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Causes of animal extinction in small irrigation reservoirs in Japan and requirements for future re-establishment

机译：日本小型灌溉水库中动物灭绝的原因和对未来重建的要求

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摘要

In the past, small irrigation reservoirs were constructed only for rice paddy irrigation in Japan. Many of the watersheds for these irrigation reservoirs were forests. These watersheds have been gradually developed into farmland or housing areas. After World War II, the use of chemical fertilizers, such as ammonium sulphate, became popular in upland fields in Japan. As a result, there are high concentrations of nitrates in groundwater and spring water under upland fields. Hence, irrigation reservoirs that collect water from these watersheds have been polluted by nitrates. High nitrates concentrations in irrigation reservoirs have been found where the watershed is located close to tea yards. However, there has been minimal research into these reservoirs in the fields of limnology and agricultural engineering. We have therefore tried to verify the water-quality characteristics in irrigation reservoirs from the point of view of water-quality conservation. In the process of the investigation, we encountered a quite significant reservoir called the Tanno Reservoir that has not seen any forms of life. We examined the causes of this lack of life, as well as measures that could be taken for the remediation of such a reservoir. This paper discusses and clarifies the results of these studies.
机译：过去，小型灌溉水库仅在日本用于稻田灌溉。这些灌溉水库的许多分水岭是森林。这些流域已逐渐发展为农田或房屋区域。第二次世界大战后，化学肥料的使用，例如硫酸铵，在日本的陆地上变得很流行。结果，在旱田下的地下水和泉水中硝酸盐浓度很高。因此，从这些流域收集水的灌溉水库已被硝酸盐污染。在分水岭靠近茶场的地方，灌溉水库中硝酸盐浓度很高。但是，在林学和农业工程领域对这些储层的研究很少。因此，我们试图从水质保护的角度验证灌溉水库的水质特征。在调查过程中，我们遇到了一个非常重要的水库，称为“丹诺水库”，它没有任何生命形式。我们研究了这种缺乏生命的原因，以及可以采取的补救措施。本文讨论并澄清了这些研究的结果。

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  • 来源
    《Lakes & Reservoirs》 |2002年第1期|49-54|共6页
  • 作者

    Hideo Nakasone; Hisao Kuroda; Tasuku Kato;

  • 作者单位

    Department of Irrigation Drainage and Environmental Engineering School of Agriculture Ibaraki University Ami-Chuoh 3-21-1 Inashiki Ibaraki 300-0393 Japan;

    Department of Irrigation Drainage and Environmental Engineering School of Agriculture Ibaraki University Ami-Chuoh 3-21-1 Inashiki Ibaraki 300-0393 Japan;

    Department of Irrigation Drainage and Environmental Engineering School of Agriculture Ibaraki University Ami-Chuoh 3-21-1 Inashiki Ibaraki 300-0393 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    acid reservoir; limnology; nitrate; nitrogen; small irrigation reservoir;

    机译：酸性储层;语言学;硝酸盐;氮;小型灌溉水库;

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