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Study on the Quantification of Drought in Freshwater Wetlands-A Case Study in Baiyangdian Wetland

机译：淡水湿地干旱定量研究-以白洋淀湿地为例

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摘要

Drought index is an important tool for monitoring and evaluation. A new drought index for freshwater wetlands is developed based on water balance, then used to evaluate drought in Baiyangdian Wetland (BW). Choosing the high resolution data-daily water stage (if not available, choose monthly data alternatively) as input data to compute the Wetland Drought Index (WDI). The results may be presented in monthly, seasonal or annual scale, such as Standard Precipitation Index (SPI). Daily data was used in calculating WDI during 1960 to 1986, and the results are revealed in monthly, seasonal and annual time scale to compare with SPI and China Z Index (CZI). The results of WDI are in accordance with the local record of wetland drought (Anxin county annals, 2000), while the other indices are not. Daily data produce the most precise dating of droughts, but these data were not available after 1986, therefore monthly data were used. For the period before 1986, comparisons using monthly data and daily data identify the same droughts, and show only minor differences in resolving drought onset and termination dates. During 1960 to 2008, the frequency of drought was increasing, mainly because of the low precipitation and controlling of reservoirs upstream. There are five mainly drought periods identified by WDI during this time: 1965～1967,1972 ～1973, 1975～1976, 1980～1986 and 2000～2008, which are not identified by SPI and CZI.
机译：干旱指数是监测和评估的重要工具。基于水分平衡，开发了一种新的淡水湿地干旱指数，然后用于评估白洋淀湿地（BW）的干旱。选择高分辨率数据的每日水位（如果没有，则选择月度数据）作为输入数据，以计算湿地干旱指数（WDI）。结果可以以月度，季节或年度比例（例如标准降水指数（SPI））显示。 1960年至1986年使用每日数据计算WDI，并按月，季节和年度时间范围显示结果，以与SPI和中国Z指数（CZI）进行比较。 WDI的结果与当地的湿地干旱记录一致（安新县志，2000年），而其他指标则与之不同。每日数据可得出最准确的干旱年代，但1986年以后无法获得这些数据，因此使用了每月数据。对于1986年之前的时期，使用月度数据和每日数据进行的比较确定了相同的干旱，并且在解决干旱的开始和终止日期方面仅显示了很小的差异。在1960年至2008年期间，干旱的频率在增加，这主要是由于降水不足和上游水库的控制。 WDI在此期间确定了五个主要的干旱时期：1965〜1967、1972〜1973、1975〜1976、1980〜1986和2000〜2008，而SPI和CZI并未确定。

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  • 来源
    《Wetlands》 |2014年第5期|1013-1025|共13页
  • 作者

    Q. Wang; D. H. Yan; Y. Yuan; D. Y. Wang;

  • 作者单位

    School of Environment, Beijing Normal University, Beijing 100875,People's Republic of China,State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Room 948, Building A, No.1, Yuyuantan Road (South), Haidian District, Beijing, People's Republic of China;

    School of Environment, Beijing Normal University, Beijing 100875,People's Republic of China;

    School of Environment, Beijing Normal University, Beijing 100875,People's Republic of China;

    School of Environment, Beijing Normal University, Beijing 100875,People's Republic of China;

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

    Freshwater wetlands; Drought index; Water balance; Baiyangdian wetland;

    机译：淡水湿地;干旱指数水平衡;白洋淀湿地;

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