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The Role of Ground Water in Arid/Semiarid Ecosystems, Northwest China

机译：西北地区干旱/半干旱生态系统中地下水的作用

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摘要

Ground water plays an important role in water supply and the ecology of arid to semiarid areas such as Northwest China, where the landscape is fragile due to frequent drought in the past few decades. This paper discusses the role of ground water in these ecosystems, including the effect of condensation water and water table depth on the growth of plants and degree of soil salinity. The paper also discusses the controlling process for land desertification and soil sali-nization in Northwest China. Water table depth is a key factor controlling the water balance, ground water flow, and salt transport in the vadose zone. The suitable water table depth for vegetation growth, which can prevent land desertification and soil salinization, is within a range of 2 to 4 m; the optimal depth is ～3 m. As examples, changes in ecosystems owing to water resources development in Tarim and Manas basins, Xinjiang, China, are discussed.
机译：地下水在干旱和半干旱地区的生态系统（例如中国西北地区）中发挥着重要作用，在过去的几十年中，由于干旱频发，该地区的土地景观十分脆弱。本文讨论了地下水在这些生态系统中的作用，包括凝结水和地下水位深度对植物生长和土壤盐分度的影响。本文还讨论了西北地区土地沙漠化和盐碱化的控制过程。地下水位深度是控制渗流区内水平衡，地下水流量和盐分传输的关键因素。可以防止土地荒漠化和土壤盐渍化的适合植被生长的地下水位深度在2至4 m范围内；最佳深度为〜3 m。例如，讨论了中国新疆塔里木盆地和玛纳斯盆地由于水资源开发而引起的生态系统变化。

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  • 来源
    《Ground water》 |2005年第4期|p.471-477|共7页
  • 作者

    Yali Cui; Jingli Shao;

  • 作者单位

    School of Water Resources and Environment, China University of Geosciences, 29, Xueyuan Road, Haidian District, Beijing, 100083, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 水文科学（水界物理学）;
  • 关键词

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