吉林大学学报(地球科学版) ›› 2022, Vol. 52 ›› Issue (3): 967-978.doi: 10.13278/j.cnki.jjuese.20200321

• 地质工程与环境工程 • 上一篇    下一篇

湖南紫鹊界梯田自流灌溉系统降水条件

危润初1,2,3,张豪1,2,3,龙秋波4,彭向训1,2,3,周升健5   

  1. 1.长沙理工大学水利工程学院,长沙410004

    2.水沙科学与水灾害防治湖南省重点实验室,长沙410004

    3.洞庭湖水环境治理与生态修复湖南省重点实验室,长沙410004

    4.湖南省水利水电勘测设计研究总院,长沙410008

    5.湖南娄底市水文与水资源勘测中心,湖南娄底417000

  • 出版日期:2022-05-26 发布日期:2024-01-05
  • 基金资助:

    国家自然科学基金项目(41602264);湖南省自然科学基金项目(2020JJ5572);长沙理工大学“双一流”科学研究国际合作拓展项目(2019IC08)


Rainfall Condition of Artesian Irrigation System of Ziquejie Terrace in Hunan Province

Wei Runchu1,2,3, Zhang Hao1,2,3, Long Qiubo4, Peng Xiangxun 1,2,3, Zhou Shengjian5   

  1. 1. School of Hydraulic Engineering, Changsha University of Science and Technology, Changsha 410004, China

    2. Hunan Key Laboratory of Water and Sand Science and Water Disaster Prevention, Changsha 410004, China

    3. Key Laboratory of Water Environment Treatment and Ecological Restoration of Dongting Lake, Changsha 410004, China

    4. Hunan Survey and Design Research Institute of Water Conservancy and Hydropower, Changsha 410008, China

    5. Loudi Hydrology and Water Resources Survey Center, Loudi 417000, Hunan, China

     


  • Online:2022-05-26 Published:2024-01-05
  • Supported by:
    Supported by the National Natural Science Foundation of China (41602264),the National Natural Science Foundation of Hunan Province (2020JJ5572) and the “Double First-Class” Scientific Research International Cooperation Expansion Project of Changsha University of Science and Technology (2019IC08)

摘要: 为了全面认识湖南紫鹊界梯田系统的水循环机制,从降水条件的视角出发,基于紫鹊界地区及周边共11个气象站的1986—2015年降水序列数据,运用集中度、标准化降水指数等方法从降水量、降水年内分配、干旱频率等方面开展对比分析,以揭示紫鹊界地区梯田稻作自流灌溉系统所拥有的独特的天然降水条件。结果表明:紫鹊界地区3个气象站多年平均降水量达1 638.7 mm,比外围8个站平均高出177.4 mm,其中夏季(6—8月)平均降水量为675.1 mm,比外围8个站平均高出122.4 mm;紫鹊界3个站旬降水序列的平均集中度为0.373,明显高于外围8个站的平均值0.354,夏季是紫鹊界地区降雨的主要优势时段,多年平均降雨高峰为6月中旬,晚于外围8个站的6月上旬或5月下旬;紫鹊界地区5—8月的3个月时间尺度干旱频率有“先小后大”的特征, 其中5月和6月的3个月时间尺度干旱频率明显要小于全区平均值,7月和8月要大于平均值;6月上旬—8月中旬是紫鹊界梯田灌溉的主要时期,紫鹊界地区降水年内分配、多年平均干旱频率分布特征等与紫鹊界梯田的水稻生长期形成良好的匹配关系,降水是紫鹊界梯田自流灌溉系统的重要自然支撑条件。

关键词: 紫鹊界梯田, 自流灌溉系统, 降水条件, 集中度, 标准化降水指数

Abstract: In order to deeply understand the water cycle mechanism of Ziquejie Terrace in Hunan Province, a comparative study between the Ziquejie region and the surrounding areas was carried out to reveal the superior precipitation condition behind the terraces with the help of the concentration degree (DC) and rainfall standard index (ISP) methods, based on the precipitation data of 11 meteorological stations in the Ziquejie region and the surrounding areas from 1986 to 2015. The results show that the annual average rainfall in the Ziquejie region is 1 638.7 mm, which is 177.4 mm higher than that of the eight outer stations. The average rainfall in summer (from June to August) is 675.1 mm, which is 122.4 mm higher than the eight outer stations. The average DC of ten-day rainfall sequence of the three stations in Ziquejie is 0.373, which is significantly higher than the average value of 0.354 of the eight outside stations. Summer is the main predominant period of rainfall for the Ziquejie Terrace region. The average rainfall peak period in the Ziquejie Terrace region is in mid-June, later than the eight outside stations in early June or late May. The drought frequency of the three-month time scale shows the characteristics of “small first and then large”  from May to August in the Ziquejie region: The values of drought frequency in May and June are markedly less than the average value of the whole region, while the values in July and August are just the opposite. The main irrigation period of rice in the Ziquejie region lasts from mid-June to mid-August. The seasonal distributions of rainfall and drought frequency form a good match with the rice growth-period in the Ziquejie Terrace region, which is one of the important supporting conditions of the artesian irrigation system.

Key words:  Ziquejie Terrace, artesian irrigation system, rainfall condition, concentration, standard rainfall index

中图分类号: 

  • P426.6
[1] 欧阳琦, 陈欣, 危润初, 伍诗梦, 朱志远.

紫鹊界梯田失稳机制 [J]. 吉林大学学报(地球科学版), 2024, 54(2): 581-591.

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