with high surface runoff and soil erosion risk is effective in controlling P loss. Overall, the study illustrates the potential of the modified P index to detect areas with the highest risk for P loss.
机译：磷（P）指数是一种用于弥散性P损失的简单风险评估工具，由于其经证实的有效性和实用性而得到广泛应用。在这项研究中，对P指数进行了修改，并应用于中国东北双阳河流域，以基于弥散P损失特征的实地调查评估P损失风险并确定关键源区。该实验考虑到其条件，将生活垃圾添加为特定的源因子，并将化肥，粪便和生活垃圾的总含量P转换为净可用P（P_2O_5）。进行修改是为了反映磷损失对水质的直接影响。定性地，结果表明该流域大多数地区的磷流失风险为中低水平，占总面积的70.28％，而高风险区域占6.93％。此外，脆弱区域主要分布在双阳河河道上，该河道由化肥和肥料使用量高，磷迁移风险高的地区组成。次流域结果表明，本研究覆盖的流域南部的磷流失风险高于北部。 P损失的来源和运输因子的重要性几乎相等，估计分别为P指数变化的63％和65％。在四个来源因素中，肥料的使用对磷的损失最敏感，与总来源值有显着的相关性（R〜2 = 0.99）。除侵蚀距离外，水土流失和地表径流是磷流失最重要的运输因子。在高地表径流和水土流失风险较高的地区，使用经过科学检验的肥料和有效的粪肥管理措施可以有效控制磷的流失。总体而言，该研究表明，改良的P指数可以检测出P损失风险最高的地区。

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  • 来源
    《Fresenius Environmental Bulletin》 |2010年第12期|p.2832-2839|共8页
  • 作者

    Sumei Zhang; Zongming Wang; Bai Zhang; Chunying Ren; Kaishan Song; Dianwei Liu; Liangjun Hu;

  • 作者单位

    Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China,Graduate School, Chinese Academy of Sciences, Beijing 100049, China;

    Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China;

    Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China;

    Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China;

    Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China;

    Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin Province 130012, China;

    Northeast Normal University, Changchun, Jilin Province, 130024, China;

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  • 正文语种 eng
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  • 关键词

    risk assessment; critical source areas; phosphorus loss; phosphorus index; shuangyang river watershed; northeast China;

    机译：风险评估;关键来源地区;磷损失磷指数双阳河流域;中国东北;

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